Günter Helmchen

Günter Helmchen's AcademicInfluence.com Rankings

Günter Helmchen

Chemistry

#3121

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#4112

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Organic Chemistry

#493

World Rank

#571

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Chemistry

Günter Helmchen's Degrees

PhD Chemistry University of Göttingen

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Günter Helmchen's Published Works

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Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Basic Principles of the CIP-System and Proposals for a Revision† (1982) (472)
Phosphinoaryl- and phosphinoalkyloxazolines as new chiral ligands for enantioselective catalysis: Very high enantioselectivity in palladium catalyzed allylic substitutions (1993) (391)
Iridium-catalysed asymmetric allylic substitutions. (2007) (332)
Iridium-Catalyzed Asymmetric Allylic Substitution Reactions. (2019) (324)
Catalysis of allylic substitutions by Pd complexes of oxazolines containing an additional P, S, or Se Center. X-ray crystal structures and solution structures of chiral π-allyl palladium complexes of phosphinoaryloxazolines (1994) (219)
Enantioselective palladium-catalyzed allylic substitutions with asymmetric chiral ligands (1999) (201)
Asymmetric Two‐Center Catalysis—Learning from Nature (1996) (185)
On the Importance of the Headgroup Substrate Bond in Thiol Monolayers: A Study of Biphenyl-Based Thiols on Gold and Silver (2001) (180)
Applications of Iridium-Catalyzed Asymmetric Allylic Substitution Reactions in Target-Oriented Synthesis. (2017) (179)
First Enantioselective Alkylations of Monosubstituted Allylic Acetates Catalyzed by Chiral Iridium Complexes (1997) (162)
Iridium-catalyzed allylic vinylation and asymmetric allylic amination reactions with o-aminostyrenes. (2011) (147)
Ir-catalysed allylic substitution: mechanistic aspects and asymmetric synthesis with phosphorus amidites as ligands (1999) (135)
Highly enantioselective syntheses of heterocycles via intramolecular Ir-catalyzed allylic amination and etherification. (2005) (123)
Salt-free iridium-catalyzed asymmetric allylic aminations with N,N-diacylamines and ortho-nosylamide as ammonia equivalents. (2006) (121)
Palladium‐Catalyzed Allylic Alkylation with Phosphinoaryldihydrooxazole Ligands: First Evidence and NMR Spectroscopic Structure Determination of a Primary Olefin–Pd0 Complex (1997) (118)
Regio- and enantioselective iridium-catalyzed allylic alkylation with in situ activated P,C-chelate complexes. (2004) (117)
Enantioselective allylic amination with chiral (phosphino-oxazoline)pd catalysts (1994) (109)
Diastereoface-discriminative metal coordination in asymmetric synthesis: D-pantolactone as practical chiral auxiliary for Lewis acid catalyzed Diels-Alder reactions☆ (1985) (108)
Pseudoasymmetrie in der organischen Chemie (1972) (99)
Iridium-catalyzed asymmetric allylic substitutions--very high regioselectivity and air stability with a catalyst derived from dibenzo[a,e]cyclooctatetraene and a phosphoramidite. (2008) (98)
Preparation of chiral phosphorus, sulfur and selenium containing 2-aryloxazolines (1996) (92)
Highly efficient new catalysts for enantioselective transfer hydrogenation of ketones (1996) (91)
Iridium‐Catalysed Allylic Substitution: Stereochemical Aspects and Isolation of IrIII Complexes Related to the Catalytic Cycle (2002) (90)
Enantioselective Allylic Substitution of Cyclic Substrates by Catalysis with Palladium Complexes of P,N-Chelate Ligands with a Cymantrene Unit. (1998) (88)
First intramolecular enantioselective iridium-catalysed allylic aminations. (2004) (84)
Enantioselective total synthesis of (-)-alpha-kainic acid. (2010) (84)
Enantioselective catalysis with complexes of asymmetric P,N-chelate ligands (1997) (83)
Gold-catalyzed intermolecular addition of carbonyl compounds to 1,6-enynes. (2007) (81)
Concerning the Mechanism of the Asymmetric Diels‐Alder Reaction: First Crystal Structure Analysis of a Lewis Acid Complex of a Chiral Dienophile (1985) (81)
Highly Enantioselective Homoaldol Additions with Chiral N‐Allylureas—Application to the Synthesis of Optically Pure γ‐Lactones (1984) (77)
(Phosphanyloxazoline)palladium complexes, part I: (Eta3-1,3-dialkylallyl)(phosphanyloxazoline)palladium complexes: X-ray crystallographic studies, NMR investigations, and quantum-chemical calculations. (2001) (75)
Ir-catalysed asymmetric allylic substitutions with cyclometalated (phosphoramidite)Ir complexes--resting states, catalytically active (pi-allyl)Ir complexes and computational exploration. (2010) (72)
Regio- and enantioselective iridium-catalysed allylic aminations and alkylations of dienyl esters. (2004) (71)
C2-Symmetric Bioxazolines and Bithiazolines as New Chiral Ligands for Metal Ion Catalyzed Asymmetric Syntheses: Asymmetric Hydrosilylation (1991) (67)
Asymmetric IrI‐Catalysed Allylic Alkylation Of Monosubstituted Allylic Acetates With Phosphorus Amidites As Ligands (2003) (65)
Enantio‐ and anti‐Diastereoselective Aldol Additions of Acetates and Propionates via O‐Silyl Ketene Acetals (1985) (65)
Palladium Complex Catalyzed Asymmetric Allylic Substitutions with Nitromethane: Enantioselectivities Exceeding 99.9%ee (1996) (64)
Grundlagen des CIP‐Systems und Vorschläge für eine Revision (2006) (63)
Influence of polar groups in thermal and Lewis acid promoted asymmetric diels-alder additions: lactic acid derivatives as practical highly selective and configurationally dichotomic reagents (1984) (62)
Ir-Catalyzed asymmetric allylic substitutions with (phosphoramidite)Ir complexes-resting states, synthesis, and characterization of catalytically active (pi-allyl)Ir complexes. (2009) (60)
Enantioselective synthesis of (+)(R)- and (-)(S)-nicotine based on Ir-catalysed allylic amination. (2005) (60)
Highly enantioselective iridium-catalysed allylic aminations with anionic N-nucleophiles. (2005) (60)
Addition of organometallic reagents to chiral N-methoxylactams: enantioselective syntheses of pyrrolidines and piperidines. (2013) (60)
Asymmetric synthesis with chemical and biological methods (2007) (59)
Synthesis and Application of the First Chiral and Highly Lewis Acidic Silyl Cationic Catalyst (1998) (59)
Asymmetrische Zweizentren‐Katalyse – von der Natur lernen (1996) (58)
Enantiomerically pure cycloalkenylacetic acid derivatives via Pd-catalyzed asymmetric allylic alkylation and subsequent enantiomeric enrichment via iodolactones (1994) (58)
Synthesis of the stereoisomers of 17,21-dimethylheptatriacontane - sex recognition pheromone of the tsetse fly (1980) (58)
Preparation of chiral triarylphosphines by Pd-catalysed asymmetric P-C cross-coupling. (2004) (58)
Differential effects of the brefeldin A analogue (6R)-hydroxy-BFA in tobacco and Arabidopsis. (2011) (57)
Asymmetric Iridium(I)-Catalyzed Allylic Alkylation of Monosubstituted Allylic Substrates with Phosphinooxazolines as Ligands. Isolation, Characterization, and Reactivity of Chiral (Allyl)iridium(III) Complexes (2004) (57)
Enantioselective syntheses of 2,5-disubstituted pyrrolidines based on iridium-catalyzed allylic aminations--total syntheses of alkaloids from amphibian skins. (2011) (56)
Enantioselective modular synthesis of 2,4-disubstituted cyclopentenones by iridium-catalyzed allylic alkylation. (2006) (54)
A configurational switch based on iridium-catalyzed allylic cyclization: application in asymmetric total syntheses of prosopis, dendrobate, and spruce alkaloids. (2009) (53)
Enantioselective Diels-Alder reactions of enals: Fighting species multiplicity of the catalyst with donor solvents (1991) (52)
(Eta3-phenylallyl)(phosphanyloxazoline)palladium complexes: X-ray crystallographic studies, NMR investigations, and Ab initio/DFT calculations. (2002) (50)
Synthesis of amino acid derivatives via enantio- and diastereoselective Pd-catalyzed allylic substitutions with a non-stabilized enolate as nucleophile. (2002) (50)
Funktionelle Gruppen in konkaver Lage: Asymmetrische Diels-Alder-Synthese mit nahezu vollständiger (Lewis-Säure-katalysiert) und hoher (unkatalysiert) Stereoselektivität†‡ (1981) (50)
Stereoselective synthesis of 2,6-disubstituted piperidines using the iridium-catalyzed allylic cyclization as configurational switch: asymmetric total synthesis of (+)-241 d and related piperidine alkaloids. (2009) (49)
Functional Groups at Concave Sites: Asymmetric Diels‐Alder Synthesis with Almost Complete (Lewis‐Acid Catalyzed) or High (Uncatalyzed) Stereoselectivity (1981) (48)
Asymmetric synthesis of β-substituted alcanoic acids via highly stereoselective conjugate additions of organocopper compounds to chiral enoates (1985) (48)
Functional Groups at Concave Sites: Asymmetric Alkylation of Esters with Very High Stereoselectivity and Reversal of Configuration by Change of Solvent (1981) (48)
Carbocycles via enantioselective inter- and intramolecular iridium-catalysed allylic alkylations. (2005) (48)
Über eine neue methode zur bestimmung der absoluten konfiguration von chiralen sekundären alkoholen und aminen: nmr-spektroskopie von diastereomeren estern und amiden der α-phenylbutter- und hydratropasäure (1974) (47)
New chiral β-phosphinocarboxylic acids and their application in palladium-catalysed asymmetric allylic alkylations (1995) (47)
Preparative Scale Directed Resolution of Enantiomeric Carboxylic Acids and Lactones via Liquid Chromatography and Neighboring‐Group Assisted Hydrolysis of Diastereomeric Amides (1979) (47)
Preparation of Enantiomerically Pure Chiral Alcohols by Asymmetric Alkylation of Glycolates (1984) (46)
Salzfreie Iridium‐katalysierte allylische Aminierungen mit N,N‐Diacylaminen und ortho‐Nosylamid als Ammoniak‐Äquivalenten (2006) (46)
Total syntheses of sandalwood fragrances: (Z)- and (E)-β-santalol and their enantiomers, ent-β-santalene (1990) (45)
Zum Mechanismus der asymmetrischen Diels‐Alder‐Reaktion: Erste Kristallstrukturanalyse eines Lewis‐Säure‐Komplexes eines chiralen Dienophils (1985) (45)
Extreme Liquid Chromatographic Separation Effects in the Case of Diastereomeric Amides Containing Polar Substituents (1979) (44)
Enantioselective Diels-Alder Additions with New Chiral Lewis Acids Derived from Amino Acids (1990) (44)
N-substituted hydroxysuccinimides from (s)-malic acid as new reagents for asymmetric diels-alder additions to enoates (1989) (44)
Regio‐ und enantioselektive Iridium‐katalysierte allylische Alkylierung mit in situ aktivierten P,C‐Chelatkomplexen (2004) (44)
Catalytic asymmetric hydrosilylation of ketones using rhodium-(l)-complexes of chiral phosphinooxazoline ligands (1996) (43)
Preparation of 2,4-disubstituted cyclopentenones by enantioselective iridium-catalyzed allylic alkylation: synthesis of 2'-methylcarbovir and TEI-9826. (2008) (43)
Chiral phosphinooxazolines with a bi- or tricyclic oxazoline moiety - applications in Pd-catalyzed allylic alkylations (1998) (43)
Hochenantioselektive Homoaldol‐Addition mit chiralen N‐Allylharnstoffen ‐ Anwendung zur Synthese optisch reiner γ‐Lactone (1984) (42)
Mono‐ and Bidentate Phosphinanes—New Chiral Ligands and Their Application in Catalytic Asymmetric Hydrogenations (2002) (42)
Enantioselective domino Heck-allylic amination reactions (1999) (40)
Gold-catalyzed intermolecular addition of carbonyl compounds to 1,6-enynes: reactivity, scope, and mechanistic aspects. (2009) (40)
Phosphinooxazolines--a new class of versatile, modular P,N-ligands for asymmetric catalysis. (2000) (40)
Iridiumkatalysierte asymmetrische allylische Substitutionen – sehr hohe Regioselektivität und Luftstabilität mit einem Katalysator auf der Basis von Dibenzo[a,e]cyclooctatetraen und einem Phosphoramidit (2008) (40)
Application of Rhodium Complexes of Chiral Diphenylphosphino‐Functionalized N‐Heterocyclic Carbenes as Catalysts in Enantioselective Conjugate Additions of Arylboronic Acids (2005) (38)
High Stereoselectivity in Lewis‐Acid‐Catalyzed and Uncatalyzed Diels–Alder Reactions of the Fumarate of (S)‐Ethyl Lactate (1987) (38)
Synthesis of alpha,beta-unsaturated gamma-lactams via asymmetric iridium-catalysed allylic substitution. (2007) (37)
PD-KOMPLEX-KATALYSIERTE ALLYLISCHE ALKYLIERUNG MIT PHOSPHANYLARYLDIHYDROOXAZOL-LIGANDEN : ERSTER NACHWEIS UND NMR-SPEKTROSKOPISCHE STRUKTURBESTIMMUNG EINES PRIMAREN OLEFIN-PD0-KOMPLEXES (1997) (37)
Diastereoselective oxidative coupling of enolates of chiral carboxylic acid derivatives (1995) (36)
Funktionelle Gruppen in konkaver Lage: Asymmetrische Alkylierung von Estern mit sehr hoher Stereoselektivität und Konfigurationsumkehrung durch Solvensänderung (1981) (35)
EPC-syntheses via asymmetric diels-alder reactions/retro diels-alder reactions I: (R)- and (S)-matsutake alcohol. (R)- and (S)-sarcomycin methyl ester (1987) (35)
New chiral solvating agents for carboxylic acids: discrimination of enantiotopic nuclei and binding properties (1997) (35)
Enantio- und anti-diastereoselektive Aldoladditionen von Acetaten und Propionaten über O-Silylketenacetale (1985) (34)
Enantioselective modular synthesis of cyclohexenones: total syntheses of (+)-crypto- and (+)-infectocaryone. (2010) (33)
Tetracyclines. 10. Chemical-structural properties of tetracycline derivatives. 5. A total synthesis and structural aspects of racemic 8-oxygenated tetracyclines (1979) (32)
Enantioselective Syntheses of Tetrahydroquinolines Based on Iridium-Catalyzed Allylic Substitutions: Total Syntheses of (+)-Angustureine and (–)-Cuspareine (2011) (31)
Gold‐katalysierte intermolekulare Addition von Carbonylverbindungen an 1,6‐Enine (2007) (30)
Building Blocks for the Synthesis of Enantiomerically Pure Jasmonoids: Synthesis of (+)‐Methyl Epijasmonate (1990) (30)
Bicyclic cyclopentenones via the combination of an iridium- catalyzed allylic substitution with a diastereoselective intramolecular Pauson–Khand reaction (2011) (29)
A new synthesis route to enantiomerically pure jasmonoids. (2002) (29)
Chiral phosphinooxazolines with a pentamethylferrocene backbone--synthesis and use as ligands in asymmetric catalysis. (2006) (28)
Asymmetric Diels-Alder reactions: EPC-synthesis of a stable sarkomycin precursor (cyclosarkomycin) (1989) (28)
(Phosphino-oxazoline)copper(II) complexes as chiral catalysts for enantioselective Diels-Alder reactions (1998) (28)
Synthesis of Enantiomerically Pure (−)-Wine Lactone Based on a Palladium-Catalyzed Enantioselective Allylic Substitution (2000) (27)
Enantioselective syntheses of the alkaloids cis-195A (pumiliotoxin C) and trans-195A based on multiple applications of asymmetric catalysis. (2012) (27)
An (η1-Allyl)palladium Complex of a Chiral Bidentate Ligand: Crystallographic and NMR Studies on a (η1-3,3-Diphenylallyl)(phosphinooxazoline)palladium Complex (2002) (26)
Pd‐Catalyzed Asymmetric Allylic Alkylation of 3‐Acetoxy‐N‐(tert‐butyloxycarbonyl)‐1,2,3,6‐tetrahydropyridine – Preparation of Key Intermediates for Natural Product Synthesis (1999) (26)
Gezielte präparative Trennung enantiomerer Carbonsäuren und Lactone via Flüssigkeitschromatographie und nachbargruppenunterstützte Hydrolyse diastereomerer Amide (1979) (26)
Preparative Scale Directed Resolution of Enantiomeric Amines via Liquid Chromatography of Diastereomeric 4-Hydroxybutyramides† (1979) (25)
Synthesis of enantiomerically pure (S)-3-trichloromethylbutyric acid via asymmetric conjugate addition of trichloromethyl metal compounds to a chiral enoate. Activation effect of a sulfonylamino group (1985) (25)
Diastereoselective imino ester cycloadditions. Enantioselective synthesis of azabicyclo[2.2.1]heptenes (1992) (25)
Iridium-catalyzed allylic substitutions with cyclometalated phosphoramidite complexes bearing a dibenzocyclooctatetraene ligand: preparation of (π-allyl)Ir complexes and computational and NMR spectroscopic studies. (2012) (25)
Synthesis and Absolute Configuration of Enantiomerically Pure D3‐Trishomocubanes(Pentacyclo [6.3.0.02,6.03,10.05,9] undecane) and Trishomocubanones (1977) (25)
Highly Enantioselective Rhodium‐Catalyzed Hydrogenation of 2‐(2‐Methoxy‐2‐oxoethyl)acrylic Acid − A Convenient Access of Enantiomerically Pure Isoprenoid Building Blocks (2003) (25)
Herstellung enantiomerenreiner chiraler Alkohole durch asymmetrische Alkylierung von Glykolaten (1984) (24)
Malononitrile as AcylanionEquivalent (2008) (24)
Stereoselective Synthesis of β-Proline Derivatives from Allylamines via Domino Hydroformylation/Wittig Olefination and Aza-Michael Addition (2010) (24)
Synthesis and biological properties of novel brefeldin A analogues. (2013) (24)
Total Syntheses, Optical Rotations and Fragrance Properties of Sandalwood Constituents: (−)‐(Z)‐ and (−)‐(E)‐β‐Santalol and Their Enantiomers, ent‐β‐Santalene (1994) (22)
Determination of the configuration of an archaea membrane lipid containing cyclopentane rings by total synthesis. (2003) (22)
Gezielte präparative Trennung enantiomerer Amine via Flüssigkeitschromatographie diastereomerer 4‐Hydroxybutyramide (1979) (21)
Palladiumkomplex‐katalysierte asymmetrische allylische Substitutionen mit Nitromethan: Enantioselektivität mit ee‐Werten von über 99.9% (1995) (19)
Natural product syntheses based on asymmetric Diels-Alder reactions (1989) (19)
Syntheses and Biological Properties of Brefeldin Analogues (2011) (19)
Bestimmung der absoluten Konfiguration von chiralen Thiolen durch 1H-NMR-Spektroskopie diastereomerer Thiolester†‡ (1976) (19)
Enantiomerically pure C2-symmetric bridged ferrocene and titanocene derivatives (1993) (19)
Highly effective catalysts for the conjugate addition of silyl ketene acetals to enones (Mukaiyama-Michael reaction) (1994) (19)
Hohe Stereoselektivität bei Lewis‐Säure‐katalysierten und bei unkatalysierten Diels‐Alder‐Reaktionen des Fumarsäureesters von (S)‐Ethyllactat (1987) (19)
Syntheses of dictyopterene B (hormosirene) and its enantiomer via asymmetric ScN′ reactions (1985) (18)
Über atropisomere Biphenyl‐Derivate mit einer Pseudoasymmetrieachse (1972) (18)
First enantioselective synthesis of (+)-(3R,3aS,6aS)-3-hydroxy-3,3a,4,6a-tetrahydrocyclopenta[b]furan-2-one — a versatile chiral heterocyclic building block (1998) (18)
A total synthesis of enentiomerically pure vitamin e side chain using a chiral propionate synthon (1983) (18)
Syntheses of Enantiomerically Pure Cyclopent‐2‐ene‐1‐carboxylic Acid and (Cyclopent‐2‐enyl)acetic Acid by Enantioselective Palladium‐Catalyzed Allylic Alkylations − Synthesis of Enantiomerically Pure (−)‐Chaulmoogric Acid (2003) (17)
DIASTEREOSELECTIVE OXIDATIVE COUPLING OF ENOLATES OF 3-PHENYLPROPIONIC ACID DERIVATIVES - EPC SYNTHESIS OF ENT-HINOKININ (2000) (17)
Enantioselektive modulare Synthese von 2,4‐disubstituierten Cyclopentenonen durch Iridium‐katalysierte allylische Alkylierung (2006) (17)
Behavioral activity of optical isomers of 5,9-dimethylheptadecane, the sex pheromone ofLeucoptera scitella L. (Lepidoptera: Lyonetidae) (1989) (17)
Organic Synthesis via Organometallics OSM 5 (1997) (17)
Ein‐ und zweizähnige Phosphinane – neue chirale Liganden und ihr Einsatz in der katalytischen asymmetrischen Hydrierung (2002) (17)
Tripodliganden mit drei verschiedenen Donorgruppen: Synthese und Koordination von CH3C(CH2PR2)(CH2PR′2)(CH2PR"2) / Tripod Ligands with Three Different Donor Groups: Synthesis and Coordination of CH3C(CH2PR2)(CH2PR′2)(CH2PR''2) (1993) (17)
EPC Syntheses with C, C Bond Formation (1986) (16)
Platinum(II) chloride-catalyzed stereoselective domino enyne isomerization/Diels-Alder reaction. (2010) (16)
Enantioselektive allylische Substitution an cyclischen Substraten unter Katalyse mit Palladiumkomplexen von P,N‐Chelatliganden mit Cymantreneinheit (1998) (16)
Über die stereoisomeren α-Phenyläthylamide der Biphenyl-2,2′,6,6′-tetracarbonsäure, Molekeln der Punktsymmetrie D2, S4, C2 und C1 (1973) (15)
Syntheses of New Chiral Phosphane Ligands by Diastereoselective Conjugate Addition of Phosphides to Enantiomerically Pure Acceptor‐Substituted Olefins from the Chiral Pool (2005) (15)
Enantioselective Iridium-Catalyzed Allylic Alkylations - Improvements and Applications Based on Salt-Free Reaction Conditions (2007) (15)
Synthese und absolute Konfiguration der enantiomer reinen D3‐Trishomocubane (Pentacyclo[6.3.0.02,6.O3,10.O5,9]undecan) und Trishomocubanone (1977) (15)
Selective Micellar Catalysis with Histidinyl Surfactants of Defined Absolute Configuration (1981) (15)
Enantioselective Syntheses and Fragrance Properties of the Four Stereoisomers of Magnolione® (Magnolia Ketone) (2005) (15)
Bausteine zur Synthese von enantiomerenreinen Jasmonoiden: Synthese von (+)‐Methylepijasmonat (1990) (14)
Isomerism of (π-1,3-dimethylallyl)(phosphinooxazoline)Pd complexes: a comparison between experiment and theory (2002) (14)
Ein neuartiger chiraler Synthesebaustein mit Neopentangerüst: Chemo‐enzymatische Darstellung von (R)‐CH3C(CH2OSO2CF3)(CH2Cl)(CH2Br) (1994) (14)
Determination of the Absolute Configuration of Chiral Thiols by 1H‐NMR Spectroscopy of Diastereomeric Thiol Esters (1976) (14)
N‐Acyl‐N′‐arylsulfonyldiazene; Nachweis und Verwendung zur Synthese von Amiden (1977) (13)
A SHORT SYNTHESIS OF (-)-CHOKOL A (1995) (13)
Enantioselective Synthesesof 2-Substituted Pyrrolidines from Allylamines by Domino Hydroformylation-Condensation:Short Syntheses of (S)-Nicotine and theAlkaloid 225C (2009) (12)
Enantioselective synthesis of (+)-juvabione. (2000) (12)
Enantioselective Iridium-CatalyzedAllylic Aminations of Allylic Carbonates with Functionalized SideChains. Asymmetric Total Synthesis of (S)-Vigabatrin (2008) (12)
Dibenzo[a,e]cyclooctene: Multi‐gram Synthesis of a Bidentate Ligand (2014) (12)
EPC synthesis of 5-substituted 2-oxo-cyclopentanecarboxylates via conjugate addition of cuprates to asymmetric shielded 2-oxo-cyclopentenecarboxylates (1995) (12)
Enantiomerically Pure 6-Substituted 2-Oxo-cyclohexanecarboxylates by Conjugate Addition of Cuprates to Asymmetric Shielded 2-Oxo-cyclohexenecarboxylates (1995) (12)
Syntheses of the hexahydroindene cores of indanomycin and stawamycin by combinations of iridium-catalyzed asymmetric allylic alkylations and intramolecular Diels-Alder reactions. (2013) (11)
Resolution of (1,1′-binaphthalene)-2,2′-dithiol by enzyme catalysed hydrolysis of a racemic diacyl derivative (1994) (11)
Enantio‐ and Diastereoselective Syntheses of 3‐Hydroxypiperidines through Iridium‐Catalyzed Allylic Substitution (2013) (11)
Enantioselective Syntheses of Bicyclic Lactams Based on Iridium-Catalyzed Asymmetric Allylic Substitution and Heck Cyclization (2014) (11)
Dibenzothiophenesulfilimines: A Convenient Approach to Intermolecular Rhodium‐Catalysed C−H Amidation (2020) (10)
Immobilized catalysts for iridium-catalyzed allylic amination: rate enhancement by immobilization. (2015) (10)
Über 1, 12‐Dioxa‐[12]paracyclophan‐Derivate mit einer Pseudoasymmetrieebene (1972) (10)
Enantioselective syntheses of (-)-(R)-rolipram, (-)-(R)-baclofen and other GABA analogues via rhodium-catalyzed conjugate addition of arylboronic acids (2003) (10)
Structure and Bonding Properties of the Complex (η5-Diphenylfulvene)Mn(CO)3+ (2001) (10)
The 50th Anniversary of the Cahn-Ingold-Prelog Specification of Molecular Chirality. (2016) (9)
Enantioselective total synthesis and absolute configuration of apiosporic acid. (2012) (9)
Iridium‐Catalyzed Asymmetric Allylic Substitutions (2009) (8)
Asymmetric Carbon-Carbon Bond-Forming Reactions (2010) (8)
Lewis acids based on sulfur containing boron heterocycles and trialkylthioboranes (1993) (8)
2-Amino-3-fluorobenzoic acid (2003) (7)
Iridium-Catalyzed Enantioselective Allylic Substitutions with Aliphatic Nitro Compounds as Prenucleophiles (2006) (6)
N‐Acyl‐N′‐arylsulfonyldiazenes; Detection and Use in the Synthesis of Amides (1977) (6)
Synthesis and Application of Complexes of a Novel Chiral Diphenylphosphino-Functionalized N-Heterocyclic Carbene (2004) (6)
Stereoselective Synthesis of a Lactam Analogue of Brefeldin C (2008) (6)
Bekämpfung der Tsetse–Fliege mit Pheromonen (1981) (6)
Iridium‐Catalyzed Asymmetric Allylic Substitutions with Bulky Amines/Oxidative Double Bond Cleavage – Entry into the Reetz Synthesis of Amino Alcohols (2016) (6)
A Novel Route to Iridoids: Enantioselective Syntheses of Isoiridomyrmecin and α-Skytanthine (2002) (5)
Enantiomerically pure chiral building blocks for syntheses of carbocyclic nucleoside analogues: A formal synthesis of aristeromycin (1993) (5)
Stereoselective Synthesis of a cis‐1,2‐Dialkylcyclopentane Building Block and Its Application in Isoprostane Synthesis (5‐ent‐F2c‐IsoP) (2008) (5)
Stereoselective Synthesis: Appendix, Author Index and Compound Index (1996) (5)
Ein neuer Syntheseweg zu enantiomerenreinen Jasmonoiden (2002) (5)
Enantiomers as a result of restricted rotation about partial double bonds: resolution of N-nitroso-, (N-formyl)-, and N-thioformyl-4-piperidinecarboxylic acids. (1978) (4)
Selektive micellare Katalyse mit Histidinyl‐Tensiden definierter absoluter Konfiguration (1981) (4)
Iridium-Catalyzed Enantioselective Allylic Substitutions with Aliphatic Nitro Compounds as Prenucleophiles. (2006) (4)
DIRECTED RESOLUTION OF ENANTIOMERS BY LIQUID CHROMATOGRAPHY OF DIASTEREOMERIC DERIVATIVES. 7. SYNTHESES OF THE STEREOISOMERS OF 17,21-DIMETHYLHEPTATRIACONTANE - SEX RECOGNITION PHEROMONE OF THE TSETSE FLY (1980) (4)
Iridium‐Catalyzed Asymmetric Allylic Substitutions — Very High Regioselectivity and Air Stability with a Catalyst Derived from Dibenzo[a,e]cyclooctatetraene and a Phosphoramidite. (2009) (3)
BASES OF THE CIP SYSTEM AND PROPOSAL FOR A REVISION (1982) (3)
Cyclopentanoid Natural Products via Asymmetric Diels-Alder Reactions (1992) (3)
Syntheses of enantiomerically pure ent-multifidene and related compounds (1993) (3)
Total Syntheses, Optical Rotations and Fragrance Properties of Sandalwood Constituents: (-)-(Z)- and (-)-(E)-β-Santalol and Their Enantiomers, ent-β-Santalene. (1994) (3)
Iridium‐Catalyzed Allylic Vinylation and Asymmetric Allylic Amination Reactions with o‐Aminostyrenes. (2012) (3)
Enantioselective formal synthesis of brefeldin a and analogues via anionic cyclization of an alkenyl epoxide (2006) (3)
HIGHLY ENANTIOSELECTIVE HOMOALDOL ADDITION WITH CHIRAL N-ALLYLUREAS - USE FOR THE SYNTHESIS OF OPTICALLY PURE Γ-LACTONES (1985) (3)
4.1. Formation of C—O Bonds by Oxygenation of Enolates (1995) (3)
Discussion Addendum for: Dibenzo[a,e]cyclooctene: Multigram Synthesis of a Bidentate Ligand (2020) (3)
50 Jahre Spezifikation der molekularen Chiralität durch Cahn, Ingold und Prelog (2016) (2)
1. Nomenclature and Vocabulary of Organic Stereochemistry: 1.3. Glossary of Problematic Terms and Terms Not to be Used (1995) (2)
1.3.4. Formation of C–C Bonds by Addition of Enolates to Carbonyl Groups (II) (1995) (2)
3. Determination of Enantiomeric Purity: 3.1. Determination of Enantiomeric Purity by Direct Methods (III) (1995) (2)
Catalysts in Synthesis (2014) (2)
Enantioselective synthesis of (-)-(R)-Baclofen and analogues via rhodium-catalysed conjugate addition of boronic acids (2003) (2)
3. Determination of Enantiomeric Purity: 3.2. Determination of Enantiomeric Purity via Formation of Diastereomers (III) (1995) (2)
Total Syntheses of Sandalwood Fragrances: (Z)- and (E)-β-Santalol and Their Enantiomers, ent-β-Santalene. (1990) (2)
A TOTAL SYNTHESIS OF ENANTIOMERICALLY PURE VITAMIN E SIDE CHAIN USING A CHIRAL PROPIONATE SYNTHON (1983) (2)
Ir‐Catalyzed Asymmetric Allylic Substitution Reactions – Fundamentals and Applications in Natural Products Synthesis (2014) (2)
UEBER EINE NEUE METHODE ZUR BESTIMMUNG DER ABSOLUTEN KONFIGURATION VON CHIRALEN SEKUNDAEREN ALKOHOLEN UND AMINEN, NMR-SPEKTROSKOPIE VON DIASTEREOMEREN ESTERN UND AMIDEN DER ALPHA-PHENYLBUTTER- UND HYDRATROPASAEURE (1974) (1)
Gold-Catalyzed Addition of Aldehydes to 1,6-Enynes (2007) (1)
7. Organometallic Compounds (1996) (1)
7.1. Formation of C—N Bonds by Electrophilic Amination (1995) (1)
4. Determination of Absolute and Relative Configuration: 4.3. Determination of Absolute and Relative Configuration Using Chemical Methods (III) (1995) (1)
Preparation of Chiral Phosphorus, Sulfur and Selenium Containing 2- Aryloxazolines. (1996) (1)
4. Determination of Absolute and Relative Configuration: 4.1. Determination of Relative Configuration by Nuclear Magnetic Resonance Methods (III) (1995) (1)
Ir-Catalyzed Allylic Amination and Etherification (2005) (1)
C2-Symmetric Bioxazolines and Bithiazolines as New Chiral Ligands for Metal Ion Catalyzed Asymmetric Syntheses: Asymmetric Hydrosilylation. (1992) (1)
Phosphinoaryl‐ and Phosphinoalkyloxazolines as New Chiral Ligands for Enantioselective Catalysis: Very High Enantioselectivity in Palladium‐ Catalyzed Allylic Substitutions. (1993) (1)
Catalytic Asymmetric Hydrosilylation of Ketones Using Rhodium‐(I)‐ Complexes of Chiral Phosphinooxazoline Ligands. (1996) (1)
4. Determination of Absolute and Relative Configuration: 4.2. Determination of Absolute and Relative Configuration by X-ray and Neutron Diffraction Methods (1995) (1)
(η3-Phenylallyl)(phosphanyloxazoline)palladium Complexes: X-Ray Crystallographic Studies, NMR Investigations, and Ab Initio/DFT Calculations (Phosphanyloxazoline)palladium Complexes, Part II. Part I see: ref. 5. (2002) (1)
4.9. Formation of C—O Bonds by Allylic Oxidation with Singlet Molecular Oxygen (1995) (1)
Enantioselective Allylic Substitutions with Hydroxamic AcidDerivatives (2011) (1)
Prüfung von Hochspannungsschaltern (1953) (1)
3.2. Electrophilic Halogenation: 3.2.4 Halogenation of Organometallic Compounds (1995) (0)
1.5.4: 1.5.4.1. Intermolecular Reactions (1995) (0)
Highly Effective Catalysts for the Conjugate Addition of Silyl Ketene Acetals to Enones (Mukaiyama‐Michael Reaction). (1994) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (IV) (1995) (0)
Iridium-Catalyzed, Enantioselective, Allylic Alkylations With Carbon Nucleophiles (2019) (0)
Index E 21 : Part 1 Bicyclic Compounds (III) (1996) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (VI) (1995) (0)
Enantioselective Catalysis with Complexes of Asymmetric P,N‐Chelate Ligands (1997) (0)
1.6.2: 1.6.2.2. C–X Double Bond Systems as Eneophiles (1995) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (III) (1995) (0)
2. Basic Principles of EPC Synthesis: 2.4. Industrial Applications (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XIV) (1995) (0)
7.3. Formation of C—N Bonds by Conjugate Addition of N-Nucleophiles (III) (1995) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (VI) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XIV) (1995) (0)
1.5.5: 1.5.5.4. Transannular Carbenium Ion Olefin Cyclizations (1995) (0)
FUNCTIONAL GROUPS IN CONCAVE POSITIONS: ASYMMETRIC DIELS-ALDER SYNTHESIS WITH ALMOST COMPLETE (LEWIS ACID CATALYZED) OR HIGHER (UNCATALYZED) STEREOSELECTIVITY (1981) (0)
1.5.4: 1.5.4.2. Cyclization (II) (1995) (0)
1.4.2. Addition of Allylic and Allenic Organometallic Compounds to Imino Groups (1995) (0)
Iridium-Catalyzed Asymmetric Synthesis of 2,6-DisubstitutedPiperidines (2009) (0)
Index E 21 : Part 1 Bicyclic Compounds (IV) (1996) (0)
Index E 21 : Part 1 Bicyclic Compounds (I) (1996) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (XI) (1995) (0)
2.1.Protonation of Carbanions and Polar Double Bonds: 2.1.2 Diastereoselective Protonation of Carbanions (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (III) (1995) (0)
Synthesis of Dictyopterene B (Hormosirene) and Its Enantiomer via Asymmetric SNReactions. (1985) (0)
Synthesis of Enantiomerically Pure (S)-3-Trichlorometliylbutyric Acid via Asymmetric Conjugate Addition of Trichloromethyl Metal Compounds to a Chiral Enoate. (1986) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (X) (1995) (0)
Resolution of (1,1′-Binaphthalene)-2,2′-dithiol by Enzyme Catalyzed Hydrolysis of a Racemic Diacyl Derivative (2010) (0)
1.5.1. Vinylogous Substitution Reactions (I) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XXI) (1995) (0)
Enantiomerically Pure C2‐Symmetric Bridged Ferrocene and Titanocene Derivatives. (1993) (0)
Diastereoselective Imino Ester Cycloadditions. Enantioselective Synthesis of Azabicyclo(2.2.1)heptenes. (1992) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (I) (1995) (0)
Index E 21 : Part 1 Biaryl Compounds (1996) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XVII) (1995) (0)
Book Review: Physikalische Organische Chemie (Physical Organic Chemistry). Reaction Rates, Equilibria, Mechanisms. By L. P. Hammett (1974) (0)
3.2. Electrophilic Halogenation: 3.2.2 Halogenation of Alkenes and Alkynes (1995) (0)
A Novel Route to Iridoids: Enantioselective Syntheses of Isoiridomyrmecin and α-Skytanthine. (2003) (0)
6.2. Formation of C—Te Bonds (1995) (0)
Synthesis of (+)(R)- and (-)(S)-Nicotine via Enantioselective Ir-Catalyzed Allylic Amination (2006) (0)
Chiral Phosphinooxazolines with a Bi- or Tricyclic Oxazoline Moiety — Applications in Pd-Catalyzed Allylic Alkylations. (2010) (0)
2.3 Reduction of Carbonyl Groups: 2.3.3 Formation of C-H Bonds by the Reduction of Carbonyl Groups with Metal Hydrides (VI) (1995) (0)
7.5. Formation of C—N Bonds by Allylic Amination (1995) (0)
8.2. Addition of P(III) Compounds to Carbonyl Compounds (1995) (0)
2.4 Reduction of Imino Groups: 2.4.1 Catalytic Hydrogenation and Hydrosilylation (1995) (0)
4.3 Formation of C—O Bonds via Hydrosilylation of Olefinic Double Bonds Followed by Oxidation (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XV) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XVI) (1995) (0)
Definition of the term asymmetric synthesis-History and revision. (2023) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (VI) (1995) (0)
1.6.1: 1.6.1.5. Formation of C–C Bonds by [2 + 1] Cycloadditions (I) (1995) (0)
Asymmetric Allylic Substitutions with Palladium Complexes of Phosphinooxazolines as Ligands — Preparative and Mechanistic Aspects. (2002) (0)
Enantioselective Diels-Alder Reactions of Enals: Fighting Species Multiplicity of the Catalyst with Donor Solvents. (1991) (0)
Stereoselection at 3-Carbon Units. Recent Studies and Applications in Natural Product Synthesis (1986) (0)
Stereoselective Synthesis: C—C Bond Formation by Addition to C=O, C=N and Reactions Involving Olefinic Double Bonds (1995) (0)
Stereoselective Synthesis: Bond Formation, C—N, C—O, C—P, C—S, C—Se, C—Si, C—Sn, C—Te (1995) (0)
1.4.4. Formation of C–C Bonds by Addition to Imino Groups via Strecker and Ugi Reactions (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (VII) (1995) (0)
1.6.1: 1.6.1.4. Formation of C–C Bonds by Light-Induced [2 + 2] Cycloadditions (III) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XV) (1995) (0)
Platinum(II) Chloride‐Catalyzed Stereoselective Domino Enyne Isomerization/Diels—Alder Reaction. (2011) (0)
1.5.2. Formation of C–C Bonds by Addition to α,β-Unsaturated Carbonyl Compounds (III) (1995) (0)
2.4 Reduction of Imino Groups: 2.4.4 C - H Hydride Donors (1995) (0)
Stereoselective Synthesis of β-Proline Derivatives from Allylamines via Domino Hydroformylation/Wittig Olefination and Aza-Michael Addition. (2010) (0)
1.3.6. Formation of C–C Bonds by Addition of Metalated Sulfoxides or Sulfoximides to Carbonyl Groups (1995) (0)
8. Phosphorus Compounds (1996) (0)
Comprar Asymmetric Synthesis with Chemical and Biological Methods | Dieter Enders | 9783527314737 | Wiley (2007) (0)
3.2. Electrophilic Halogenation: 3.2.6 Other Halogenations (1995) (0)
8.6. Reactions of Diphosphenes (1995) (0)
Enantio‐ and anti‐Diastereoselective Aldol Additions of Acetates and Propionates via O‐Silyl Ketene Acetals. (1986) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (VIII) (1995) (0)
1.5.8: 1.5.8.4. Additions with C–C/C–Heteroatom Bond Formation (Heterocarboration) (II) (1995) (0)
1.5.5: 1.5.5.3. Carbenium Ion Olefin Cyclization (II) (1995) (0)
1.5.5: 1.5.5.1. Carbenium Ion Addition to Simple Alkenes (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (IX) (1995) (0)
4.8. Formation of C—O Bonds by Microbial Insertion of Oxygen into C—H Bonds (III) (1995) (0)
3.2. Electrophilic Halogenation: 3.2.3 Haloetherification and Lacton(am)ization (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XVI) (1995) (0)
9. Formation of C—Si Bonds (1995) (0)
3.2. Electrophilic Halogenation: 3.2.5 Halogenation of Organoboranes (1995) (0)
1. Nomenclature and Vocabulary of Organic Stereochemistry: 1.1. Static Stereochemistry (II) (1995) (0)
8.4. Reactions in α-Position to Carbonyl Groups (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (IV) (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (XIII) (1996) (0)
1.5.3. Formation of C–C Bonds by Addition to Olefinic Double Bonds; Enimines, Nitroalkenes, 4,5-Dihydrooxazoles, α,β-Unsaturated Sulfones, Sulfoxides and Sulfoximines (II) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (VIII) (1995) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (V) (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (VIII) (1996) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (X) (1995) (0)
2.5 Reduction of Olefinic Double Bonds 2.5.2 Formation of C - H Bonds by Reduetion of Olefinic Double Bonds via Hydroboration and Hydroalumination (1995) (0)
Enantioselective Synthesis of Cyclohexenones (2010) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (X) (1995) (0)
1.3.5. Formation of C–C Bonds by Addition of Azaenolates or Nitronates to Carbonyl Groups (II) (1995) (0)
2. Alkaloids, Amino A1cohols, and Amino Acids. Their Derivatives and Related Compounds (III) (1996) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XII) (1995) (0)
EPC‐Syntheses via Symmetric Diels‐Alder Reactions/Retro‐Diels‐Alder Reactions. Part 1. (R)‐ and (S)‐Matsutake Alcohol, (R)‐ and (S)‐Sarcomycin Methyl Ester. (1987) (0)
1.3.2. Formation of C–C Bonds by Addition of Benzyl-Type Organometallic Compounds to Carbonyl Groups (1995) (0)
9. Sulfur Compounds (1996) (0)
2.4 Reduction of Imino Groups: 2.4.3 Reductions with Metals (1995) (0)
N-ACYL-N′-ARYLSULFONYLDIAZENES, DETERMINATION AND USE IN THE SYNTHESIS OF AMIDES (1978) (0)
Air-Stable Iridium Catalyst in Asymmetric Allylic Substitution (2008) (0)
Process for obtrencion of n-acyl-3,4-dehidropolina and acid derivatives n-acyl-3,4-dehidropiperidin-2-carboxylic acid. (2000) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (VI) (1995) (0)
Index E 21 : Part 1 Steroids (1996) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XVI) (1995) (0)
2.4 Reduction of Imino Groups: 2.4.2 Reductions with Complex Hydride Reagents (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (II) (1995) (0)
1.5.8: 1.5.8.2. Additions with C–C/C–H Bond Formation (Hydrocarboration) (III) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XV) (1995) (0)
Andreas Pfaltz: on the Occasion of his 60th Birthday (2008) (0)
3.1.Halogenation of Alcohols and Alcohol Derivatives: 3.1.1 Fluorination (1995) (0)
Lewis Acids Based on Sulfur Containing Boron Heterocycles and Trialkylthioboranes. (1993) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (IV) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XIII) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XVII) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (III) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XVIII) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XXII) (1995) (0)
Diastereoselective Oxidative Coupling of Enolates of 3-Phenylpropionic Acid Derivatives - EPC Synthesis of ent-Hinokinin. (1997) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (VII) (1995) (0)
High Stereoselectivity in Lewis Acid Catalyzed and Non-Catalyzed Diels-Alder Reactions of the Fumaric Acid Ester of (S)-Ethyllactate. (1988) (0)
2. Biaryls: 2.3. Asymmetrie Induetion Independent from the Coupling Step (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (XII) (1996) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XIX) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (V) (1995) (0)
1.5.6: 1.5.6.2. Enol Derivatives of Monocarbonyl Compounds or Aza-Analogs and a-Allylpalladium Complexes (1995) (0)
1.5.6: 1.5.6.1. Soft Carbanions and S-Allylpalladium Complexes (III) (1995) (0)
Syntheses of Enantiomerically Pure ent-Multifidene and Related Compounds. (2010) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XXII) (1995) (0)
1.4.5. Formation of C–C Bonds by Addition to Imino Groups via N-Acyliminium Ions (III) (1995) (0)
Synthesis and Application of Complexes of a Novel Chiral Diphenylphosphino-Functionalized N-Heterocyclic Carbene. (2005) (0)
Highly Efficient New Catalysts for Enantioselective Transfer Hydrogenation of Ketones. (1996) (0)
2-Amino-3-fluorobenzoic Acid [Benzoic acid, 2-amino-3-fluoro] (2002) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (VIII) (1995) (0)
N-Substituted Hydroxysuccinimides from (S)-Malic Acid as New Reagents for Asymmetric Diels-Alder Additions to Enoates. (1990) (0)
Bicyclic Cyclopentenones via the Combination of an Iridium‐Catalyzed Allylic Substitution with a Diastereoselective Intramolecular Pauson—Khand Reaction. (2011) (0)
2.1.Protonation of Carbanions and Polar Double Bonds: 2.1.5 Diastereoselective Protonation of Ketenes by Addition of Chiral Alcohols (1995) (0)
A new chiral solvating agent for carboxylic acids based on directed hydrogen bonding (2010) (0)
7.4. Formation of C—N Bonds by Allylic Substitution Catalyzed by Palladium Complexes (II) (1995) (0)
Enantiomerically Pure 5-Substituted 2-Oxo-cyclopentanecarboxylates by Conjugate Addition of Cuprates to Asymmetric Shielded 2-Oxo- cyclopentenecarboxylates. (1996) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XX) (1995) (0)
2. Asymmetrie Reaetions Involving Enantiotopie and Diastereotopie Funetional Groups: 2.3. Oxidation of Diols (1995) (0)
1.6.1: 1.6.1.1. [4 + 2] Cycloadditions (VIII) (1995) (0)
Tripod Ligands with Three Different Donor Groups: Synthesis and Coordination of CH3C(CH2PR2)(CH2PR′2)(CH2PR′′2). (2010) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (XII) (1995) (0)
2. Biaryls: 2.1. Intermolecular Stereoselective Aryl Coupling (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (XIV) (1996) (0)
1. Allenes: 1.2. Simple Diastereoselectivity (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XVIII) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XIV) (1995) (0)
Stereoselective Synthesis: C—C Bond Formation by Addition to C=C, Cycloaddition Reactions, Ene Reactions (1995) (0)
Synthesis of Enantiomerically Pure (-)-Wine Lactone Based on a Palladium-Catalyzed Enantioselective Allylic Substitution. (2000) (0)
2.2 Radical Reactions: 2.2.1 Acyc1ic Radicals (1995) (0)
3.2. Electrophilic Halogenation: 3.2.1 Halogenation of Enols and Enolates (1995) (0)
1. Nomenclature and Vocabulary of Organic Stereochemistry: 1.2. Stereoselectivity and Stereodifferentiation (II) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XXIII) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (IV) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XIX) (1995) (0)
A New Chiral Solvating Agent for Carboxylic Acids Based on Directed Hydrogen Bonding. (1995) (0)
1.3.1. Addition of σ-Type Organometallic Compounds (VIII) (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XII) (1995) (0)
Pd‐Catalyzed Asymmetric Allylic Alkylation of 3‐Acetoxy‐N‐(tert‐butyloxycarbonyl)‐1,2,3,6‐tetrahydropyridine — Preparation of Key Intermediates for Natural Product Synthesis. (2000) (0)
1. Asymmetrie Reaetions Involving Enantiotopie and Diastereotopie Hydrogen Atoms: 1.1. Deprotonation (1995) (0)
2.1.Protonation of Carbanions and Polar Double Bonds: 2.1.9 Enantioselective Protonation of Ketenes by the Addition of Alcohols and Thiols (1995) (0)
N-Heterocyclic Carbenes for Conjugate Additions of Arylboronic Acids (2006) (0)
Index E 21 : Part 1 Bicyclic Compounds (XVI) (1996) (0)
2. Basic Principles of EPC Synthesis: 2.2. Ex-Chiral-Pool Synthesis (1995) (0)
Index E 21 : Part 1 Cyclic Compounds Monocyclic Compounds (VIII) (1996) (0)
2.4 Reduction of Imino Groups: 2.4.5 Enzyme-Catalyzed and Biomimetic Reductions (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XI) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XX) (1995) (0)
EPC Synthesis of 5-Substituted 2-Oxo-cyclopentanecarboxylates via Conjugate Addition of Cuprates to Asymmetric Shielded 2-Oxo- cyclopentenecarboxylates. (2010) (0)
2.1.Protonation of Carbanions and Polar Double Bonds: 2.1.4 Diastereoselective Protonation of Nitrogen-Containing Anions (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (VII) (1995) (0)
4.10. Formation of C—O Bonds by Allylic Oxidation with Selenium(IV) Oxide (1995) (0)
Synthesis and Application of the First Chiral and Highly Lewis Acidic Silyl Cationic Catalyst. (1998) (0)
7.6. Formation of C—N Bonds by Sigmatropic Rearrangements (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (X) (1995) (0)
1.6.2: 1.6.2.1. C–C Double and Triple Bond Systems as Eneophiles (1995) (0)
Enantioselective Domino Heck-Allylic Amination Reactions. (1999) (0)
New Chiral β-Phosphinocarboxylic Acids and Their Application in Palladium-Catalyzed Asymmetric Allylic Alkylations. (1996) (0)
Index E 21 : Part 1 Allenes (1996) (0)
Index E 21 : Bicyclic Compounds (VI) (1996) (0)
5.2. Carbon–Sulfinyl Sulfur Bond Formation (1995) (0)
Asymmetric Two‐Center Catalysis ‐ Learning from Nature (1997) (0)
1.5.8: 1.5.8.1. General Principles of Stereoselection in Organometallic Addition Reactions and Catalysis (1995) (0)
2.6 [l,n] Sigmatropic Rearrangements 2.6.3 Conclusions (1995) (0)
FUNCTIONAL GROUPS IN CONCAVE POSITIONS: ASYMMETRIC ALKYLATION OF ESTERS WITH VERY HIGH STEREOSELECTIVITY AND CONFIGURATION INVERSION BY CHANGE OF SOLVENT (1981) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XXIV) (1995) (0)
4.6 Formation of C—O Bonds by Cyclization onto Olefinic Double Bonds Forming Lactones and Ethers (III) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (IX) (1995) (0)
1.4.3. Addition of Enolates and Related Compounds to Imino Groups (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XI) (1995) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (IX) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (V) (1995) (0)
8.1. Addition of P(III) Compounds to C—C Multiple Bonds (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (VII) (1996) (0)
Index E 21 : Part 1 Bicyclic Compounds (IX) (1996) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XIII) (1995) (0)
Enantioselective Allylic Amination with Chiral (Phosphinooxazoline)Pd Catalysts. (1994) (0)
2.1.Protonation of Carbanions and Polar Double Bonds: 2.1.1 Formation of Prostereogenic Carbanions (1995) (0)
4.11. Formation of C—O Bonds by Sigmatropic Rearrangements (III) (1995) (0)
6.1. Formation of C—Se Bonds (II) (1995) (0)
PRECISION SEPARATION OF ENANTIOMERS BY LIQUID CHROMATOGRAPHY OF DIASTEREOMERIC DERIVATIVES. 4. EXTREME LIQUID CHROMATOGRAPHIC SEPARATION EFFECTS BY DIASTEREOMERIC AMIDES WITH POLAR SUBSTITUENTS (1979) (0)
Asymmetric Diels-Alder Reactions: EPC-Synthesis of a Stable Sarkomycin Precursor. (1990) (0)
5.1. Carbon–Sulfenyl Sulfur Bond Formation (II) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (I) (1995) (0)
4. A1cohols, Carbohydrates, Hydroxy Acids, and Their Derivatives (II) (1996) (0)
Stereoselective Synthesis: C—C Bond Formation by Sigmatropic Rearrangements, Electrocyclic Reactions, C—H, C—Hal Bond Formation (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XVII) (1995) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (VIII) (1995) (0)
SYNTHESIS AND ABSOLUTE CONFIGURATION OF THE ENANTIOMERS OF PURE D3‐TRIS(HOMOCUBANES) (PENTACYCLO(6.3.0.02,6.03,10.05,9)UNDECANE) AND TRIS(HOMOCUBANONES) (1977) (0)
MECHANISM OF THE ASYMMETRIC DIELS-ALDER REACTION: INITIAL CRYSTAL-STRUCTURE ANALYSIS OF A LEWIS ACID COMPLEX OF A CHIRAL DIENOPHILE (1985) (0)
4.4. Formation of C—O Bonds by 1,2-Dihydroxylation of Olefinic Double Bonds (III) (1995) (0)
10. Formation of C—Sn Bonds (1995) (0)
2.3 Reduction of Carbonyl Groups: 2.3.1 Hydrogenation with Molecular Hydrogen (1995) (0)
Salt-Free Enantioselective Iridium-Catalyzed Allylic Alkylations (2007) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (IX) (1995) (0)
ATROPISOMERE BIPHENYL-DERIVATE MIT EINER PSEUDOASYMMETRIEACHSE (1973) (0)
Physikalische Organische Chemie. Reaktionsgeschwindigkeiten, Gleichgewichte, Mechanismen. Von L. P. Hammett. Verlag Chemie, Weinheim 1973. VIII, 413 S., zahlr. Abb. und Tab., geb. DM 59.— (1974) (0)
3.1.Halogenation of Alcohols and Alcohol Derivatives: 3.1.3 Bromination and Iodination (1995) (0)
Catalysis of Allylic Substitutions by Pd Complexes of Oxazolines Containing an Additional P, S, or Se Center. X-Ray Crystal Structures and Solution Structures of Chiral π-Allyl Palladium Complexes of Phosphinoaryloxazolines. (1994) (0)
8.3. Addition of P(III) Compounds to the C—N Double Bond (1995) (0)
First Enantioselective Synthesis of (+)‐(3R,3aS,6aS)‐3‐Hydroxy‐3,3a,4,6a‐tetrahydrocyclopenta[b]furan‐2‐one — A Versatile Chiral Heterocyclic Building Block. (1998) (0)
Palladium Complex Catalyzed Asymmetric Allylic Substitutions with Nitromethane: Enantioselectivities Exceeding 99.9% e.e. (1996) (0)
PRECISION SEPARATION OF ENANTIOMERS BY LIQUID CHROMATOGRAPHY OF DIASTEREOMERIC DERIVATIVES. 6. PRECISION PREPARATIVE SEPARATION OF ENANTIOMERIC AMINES BY LIQUID CHROMATOGRAPHY OF DIASTEREOMERIC 4‐HYDROXYBUTYRAMIDES (1979) (0)
Moderne Simulation fuer das Training von Fahrpersonal von Schienen- und Radfahrzeugen (2003) (0)
Enantioselective Syntheses of Bicyclic Lactams Based on Iridium‐Catalyzed Asymmetric Allylic Substitution and Heck Cyclization. (2015) (0)
2.4 Reduction of Imino Groups: 2.4.6 Electrochemical Reductions (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XII) (1995) (0)
GEZIELTE TRENNUNG UND ABSOLUTE KONFIG. VON ENANTIOMEREN CARBONSAEUREN UND AMINEN 1. MITT. (1973) (0)
1.6.1: 1.6.1.2. Formation of C–C Bonds by [3 + 2] Cycloadditions (III) (1995) (0)
1,12-DIOXA-(12)PARACYCLOPHAN-DERIVATE MIT EINER PSEUDOASYMMETRIEEBENE (1973) (0)
Selektive micellare Katalyse mit Histidinyl‐Tensiden definierter absoluter Konfiguration. (1982) (0)
3. Terpenes. Their Derivatives and Analogs (III) (1996) (0)
Enantiomerically Pure Chiral Building Blocks for Syntheses of Carbocyclic Nucleoside Analogues: A Formal Synthesis of Aristeromycin. (1994) (0)
2.3 Reduction of Carbonyl Groups: 2.3.2 Formation of C-H Bonds by the Reduction of C-C Double Bonds and of Carbonyl Groups with Metals ('Dissolving Metal Reduction') (1995) (0)
Bestimmung der absoluten Konfiguration von chiralen Thiolen durch1H-NMR-Spektroskopie diastereomerer Thiolester. (1977) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (I) (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XIX) (1995) (0)
1.4.1. Addition of σ-Type Organometallic Compounds to Imino Groups (III) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XVIII) (1995) (0)
Gezielte Trennung von Enantiomeren via Flüssigkeitschromatographie diastereomerer Derivate. 5. Mitt. Gezielte präparative Trennung enantiomerer Carbonsäuren und Lactone via Flüssigkeitschromatographie und nachbargruppenunterstützte Hydrolysediastereomerer Amide. (1979) (0)
1. Allenes: 1.1. Chirality Transfer (1995) (0)
Enantioselective Diels-Alder Additions with New Chiral Lewis Acids Derived from Amino Acids. (1990) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (III) (1995) (0)
Enantiomerically Pure Cycloalkenylacetic Acid Derivatives via Pd‐ Catalyzed Asymmetric Allylic Alkylation and Subsequent Enantiomeric Enrichment via Iodolactones. (1995) (0)
Sich „richtig aufstellen” - doch Humboldt dreht sich im Grabe um (1998) (0)
1.5.7. Formation of C–C Bonds by Hydroboration of Olefinic Double Bonds (1995) (0)
CCDC 696065: Experimental Crystal Structure Determination (2010) (0)
Bestimmung der Konfiguration eines Cyclopentanringe enthaltenden Archaea‐Membranlipids durch Totalsynthese (2003) (0)
(Phosphino‐oxazoline)copper(II) Complexes as Chiral Catalysts for Enantioselective Diels—Alder Reactions. (1998) (0)
Stereoselective Synthesis: Nomenclature, Principles, Analytic, Axially Chiral Compounds, Bond Disconnection, Alkylation Reaction, Insertion into C–H Bonds (1995) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (XIII) (1995) (0)
1.5.5: 1.5.5.2. The Prins Reaction (1995) (0)
Synthons for the Preparation of Enantiomerically Pure Jasmonoids: Synthesis of (+)‐Methyl Epijasmonate. (1990) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (XI) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (XXI) (1995) (0)
First Enantioselective Alkylations of Monosubstituted Allylic Acetates Catalyzed by Chiral Iridium Complexes. (1998) (0)
4.1 Introduction: General Concepts (2012) (0)
2.6 [l,n] Sigmatropic Rearrangements 2.6.1 Seope and Limitations (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (II) (1995) (0)
2. Basic Principles of EPC Synthesis: 2.3. Stereoselective Bond Formation (1995) (0)
Diastereoselective Oxidative Coupling of Enolates of Chiral Carboxylic Acid Derivatives. (1995) (0)
1.3.7. Formation of C–C Bonds by Enzyme-Catalyzed Hydrocyanation of Carbonyl Groups (1995) (0)
7.2. Formation of C—N Bonds by Addition to Olefinic Double Bonds (V) (1995) (0)
1. Allenes: 1.3. Enantio- and Diastereoselective Reactions (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (XV) (1996) (0)
2. Asymmetrie Reaetions Involving Enantiotopie and Diastereotopie Funetional Groups: 2.1. Nonenzymatic Methods (1995) (0)
Enantioselective catalysis with complexes of asy m metric I? N-c h el at e I i g a n ds (1997) (0)
Enantioselective Allylic Substitutions with Aliphatic Nitro Compounds (2006) (0)
4.5. Formation of C—O Bonds by Epoxidation of Olefinic Double Bonds (III) (1995) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (VII) (1995) (0)
Index E 21 : Part 1 Bicyclic Compounds (II) (1996) (0)
2. Basic Principles of EPC Synthesis: 2.1. EPC Synthesis by Optical Resolution (1995) (0)
(11bS)‐N,N‐Bis[(S)‐1‐(2‐methoxyphenyl)ethyl]dinaphtho[2,1‐d:1′,2′‐f][1,3,2]dioxaphosphepin‐4‐amine (2012) (0)
2.6 [l,n] Sigmatropic Rearrangements 2.6.2 Speeifie [l,n] Sigmatropie Hydrogen Shifts (II) (1995) (0)
Index E 21 : Part 1 Open-Chain Compounds (VIII) (1996) (0)
1.6. Pericyclic Reactions: 1.6.3 Sigmatropic Rearrangements and Electrocyclic Reactions (I) (1995) (0)
1.5.6: 1.5.6.3. Organometallic Compounds and i-Allylpalladium Complexes (1995) (0)
8.5. Cycloaddition of Phosphaalkenes (1995) (0)
1.3.3. Formation of C–C Bonds by Addition of Allyl-Type Organometallic Compounds to Carbonyl Compounds (II) (1995) (0)
1.6.1: 1.6.1.3. Thermally Induced (2 2) Cycloadditions (1995) (0)
DIASTEROFACE‐DISCRIMINATIVE METAL COORDINATION IN ASYMMETRIC SYNTHESIS: D‐PANTOLACTONE AS PRACTICAL CHIRAL AUXILIARY FOR LEWIS ACID CATALYZED DIELS‐ALDER REACTIONS (1985) (0)
Index E 21 : Part 1 Bicyclic Compounds (XI) (1996) (0)
2. Biaryls: 2.2. Intramolecular Stereoselective Aryl Coupling (1995) (0)
2.5 Reduction of Olefinic Double Bonds 2.5.1 Formation of C-H Bonds by Hydrogenation (VI) (1995) (0)
2.1.Protonation of Carbanions and Polar Double Bonds: 2.1.7 Enantioselective Protonation of Enamines (Deracemization of Carbonyl Compounds) (1995) (0)
Enantioselective Allylic Aminations (2006) (0)
PREPARATION OF ENANTIOMER‐PURE CHIRAL ALCOHOLS BY ASYMMETRIC ALKYLATION OF GLYCOLATES (1984) (0)
Index E 21 : Part 1 Bicyclic Compounds (X) (1996) (0)
A Short Synthesis of (-)-Chokol A. (2010) (0)
1. Formation of C–C Bonds: 1.1 Formation of C–C Bonds by Alkylation Reactions (II) (1995) (0)

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What Schools Are Affiliated With Günter Helmchen?

Günter Helmchen is affiliated with the following schools:

University of Göttingen
Ruhr University Bochum
University of Würzburg
Heidelberg University