Hans Martin R. Hoffmann

Hans Martin R. Hoffmann's AcademicInfluence.com Rankings

Chemistry

#3091

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#4079

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Organic Chemistry

#484

World Rank

#561

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chemistry Degrees

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Chemistry

Hans Martin R. Hoffmann's Degrees

Masters Chemistry Stanford University
Bachelors Chemistry University of California, Berkeley

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Hans Martin R. Hoffmann's Published Works

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Published Works

Synthesis and Biological Activity of α‐Methylene‐γ‐butyrolactones (1985) (526)
The Ene Reaction (1969) (356)
The Cycloaddition of Allyl Cations to 1,3‐Dienes: General Method for the Synthesis of Seven‐Membered Carbocycles. New Synthetic Methods (40) (1984) (204)
DABCO-catalyzed coupling of aldehydes with activated double bonds. 4. Stereoselective synthesis of trisubstituted olefins and terpenoid building blocks via 2-(hydroxyalkyl)-2-propenoic esters (1985) (163)
Preparation of 2‐(1‐Hydroxyalkyl)acrylic Esters; Simple Three‐Step Synthesis of Mikanecic Acid (1983) (149)
Die En‐Reaktion (1969) (141)
Syntheses of Seven‐ and Five‐Membered Rings from Allyl Cations (1973) (131)
α‐Methylidene‐ and α‐Alkylidene‐β‐lactams from Nonproteinogenic Amino Acids (1991) (126)
8-Oxabicyclo[3.2.1]oct-6-en-3-ones: application to the asymmetric synthesis of polyoxygenated building blocks. (2004) (107)
Recent Advances in Cinchona Alkaloid Chemistry (2004) (89)
N-METHOXY-N-METHYLAMIDES (WEINREB AMIDES) IN MODERN ORGANIC SYNTHESIS (1997) (80)
Stereospecific generation of 2-oxyallylic cations from two new sources. Steric course of cycloaddition to conjugated dienes (1972) (71)
Loss of allyl cation configuration in cycloadditions to electron-rich conjugated dienes (1979) (71)
Synthesis and reactions of .alpha.-methylene-.beta.-keto sulfones (1991) (69)
1,4‐Diazobicyclo[2.2.2]octane‐catalyzed coupling of aldehydes and activated double bonds. Part 3. A short ans practical synthesis of mikanecic acid (4‐vinyl‐1‐cyclohexene‐1,4‐dicarboxylic acid) (1984) (66)
Isolation and X-Ray Crystal Structure of a Palladacyclobutane: Insight into the Mechanism of Cyclopropanation† (1995) (61)
Cycloadditions and reactivity of 2-methoxyallyl halides (1973) (47)
Nucleophilic Attack at the Central Carbon Atom of (π‐Allyl)palladium Complexes: Formation of α‐Cyclopropyl Esters (1992) (47)
8‐Oxabicyclo[3.2.1]oct‐6‐en‐3‐one: Anwendungen in der asymmetrischen Synthese polyoxygenierter Bausteine (2004) (46)
Microbial transformations of some monoterpenoids and sesquiterpenoids. (1985) (46)
SYNTHESIS OF OXAZATWISTANES AND THEIR HOMO- AND BISHOMO-ANALOGUES FROM QUINIDINE : MEDIUM RING SYSTEMS DERIVED FROM CINCHONA ALKALOIDS (1998) (42)
Chiral Allyl Cations in Cycloadditions to Furan: Synthesis of 2-(1'-Phenylethoxy)-8-oxabicyclo[3.2.1]oct-6-en-3-one in High Enantiomeric Purity. (1998) (40)
Cyclopropanes by Nucleophilic Attack of Mono‐and Diaryl‐Substituted (η3‐Allyl)palladium Complexes: Aryl Effect and Stereochemistry (1994) (40)
A New, Efficient and Stereocontrolled Synthesis of Trisubstituted Alkenes via Functionalized Acrylic Esters (1983) (40)
Synthesis of 2‐Norzizaene and 9,10‐Dehydro‐2‐norzizaene (7,7‐Dimethyl‐6‐methylidenetricyclo[6.2.1.01,5]undec‐9‐ene) via Intramolecular Allyl Cation Induced Cycloaddition (1983) (35)
Synthesis of the C38−C44 Segment of Altohyrtin A − With an Addendum on the Preparation of 8‐Oxabicyclo[3.2.1]oct‐6‐en‐3‐one (2000) (35)
Acylation of olefins by acetyl hexachloroantimonate. Selective formation of .beta.,.gamma.-unsaturated ketones under kinetic control and mechanistic rationale as an ene reaction (1977) (35)
The total syntheses of phorboxazoles--new classics in natural product synthesis. (2003) (34)
Asymmetric synthesis of seven-carbon segments of the phorboxazoles and (−)-discodermolide: Complementary route from racemic trans-2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one (1999) (33)
Stereoselective generation and facile dimerization of (E)-2-methylene-3-alkenoic acid esters (1988) (33)
Nucleophilic Organosilicon Intermediates Turned Electrophilic: (Trimethylsilyl)methyl, Trimethylsilyloxy and also 2-Tetrahydropyranyloxy as Terminators of Cycloadditions of Allyl Cations. A Short Route to Dehydrozizaenes (6-Methylenetricyclo[6.2.1.01,5]-undec-9,10-enes) and Related Tricycles and [3. (1988) (32)
DABCO-Mediated Synthesis and Biological Activity of Cyanohydrin Esters (1990) (32)
Fused triazoles via tandem reactions of activated Cinchona alkaloids with azide ion. Second Cinchona rearrangement exemplified. (2003) (31)
ASYMMETRIC SYNTHESIS OF THE C(10)-C(16) SEGMENT OF THE BRYOSTATINS (1996) (31)
Cyclopropanes via nucleophilic attack at the central carbon of (π-allyl)palladium complexes (1993) (28)
Debromination of .alpha.,.alpha.1-dibromo ketones with a zinc-copper couple in dimethylformamide and dimethylacetamide. New reaction yielding 2-dimethylamino-4-methylene-1,3-dioxolanes (1972) (28)
Aflatoxins Revisited: Convergent Synthesis of the ABC-Moiety (1988) (26)
8-oxabicyclo[3.2.1]oct-6-en-3-one as a module for the synthesis of β-alkoxy-δ-valerolactones relevant to natural products and drugs (1997) (25)
Cycloadditions of allyl cations, 22. Allyl alcohols as precursors of allyl cations (1980) (25)
Samarium diiodide-mediated pinacolization of 1,4-diketones —I. Stereoselective synthesis of fused mono-, bi- and tricyclic cyclobutane-1,2-diols (1996) (25)
Toward the total synthesis of disorazole A(1) and C(1): asymmetric synthesis of a masked southern segment. (2002) (25)
Asymmetric synthesis of the northern half C1-C16 of the bryostatins. (2001) (25)
Cycloadditions of cyclic allyl cations to furan. Configuration and conformational analysis of the resulting bridged six-membered rings. Isolation and identification of boat and chair atropisomers (1974) (25)
Synthesis of 10,11-DidehydroCinchona Alkaloids and Key Derivatives (2000) (24)
Asymmetric synthesis of the C(18)C(24) unit of lasonolide A (1997) (24)
Versatile 8-oxabicyclo[3.2.1]oct-6-en-3-one: stereoselective methodology for generating C-glycosides, delta-valerolactones, and polyacetate segments. (2001) (24)
Cycloadditions of Allyl Cations, 21. Synthesis and 1H NMR Spectra of Bicyclo[3.2.1]octa-2,6-Dienes and 3-Methylenebicyclo[3.2.1]oct-6-enes from Bicyclo[3.2.1]oct-6-en-3-ones Methylated at C-2 and C-4 (1980) (24)
A Tricyclic Dehydrorubanone and New Isomers of the Major Quinidine Metabolite (1996) (23)
Synthesis of cyclobutylideneacetic esters via aluminum chloride promoted [2+2] cycloadditions of ethyl 2,3-butadienoate to olefins (1981) (23)
On the way to aflatoxins and related structure types. Regio-controlledannulations by application of homogenous palladium catalysis, urethane tether and ortho,ortho'-diiodine effect (1991) (22)
Samarium diiodide-mediated pinacolization of diketones—II. Synthesis of polycyclic frameworks containing a cyclobutane-1,2-diol and a cyclopentane-1,2-diol (1996) (22)
A New Tropinone Synthesis (1974) (22)
Cycloadditions of allyl cations, 25. Acid catalyzed dehydrative cyclodimerization of 2,4‐dimethyl‐3‐penten‐2‐ol in two phases. Biomimetic one‐pot preparation of 3,3,5,5‐tetramethyllimonene (4‐isopropenyl‐1,3,3,5,5‐pentamethyl‐1‐cyclohexene) (1981) (22)
Cross-coupling reactions in Cinchona alkaloid chemistry: aryl-substituted and dimeric quinine, quinidine, as well as quincorine and quincoridine derivatives (2001) (22)
Stereocontrolled Construction of 6 · 5 · 6 and 5 · 5 · 6 Ring Systems by Radical Tandem Cyclization†‡ (1992) (22)
One stage synthesis of bicyclo[3.2.2]nona-6,8-dien-3-ones. Silver trifluoroacetate induced reaction of 2-methoxyallyl bromide with arenes (1974) (21)
Synthesis of the C1C9 segment of bryostatin (1997) (21)
ASYMMETRIC SYNTHESIS OF THE ENANTIOPURE C28-C41 SEGMENT OF THE PHORBOXAZOLES A AND B (1999) (21)
First Synthesis of the Functionalized Dioxatricyclic Core Structure of Dictyoxetane and Proposed Biogenesis in Dictyota Dichotoma (1995) (21)
From Tetronic Acid and Furfural to C(4)-Halogenated, Vinylated and Formylated Furan-2(5H)-ones and Their 5-Alkoxy Derivatives (1996) (21)
Regioselective preparation of vinylcyclopentadienes and selected cycloadditions (1986) (21)
[4+3] cycloadducts from Lewis acid mediated reactions of acroleins with cyclopentadiene. (2004) (21)
Synthesis of Acyl Cyanides from Acyl Iodides (1982) (21)
Stereoselective synthesis of precursors of naturally occurring robustadials A and B (1993) (20)
Stereoselective Synthesis of (E)-3-Methylene-4-alken-2-ones from Aldehydes and Methyl Vinyl Ketone and Their Spontaneous Dimerization†‡ (1987) (20)
Stereocontrolled Synthesis of Heteroannular Acetals from Functionalized 1,5-Enynes via Radical Cascades—Construction of Quaternary and 1,2-Diquaternary Centres in Polycyclic Systems (2000) (20)
Improved procedure for the generation of allyl cations from simple dibromo ketones. Change of mechanism on reaction with triethyl borate amd zinc. Cycloadditions to conjugated dienes. (1975) (19)
Synthesis of α,β‐Unsaturated and Other Reactive Acyl Cyanides (1982) (19)
Synthesis of Enantiopure C-Glycosides and Pseudo C-Glycosides. Lewis Acid Mediated Cleavage of [3.3.1] Oxabicyclic Lactones (1999) (19)
Chelation, activation, and proximity effects in the deprotection of dithianes with ZnBr(2): applications in the polyketide field. (2001) (19)
The Invention of Chemical Transformations. Functionalized and Enantiopure Quinuclidines from Cinchona Alkaloids (1996) (19)
The Synthesis of Acyl Iodides (1981) (19)
Lipase mediated desymmetrization of meso-2,6-di(acetoxymethyl)-tetrahydropyran-4-one derivatives. An innovative route to enantiopure 2,4,6-trifunctionalized C-glycosides (1996) (18)
The total synthesis of C-glycosides with completely resolved seven-carbon backbone polyol stereochemistry: stereochemical correlations and access to L-configured and other rare carbohydrates. (2001) (18)
Trispiro[2.1.2.1.2.1]dodecane-4,8,12-trione and other oligomers of carbonylcyclopropane. The organozinc route (1989) (18)
Synthesis of enantiopure C-glycosides and pseudo C-glycosides: Lewis-acid mediated heterolysis of methyl acetals (1999) (18)
Thermodynamically unstable enols. 2-Methyl-2-penten-3-ols from 4-isopropylidene-5,5-dimethyl-2-dimethylamino-1,3-dioxolane (1972) (18)
Asymmetric synthesis of polyacetate derived building blocks with α-oxyanion functionality. Lewis acid catalyzed opening of 2,9-dioxabicyclo[3.3.1]nonan-3-ones (1999) (18)
Synthesis of Unsaturated Nine-Membered Ring Ethers (Δ3 -Oxonenes) Containing a Z- or E-Configurated Double Bond: Thermodynamic versus Kinetic Control in Palladium-Catalyzed Allylic Cyclizations. (1998) (18)
DIASTEREOSELECTIVE SYNTHESIS OF FUNCTIONALIZED 9-RING ETHERS (OXONINS) (1995) (18)
Synthesis and studies of marine natural products: the dictyoxetane core from 8-oxabicyclo[3.2.1]oct-6-en-3-ones (2002) (18)
A ring contraction of 6-alkoxy-2,3-dihydro-6H-pyran-3-ones to polyfunctionalized cyclopentenones (1990) (18)
Direct observation of chair-boat equilibriums in bridged six-membered rings (1973) (18)
From Quinidine to new Enantiopure Materials–Tricyclic Allylic N,O‐Acetals and a Stereospecific, Onepot Conversion of 1,2‐Secondary, Tertiary Diols into Spiroepoxides (1996) (17)
Recalcitrant SN2 Displacements at Carbon C9 of Quincorine and Quincoridine: 1,2-Amino Halides and Mesylates with Configurationally Rigid Nitrogen (2000) (17)
Endo selectivity of allenic esters in Diels-Alder additions to cyclopentadiene. The effect of added aluminum trichloride and an approach to dehydrosantalene analogs (1981) (17)
The first and second cinchona rearrangement. Two fundamental transformations of alkaloid chemistry. (2004) (17)
Synthesis of 10,11-didehydro- and 10,11-dihydro-Quincorine and of the Quincoridine analogs: functionalized and enantiopure 1-azabicyclo[2.2.2]-octanes with four stereogenic centers (1998) (17)
Dimerization of (e)-2-benzenesulfonyl-1,3-alkadienes the benzenesulfonyl group exerts acyclic stereocontrol (1990) (17)
Oxazatricyclic noradamantanes: stereocontrolled synthesis of functionalized scopolines, related cage molecules, and drug leads. (2004) (17)
Synthesis of the C29–C37 segment of spongistatin 1 (1999) (17)
Synthesis of 1,4-diketones by reductive coupling of .alpha.,.alpha.'-dibromo ketones (1974) (16)
Stereoconvergent synthesis of enantiopure (-)-trans-lauthisan. Building kit for medium ring oxacycle construction and contrathermodynamic epimerization at allylic carbon C(8) via “invisible”, E-configurated medium ring olefin☆ (1995) (16)
Synthesis of dioxatricyclic segments of dictyoxetane. Oxygenated 6,8-dimethyl-2,7-dioxatricyclo[4.2.1.03,8]nonanes show antitumor activity (1998) (16)
Terpenes and terpenoid compounds. 9. Homologs of monocyclic monoterpenes. Tetramethylated derivatives of carvone, carveol .beta.-terpineol, sobrerol, and related compounds (1982) (16)
Synthesis and π-facially selective cycloadditions of pinofurans (1988) (15)
Synthesis of 2-methoxyallyl chloride, bromide, and iodide by two independent routes. Reaction of N-halosuccinimides with 2-methoxypropene and the pyrolysis of 1-halo-2,2-dimethoxypropanes (1972) (15)
Synthetic studies toward the disorazoles: synthesis of a masked northern half of disorazole D1 and a cyclopropane analog of the masked northern half of disorazole A1 (2003) (15)
2,2,4,4-Tetramethyl-3-methylenebicyclo [3.2.1] oct-6-ene (1984) (15)
Tandem radical mediated 5-exo-trig, 6-endo-dig cyclization. Stereoselectivity, α-trimethylsilyl effect and the product spread — IV (1997) (15)
STRUCTURE-ACTIVITY INVESTIGATIONS OF ANALOGUES OF THE C15-C26 PHORBOXAZOLES SEGMENT (1999) (15)
One-pot preparation of α-cyanovinyl ethers (2-alkoxy-2-alkenenitriles) from vinyl ethers: elaboration to 3-alkoxy-2-oxo-3-alkenenitriles and aluminium chloride-catalyzed cycloadditions to cyclopentadiene (1986) (15)
Asymmetric Synthesis of the C1–C16 Segment of Lasonolide A (1999) (14)
Cycloadditions of Allyl Cations, 281)Novel Diels‐Alder Additions via Acid Catalyzed Reactions of 4‐Methyl‐3‐penten‐2‐ol with Cyclopentadiene and Cyclohexadiene in Two Phases. Formation of Monocyclic, Bicyclic, and Tricyclic Adducts and Double Fragmentation of a Norbornenylcarbinol (1981) (14)
New Bicyclic Conjugates of Three- and Five-Membered Heterocycles with 5-Alkoxyfuran-2(5H)-ones (4-Alkoxy-Δ2-butenolides) (1996) (14)
Total Synthesis of Manoalide. (1998) (14)
Synthesis of enantiopure 1-azabicyclo[3.2.2]nonanes via stereoselective capture of chiral carbocations. (2000) (14)
Cyclobutenecarboxylic esters via aluminum chloride induced [2 + 2] cycloadditions of 2-propynoic esters to cyclic olefins (1979) (14)
Synthesis and reactions of novel tricyclo[4.3.1.12,5]undec‐3‐en‐10‐ones (1990) (13)
Synthesis of enantiopure 3-quinuclidinone analogues with three stereogenic centers: (1S,2R,4S)- and (1S,2S, 4S)-2-(Hydroxymethyl)-1-azabicyclo[2.2.2]octan-5-one and stereocontrol of nucleophilic addition to the carbonyl group. (2000) (13)
Chelation-Controlled Reduction of α-Methylated 8-Oxabicyclo[3.2.1]oct-6-en-3-ones with Samarium Diiodide. Diastereoselective Preparation of Secondary Alcohols (1997) (13)
Cycloadditions of Allyl Cations, 261) Norbornene Derivatives from Cyclopentadiene and 2,4‐Dimethyl‐3‐penten‐2‐ol in an Acidic Two Phase System. A Stepwise Diels‐Alder‐like Cyclization (1981) (13)
Polyannulated glycopyranosides via radical-mediated tandem reactions. Stereoselective synthesis of 6·5·6 dioxatricycles via 5-exo-trig, 6-endo-dig mode — III (1997) (13)
Asymmetric synthesis of a seven carbon anit-3,5-diol building block. A polyacetate derivative with completely resolved C2 symmetry (1996) (13)
Monoterpenoids via Concurrent 4+3→7 and 3+2→5 Cyclizations (1977) (13)
Diastereocontrol of nucleophilic attack of the rubanone carbonyl group via remote siloxy tether. Establishing the natural configuration at carbon C-3 of Cinchona alkaloids (1997) (13)
Cycloadditions of Allyl Cations, 29. Acid Catalyzed Reactions of 2,3-Dimethyl-3-penten-2-ol and Cyclopentadiene in Two Phases. Formation of Seven- and Five-membered Rings (1981) (12)
SYNTHESIS OF BRIDGED NINE-MEMBERED RING ETHERS : STUDIES DIRECTED TOWARDS THE SYNTHESIS OF EUNICELLIN-BASED MARINE DITERPENES (1997) (12)
Synthesis of a Tetradehydro‐Disorazole C1 (2006) (12)
Structure and Mechanism inCinchona Alkaloid Chemistry: Aqueous Hydrolysis Proceeds with Complete Inversion or Complete Retention of Configuration (2000) (12)
Acylation and O-sulfonylation of Quincorine® and Quincoridine®. Efficient intramolecular catalysis (1998) (12)
Chirale Allylkationen in Cycloadditionen an Furan – Synthese von 2‐(1′‐Phenylethoxy)‐8‐oxabicyclo[3.2.1]oct‐6‐en‐3‐on in hoher Enantiomerenreinheit (1998) (11)
1252. The rate of displacement of toluene-p-sulphonate relative to bromide ion. A new mechanistic criterion (1965) (11)
Reactive iodine compounds. 8. Synthesis and copper(I) cyanide-promoted cyanation of iodoformic esters (1984) (11)
3-Methoxybuta-1,3-dienone(tricarbonyl)iron. A novel carbonylation and a stabilised vinylketen (1972) (11)
Synthesis and CuCN-promoted cyanation of iodoformic esters (1984) (11)
Synthesis of 3(2H)-furanones (1972) (11)
1253. kOTs/kBr Ratios and the separation of charges in the transition states of solvolytic displacements (1965) (11)
Synthesis of nonenolizable 6-hydroxy-2,4-cycloheptadien-1-ones (1992) (11)
Ring‐chain tautomerism provides a route to 7a‐hydroxy‐3a‐methyl‐2,7‐dioxoperhydrobenzofuran. Synthesis of the hydroxy γ‐lactone substructure of myrocin and other bioactive natural products (1995) (11)
Cycloadditions of allyl cations. 24. Sterically crowded ring systems. Preparation and x-ray crystal structure of 9,10,11,11,13,13-hexamethyl-12-oxo-9,10-propanoanthracene (1981) (11)
Transition States in the Gas Phase and in Solution (1965) (11)
S(N)1-like reactions of bicyclic alpha-amino ethers with sulfur, nitrogen, and carbon nucleophiles. Synthesis of 1-azabicyclo[3.2.2]nonanes functionalized at carbon C2 and C6 with complete stereocontrol. (2002) (11)
Preparation of enantiopure 1-azabicyclo[3.2.2]nonanes functionalized at carbon C3, from cinchonine and cinchonidine. stereoselective solvolysis and an easily enolizable ketone. (2003) (10)
Diastereoselective Synthesis of Methylated α-Methoxy-8-oxabicyclo[3.2.1]oct-6-en-3-ones. Contrathermodynamic Introduction of Methoxy Group by Low Temperature [4 + 3]-Cycloaddition (1999) (10)
Solvent effects on regioselection in 4+3→7 cyclizations. A stepwise reaction of trans-1,3-pentadiene. (1978) (10)
Structural and Stereochemical Diversity from (±)-2,2-Dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one − Application to the Synthesis of Polyketide Segments of Natural Products (2002) (10)
Vicinal bromopropargoxylation of cyclic olefins and cobaloxime-mediated heteroannulation to functionalized 3-methyleneoxacyclopentanes (1989) (10)
Selected Transformations of 6‐Cyclopropylidene‐5‐oxaspiro[2.3]hexan‐4‐one, a Highly Strained Tricyclic β‐Lactone (1994) (9)
A Short Route to 7,7‐Dimethyl‐6‐methylenetricyclo[6.2.1.01,5]undeca‐9‐ene and the Zizaene Class of Sesquiterpenoids (1982) (9)
The three-component condensation of monoterpenes with formaldehyde and cyclohexane-1,3-dione. A simple route to polyketide terpenes (1994) (9)
Trispiro[2.1.2.1.2.1]dodecan‐4,8,12‐trion (1985) (9)
Novel Bridged Bicyclic α-Amino Acid Esters and Key Derivatives from Quincorine and Quincoridine (1999) (9)
The intramolecular enyne diels-alder reaction. Stereoselective construction of tricyclic dioxadienones and mechanistic outline (1993) (9)
A Total Synthesis of Racemic and Optically Active Terrein (trans-4,5-Dihydroxy-3-((E)-1-propenyl)-2-cyclopenten-1-one). (1990) (8)
Functionalized Barbaralanes ring expansion of bicyclo[3.2.1]oct-6-en-3-ones. Heteroatom effects on degenerate cope rearrangements (1976) (8)
Pyranofuranones via Lewis Acid Mediated Hetero-Diels-Alder Reactions of 4-Furan-2(5H)-ones: A Convergent Route to the Manoalide Substructure (1996) (8)
Novel Carbonylcyclopropane Dimers and Trimers—Free Ketenes or Organometallic Intermediates? (1985) (8)
The Enol Lactone Approach to Protected Hydroxy γ-Lactones (5-Hydroxy-dihydro-furan-2-ones) (1996) (7)
Hindered rotation of the isopropenyl group in substituted isopropenylcyclohexanes and identification of preferred rotamers by nuclear magnetic resonance. Bent bonds may be better bonds (1983) (7)
2-lodoethyl Esters from Acyl Chlorides, Ethylene Oxide, and Sodium Iodide (1982) (7)
The Synthesis of Aliphatic Dicarboxylic Acid Diiodides and Aromatic Analogues (1982) (7)
Oxygenated limonene analogs. Preparation of tetramethylated carvone and carveols via regiocontrolled opening of tetramethyllimonene oxide. (1981) (7)
Simple Entry into Tricyclo[3.3.0.03,7]octanes (1991) (7)
On the configuration and conformation of oxyallyls in medium and large rings (1995) (7)
Unified approach towards medium ring allylic ethers. Stereoselective synthesis of 2,10-dialkylated (E)-oxacyclodec-3-enes by palladium catalyzed cyclization (1998) (7)
SYNTHESIS AND BIOLOGICAL ACTIVITY OF α-METHYLENE-Γ-BUTYROLACTONES (1985) (7)
Two-fold rotational barriers in 1,1,2,2-tetrasubstituted ethanes: a dynamic NMR and molecular mechanics study of some highly-branched saturated hydrocarbons (1988) (7)
New Dihydropyrans: Lewis Acid Catalyzed Cycloadditions of α,β‐Unsaturated Acyl Cyanides to Simple Unactivated Olefins and Dienes. Practical Route to Derivatives of Rose Oxide (1982) (6)
Intramolecular Diels–Alder reaction of a sulphonyl-activated 1,3,9-triene (1990) (6)
A new synthesis of functionalized 6,8-dioxabicyclo[3.2.1]octanes (1988) (6)
Synthesis of 10,11‐Didehydro Cinchona Alkaloids and Key Derivatives. (2000) (6)
Non-stabilized azomethine ylides in [3 + 2] cycloadditions. Pyrrolidinylfuranones from (5S)-5-menthyloxy-4-vinylfuran-2(5H)-one (1998) (6)
Regio‐ and Stereoselective Transformations of 3,3,5,5‐Tetramethylcyclohexane Derivatives Oxygenations, Annulations, and SN2′‐Reactions (1988) (6)
A Synthesis of Annulated Dihydropyrans via Hetero Diels-Alder Reaction. A Simple Approach to Alboatrin Models (1990) (6)
Total Synthesis of Dictyodendrillin-B (1998) (6)
α-Methylidene- and α-Alkylidene-β-lactams from Nonproteinogenic Amino Acids. (1991) (5)
Isobullatenone and a demethylated analog. A new route to 3(2H) furanones. (1972) (5)
Synthesis of Acyclic, Multifunctionalized α,α′-Disecondary Ethers with Full Control of Chemo-, Regio- and Enantioselectivity (1994) (5)
The facile 1,5-hydrogen shift in 6-hydroxy-2,4-cycloheptadien-1-ones (1992) (5)
3‐Isopropyliden‐2,2‐dimethyloxiran (Tetramethylallenoxid) (1970) (5)
Octamethyl-1,4-cyclohexanedione. Chair conformation in the crystal state (1976) (5)
One-pot synthesis of novel monoterpenoid ethers. (1978) (5)
Terpenes and Terpenoid Compounds, 14. Synthesis of Oxygenated Derivatives in the Tetramethyllimonene Series. New Odorants of the Wood-ambergris Type (1985) (5)
Remote 1,5-induction and steric approach control in Horner–Wadsworth–Emmons reactions. The stereoselective construction of trisubstituted, exocyclic double bonds from unsymmetric cyclic ketones (1996) (5)
Highly alkylated cyclohexanes. – X-Ray crystal structures, force-field calculations, and conformations of cis/trans-1,4-disubstituted cyclohexane isomers (1988) (5)
Regiocontrolled Prenylation and Alkylations of Furans: Preparation of Rosefuran and New Analogues (1983) (5)
Synthesis and Diels-Alder reactions of 1-acylated 1,3-cyclopentadienes (1981) (5)
1251. The preparation of unstable toluene-p-sulphonates (1965) (5)
Cycloadditions of allylic cations to conjugated dienes: stereochemistry (1968) (5)
1,2‐Carbonyl Transposition of a Protected Rubanone: Stereoselective synthesis of bicyclic and tricyclic lactams derived from quinidine (1998) (5)
Reactions of Isobenzofurans and Isoindoles: Cycloadditions with Oxyallyl Cations from Two Different Sources and Preferred Extended Attack to N-tert-Butylisoindole (1990) (4)
Biotransformation of tetramethyl-limonene (1986) (4)
Spiro[cyclopropane-1,4'-[2]oxabicyclo[3.2.0]hept-1(5)-en]-3'-one and its Δ1,7 isomer from diastereomeric selenoxides (1993) (4)
Synthesis of tricyclic N,O-acetals from α-functionalized rubanone. A masked 1,2,3-tricarbonyl system from quinidine (1998) (4)
Highly diastereoselective aldol reaction of bicyclo[3.2.1]oct-6-en-3-ones and 8-oxabicyclo[3.2.1]oct-6-en-3-ones. (E)-Selective conversion into α-alkylidene ketones (1993) (4)
Cycloadditions of the 2-methylallyl cation to conjugated dienes (1968) (4)
Toward the Total Synthesis ofDisorazole A1: Asymmetric Synthesis of the MaskedNorthern Half (2003) (4)
Novel base-induced isomerization of unsaturated alcohols to aldehydes (1985) (4)
Cycloadditions of Allyl Cations, 271) Dehydrative Cyclodimerization of 4‐Methyl‐3‐penten‐2‐ol‐in Two Phases. One‐Pot Preparation of Dimethylated Limonenes and α‐Terpineol (1981) (4)
Stereochemistry of SN1 displacement at a vinylic carbon (1970) (4)
New members of the caryophyllene family via biomimetic π-cyclizations and consecutive transformations (1993) (4)
Synthesis of Norbornenes from Cyclopentadiene and Allyl Alcohols in an Acidic Two Phase System (1980) (4)
245. Reaction kinetics and the walden inversion. Part X. A method for estimating the optical purity of certain secondary and primary alkyl halides. Application to 1-methylheptyl chloride, bromide, and iodide (1964) (4)
DABCO-Catalyzed Coupling of Aldehydes with Activated Double Bonds. Part 6. Stereoselective Generation and Facile Dimerization of E-2-Methylene-3-alkenoic Acid Esters. (1989) (4)
Synthesis of rosethiophene, a new flavour compound (1986) (4)
Synthesis of 2α‐Benzyloxy‐8‐oxabicyclo[3.2.1]oct‐6‐en‐3‐one by [4 + 3] Cycloaddition (2006) (4)
A Simple Dialkylated Enol (1973) (4)
Strained Ketenes from α‐Bromoacyl Phosphates. (Tricyclo[4.4.1.01,6]undeca‐3,8‐dien‐11‐ylidene)methanone and its Heptacyclic Dimer: a Dispirobridged Dipropellane (1,1″,4,4″,5,5″,8,8″‐Octahydrodispiro[[4a, 8a]methanonaphthalene‐9,1′‐cyClobutane‐3′,9″‐[4a, 8a]methanonaphthalene]‐2′, 4′‐dione) (1988) (4)
244. Reaction kinetics and the walden inversion. Part IX. The rotations of optically pure 1-phenylethyl chloride and bromide (1964) (3)
Debromination of α,α′-dibromo-ketones with a zinc–copper couple in methanol. Formation of α-methoxy-ketones as a criterion for the intervention of 2-oxyallyl cations (1972) (3)
Regioselective preparation of iodinated phloroglucinols (1992) (3)
Notizen. The Synthesis of Iodoglyoxalic Esters. Cleavage of Tetrahydrofuran and 1,2‐Dimethoxyethane (1984) (3)
3‐Isopropylidene‐2,2‐dimethyloxirane (Tetramethylallene Oxide) (1970) (3)
From Tetronic Acid and Furfural to C(4)‐Halogenated, Vinylated and Formylated Furan‐2(5H)‐ones and Their 5‐Alkoxy Derivatives. (1996) (3)
The Invention of Chemical Transformations. Functionalized and Enantiopure Quinuclidines from Cinchona Alkaloids. (1996) (3)
246. Reaction kinetics and the walden inversion. Part XI. Steric course of bimolecular necleophilic substitution by a natural nucleiophile on a neutral substrate (1964) (3)
3-Hydroxy-2-methylenecycloalkanones, Preparation and Dehydrative Dimerization to Bisannulated 6,8-Dioxabicyclo[3.2.1]octanes (1990) (3)
Unusual Variant of the Favorsky Rearrangement. Formation of α–keto acetals (1997) (3)
Improved procedure for the reductive intermolecular cyclodehalogenation of 2,6-dibromocyclohexanones to furan and fulvenes (1991) (3)
N,O‐bis(trimethylsilyl)acetamide (BSA) – A mild silyl transfer reagent (1995) (2)
DABCO-CATALYZED COUPLINGS OF ACRYLIC ACID ESTERS WITH ALDEHYDES. 1. SYNTHESIS S OF 2-(1-HYDROXYALKYL)ACRYLIC ACID ESTERS; SIMPLE THREE-STEP SYNTHESIS OF MIKANECIC ACID (1984) (2)
Simple Synthesis of Bicyclo[3.2.2]nona‐6,8‐dien‐3‐ones from Arenes (1974) (2)
Crystal structure of 4a(S),4b(R),5(R),5a(S),9a(R),10a(S),11a(R)-benzoic acid-2-iodo-7,7-dimethyl-1,4,4a,4b,5,5a,9,9a,10a,11a-decahydro-6,8,10,11-tetraoxa-benzo[b]fluoren-5-ylester, C22H25IO6 (1997) (2)
Synthesis of the Enantiopure C15—C26 Segment of Phorboxazole A and B. (1999) (2)
The crystal and molecular structure and solid state conformation of 2,2,4,4,6,6,-hexamethylcyclohexanetrione (1981) (2)
247. Reaction kinetics and the walden inversion. Part XII. Steric course of bimolecular nucleophilic substitution of an initially positively charged leaving group by a neutral nucleophile (1964) (2)
Synthesis of 9,10-Dihydro-9,10-propanoanthracen-12-ones Substituted at the Bridgehead. (2010) (2)
SYNTHESIS OF 1,4-DIKETONES BY REDUCTIVE COUPLING OF ALPHA,ALPHA′-DIBROMO KETONES (1974) (2)
Stereoselective Synthesis of Precursors of Naturally Occurring Robustadials A and B. (1994) (2)
Generation of Carbonylcyclopropanes [Cyclopropyl idenemethanones] and Steric Course of Cyclodimerization to Dispiro[2.1.2.1]octan‐4,8‐diones (1982) (2)
Studies on the asymmetric dihydroxylation of advanced Bryostatin C-ring segments (2004) (2)
A near-paradox of E1cb-like elimination in the 2-phenylethyl system (1967) (2)
Asymmetric Synthesis of the Enantiopure C28—C41 Segment of the Phorboxazoles A and B. (1999) (2)
Unrearranged and other products from the solvolysis of neopentyl toluene-p-sulphonate (1967) (2)
Favorsky rearrangement under Reformatsky conditions. The zinc-induced debromination of 1,3-dibromo-1,1-diphenylpropan-2-one in methanol as solvent (1975) (2)
Starburst Spiroannulation and X-Ray Crystal Structure of 6-Cyclopropylidene-5-oxaspiro[2.3]-hexan-4-one (1992) (2)
Synthesis of the C1—C9 Segment of Bryostatin. (1998) (2)
Organic Chemistry of Cinchona Alkaloids (2009) (2)
Cycloadditions of simple allyl cations to conjugated dienes. Optimization and scope of the reaction (1971) (2)
N-Methoxy-N-methylamides (Weinreb Amides) in Modern Organic Synthesis. (1997) (2)
SN1-Like Reactions of Bicyclic α-Amino Ethers with Sulfur, Nitrogen, and Carbon Nucleophiles. Synthesis of 1-Azabicyclo[3.2.2]nonanes Functionalized at Carbon C2 and C6 with Complete Stereocontrol. (2003) (1)
Crystal structure of 2(R),3(S),4(R),4a(R),4b(R),5(R),8a(S),9a(S)-2-acetoxymethyl-5-tri-methylsilyl-7-iodo-3,4,4a,4b,5,8,8a,9a-octahydro-2H-pyrano[2,3-b]-benzofuran-3,4-diol diacetate, C21H31IO8Si (1997) (1)
Crystal structure of (2S,5R)-1-chloromethyl-2-hydroxymethyl-5-vinyl-1- azoniabicyclo[2.2.2]octane chloride, (C11H19ClNO)Cl (1998) (1)
ALLYL ALCOHOLS AS PRECURSORS OF ALLYL CATIONS (1981) (1)
CARBONYLCYCLOPROPANES (CYCLOPROPYLIDENEMETHANONES: PREPARATION AND STEREOCHEMISTRY OF CYCLODIMERIZATION TO DISPIRO(2.1.2.1)OCTANE‐4,8‐DIONES (1982) (1)
Structure—Activity Investigations of Analogues of the C15—C26 Phorboxazoles Segment. (2000) (1)
FUNCTIONALIZED BARBARALANES VIA RING EXPANSION OF BICYCLO(3.2.1)OCT-6-EN-3-ONES. HETERATOM EFFECTS ON DEGENERATE COPE REARRANGEMENTS (1976) (1)
Synthesis of Tetramethyl Monoterpenes (1987) (1)
Crystal structure of endo,endo-2,6-diiodo-9-oxa-bicyclo[3.3.1]nonane, C8H12I2O (1996) (1)
Polyannulated Glycopyranosides via Radical‐Mediated Tandem Reactions. Stereoselective Synthesis of 6,5,6‐Dioxatricycles via 5‐exo‐trig, 6‐endo‐dig Mode. Part 3. (2010) (1)
The behaviour of some α,α′‐dibromoketones on electron impact. An analogy to the reductive removal of bromine in solution (1976) (1)
Carbonylcyclopropanes(Cyclopropylidenemethanones): Preparation and Steric Course of Cyclodimerization to Dispiro[2.1.2.1]octane-4,8-diones† (1982) (1)
A Tricyclic Dehydrorubanone and New Isomers of the Major Quinidine Metabolite. (1996) (1)
Synthesis of Dioxatricyclic Segments of Dictyoxetane. Oxygenated 6,8-Dimethyl-2,7-dioxatricyclo[4.2.1.03,8]nonanes Show Antitumor Activity. (1999) (1)
REACTIVE IODINE COMPOUNDS. PART 5. 2-IODOETHYL ESTERS FROM ACYL CHLORIDES, ETHYLENE OXIDE, AND SODIUM IODIDE (1982) (1)
Photoelectron spectra and electronic structure of some diastereomeric quinuclidine derivatives. (2002) (1)
The Total Synthesis of C‐Glycosides with Completely Resolved Seven‐Carbon Backbone Polyol Stereochemistry: Stereochemical Correlations and Access to L‐Configured and Other Rare Carbohydrates. (2002) (1)
Toward the total synthesis of disorazole A1: Asymmetric synthesis of the masked northern half (2003) (1)
NEW SYNTHETIC METHODS. 40. THE CYCLOADDITION OF ALLYL CATIONS ON 1,3-DIENES: A GENERAL METHOD FOR THE SYNTHESIS OF SEVEN-MEMBERED CARBOCYCLES (1984) (1)
CYCLOBUTENECARBOXYLIC ESTERS VIA ALUMINUM CHLORIDE INDUCED (2 + 2) CYCLOADDITIONS OF 2-PROPYNOIC ESTERS TO CYCLIC OLEFINS (1979) (1)
Asymmetric Synthesis of the C(18)-C(24) Unit of Lasonolide A. (1997) (1)
Crystal structure of (1S,2R,4S)-2-bromomethyl-1-azabicyclo[2.2.2]·octan-5-one, C8H12BrNO (2000) (1)
Preparation of 5-Bromotetronates (4-Alkoxy-5-bromo-2(5H)-furanones) and a New Concept for the Synthesis of Aflatoxins and Related Structure Types. Tributyltin Hydride versus Palladium-Promoted Intramolecular Hydroarylation. (1990) (1)
SYNTHESIS OF 2-NORZIZAENE AND 9,10-DEHYDRO-2-NORZIZAENE (7,7-DIMETHYL-6-METHYLIDENETRICYCLO(6.2.1.01,5)UNDEC-9-ENE) VIA INTRAMOLECULAR ALLYL CATION INDUCED CYCLOADDITION (1983) (1)
Evidence for merging of mechanism in competing SN2 and E2 processes (1967) (1)
trans-C-Glycosides from 8-Oxabicyclo[3.2.1]oct-6-en-3-one. Synthesis of the C3—C13 Segment of the Phorboxazoles A and B. (1999) (1)
Chelation, Activation, and Proximity Effects in the Deprotection of Dithianes with ZnBr2. Applications in the Polyketide Field. (2001) (1)
New Bicyclic Conjugates of Three‐ and Five‐Membered Heterocycles with 5‐Alkoxyfuran‐2(5H)‐ones (4‐Alkoxy‐δ2‐butenolides). (1996) (1)
Electron impact induced water elimination from hydroxyamides. 1—N‐(2′‐hydroxyethyl)piperidone‐2 and N‐3′‐hydroxypropyl piperidone‐2 (1983) (1)
Pyranofuranones via Lewis Acid Mediated Hetero‐Diels‐Alder Reactions of 4‐Furan‐2(5H)‐ones: A Convergent Route to the Manoalide Substructure (1996) (1)
Bicyclic Ketones for the Synthesis of Tropinoids: 2α,4α‐Dimethyl‐8‐Oxabicyclo[3.2.1]oct‐6‐en‐3‐one (2003) (1)
Cyclopropanes via Nucleophilic Attack at the Central Carbon of (π- Allyl)palladium Complexes. (1993) (0)
NEW DIHYDROPYRANS: LEWIS ACID-CATALYZED CYCLOADDITIONS OF α,β-UNSATURATED ACYL CYANIDES TO SIMPLE UNACTIVATED OLEFINS AND DIENES. PRACTICAL ROUTE TO DERIVATIVES OF ROSE OXIDE (1983) (0)
Asymmetric Synthesis of the C1—C16 Segment (I) of Lasonolide A. (2000) (0)
THERMODYNAMISCH INSTABILE ENOLE, 2-METHYL-PENTEN-(2)-OLE-(3) AUS 4-ISOPROPYLIDEN-5,5-DIMETHYL-2-DIMETHYLAMINO-1,3-DIOXOLAN (1973) (0)
Lipase-Mediated Desymmetrization of meso 2,6-Di(acetoxymethyl) tetrahydropyran-4-one Derivatives. An Innovative Route to Enantiopure 2,4,6-Trifunctionalized C-Glycosides. (1997) (0)
Spiro(cyclopropane-1,4′-(2)oxabicyclo(3.2.0)hept-1(5)-en)-3′-one and Its δ1,7-Isomer from Diastereomeric Selenoxides. (1994) (0)
NEUE TROPINON-SYNTH. (1974) (0)
THE SYNTHESIS OF ALIPHATIC DICARBOXYLIC ACID DIIODIDES AND AROMATIC ANALOGS (1982) (0)
Regioselective Preparation of Iodinated Phloroglucinols. (1992) (0)
Synthesis and Reactions of a-Methylene -Keto Sulfones. (1991) (0)
Crystal structures of ethanol hemisolvates of (1S,3R,4S,8S,9R)-1N-boranyl-6'-methoxy-cinchonan-9-ol,C20H27BN2O2 center dot 1/2C(2)H(5)OH, and (1S,3S,4S,8S,9R)-1N-boranyl-10,11-didehydro-6 '-methoxy-cinchonan-9-ol, C20H25BN2O2 center dot 1/2C(2)H(5)OH (2005) (0)
Highly Diastereoselective Aldol Reaction of Bicyclo(3.2.1)oct-6-en-3- ones and 8-Oxabicyclo(3.2.1)oct-6-en-3-ones. (E)-Selective Conversion into α-Alkylidene Ketones. (1994) (0)
CYCLOADDITIONS OF ALLYL CATIONS. 28. NOVEL DIELS-ALDER ADDITIONS VIA ACID CATALYZED REACTIONS OF 4-METHYL-3-PENTEN-2-OL WITH CYCLOPENTADIENE AND CYCLOHEXADIENE IN TWO PHASES. FORMATION OF MONOCYCLIC, BICYCLIC, AND TRICYCLIC ADDUCTS AN (1981) (0)
Synthesis of Enantiopure 1‐Azabicyclo[3.2.2]nonanes via Stereoselective Capture of Chiral Carbocations. (2000) (0)
SYNTHESIS OF CYCLOBUTYLIDENEACETIC ESTERS VIA ALUMINUM CHLORIDE PROMOTED (2+2) CYCLOADDITIONS OF ETHYL 2,3-BUTADIENOATE TO OLEFINS (1981) (0)
DABCO-CATALYZED COUPLINGS OF ACRYLIC ACID ESTERS WITH ALDEHYDES. 2. NEW STEREOCONTROLLED SYNTHESIS OF ALKENES WITH TRISUBSTITUTED DOUBLE BONDS VIA FUNCTIONALIZED ACRYLIC ACID ESTERS (1984) (0)
Cover Picture: Recent Advances in Cinchona Alkaloid Chemistry (Eur. J. Org. Chem. 21/2004) (2004) (0)
Inactivated Terpenes as 2π Components in Intermolecular Hetero Diels-Alder Reactions. A Short Stereocontrolled Approach to the Robustadial and Euglobal Skeleton. (1992) (0)
Crystal structure of 2(R),3(S),4(R),4a(R),4b(R),5(R),8a(S),9a(S)-2- acetoxymethyl-5-tri-methylsilyI-7-iodo-3,4,4a,4b,5,8,8a,9a-octahydro- 2H-pyrano[2,3-b]-benzofuran-3,4-diol diacetate, C21H31lO8Si (1997) (0)
The Total Syntheses of Phorboxazoles — New Classics in Natural Product Synthesis. (2003) (0)
Synthesis of Bridged Nine‐Membered Ring Ethers: Studies Directed Towards the Synthesis of Eunicellin‐Based Marine Diterpenes. (1997) (0)
Structure and Mechanism in Cinchona Alkaloid Chemistry: Overturning a 50‐Year‐Old Misconception (1999) (0)
Dimethyl 2,3-Dimethylenebutanedioate from Methyl Pyruvate and Methyl Acrylate. (1987) (0)
ENDO SELECTIVITY OF ALLENIC ESTERS IN DIELS-ALDER ADDITIONS TO CYCLOPENTADIENE. THE EFFECT OF ADDED ALUMINUM TRICHLORIDE AND AN APPROACH TO DEHYDROSANTALEN ANALOGS (1982) (0)
Samarium Diiodide Mediated Pinacolization of 1,4‐Diketones. Part 1. Stereoselective Synthesis of Fused Mono‐, Bi‐ and Tricyclic Cyclobutane‐1,2‐diols. (1996) (0)
Ultrasonics in the Metal Promoted Cycloaddition of α,α‐Dibromo Ketones to 1,3‐Dienes. (1986) (0)
Synthesis and Reactions of Novel Tricyclo(4.3.1.12,5)undec-3-en-10- ones. (1991) (0)
REACTIVE IODINE COMPOUNDS. PART 2. SYNTHESIS OF ACYL CYANIDES FROM ACYL IODIDES (1982) (0)
New Members of the Caryophyllene Family via Biomimetic π‐Cyclizations and Consecutive Transformations. (1993) (0)
Asymmetric Synthesis of the C(10)‐C(16) Segment of the Bryostatins. (1997) (0)
Tandem Radical Mediated 5-exo-trig, 6-endo-dig Cyclization. Stereoselective, α-Trimethylsilyl Effect and the Product Spread. Part 4. (2010) (0)
DABCO-Catalyzed Coupling of Aldehydes with Activated Double Bonds. Part 4. Stereoselective Synthesis of Trisubstituted Olefins and Terpenoid Building Blocks via 2-(Hydroxyalkyl)-2-propenoic Esters. (1986) (0)
DABCO-Catalyzed Coupling of Aldehydes with Activated Double Bonds. Part 7. Stereoselective Synthesis of (E)-3-Methylene-4-alken-2-ones from Aldehydes and Methyl Vinyl Ketone and Their Spontaneous Dimerization. (1988) (0)
CYCLOADDITIONS OF ALLYL CATIONS. 21. SYNTHESIS AND PROTON NMR SPECTRA OF BICYCLO(3.2.1)OCTA-2,6-DIENES AND 3-METHYLENEBICYCLO(3.2.1)OCT-6-ENES FROM BICYCLO(3.2.1)OCT-6-EN-3-ONES METHYLATED AT C-2 AND C-4 (1981) (0)
Crystal structure of 1,8-dimethyl-7α-methoxy-10α-(triisopropylsilyloxy)- (2β) - 12-oxatricyclo[6.3.1.02,7] dodecane-3β,4α-diol, [(C3H7)3SiO](CH3)2(OH)2(OCH3)(C11H12O) (2000) (0)
A Synthesis of Annulated Dihydropyrans via Hetero Diels‐Alder Reaction. A Simple Approach to Alboatrin Models. (1991) (0)
REACTIVE IODINE COMPOUNDS. 6. SYNTHESIS OF α,β-UNSATURATED AND OTHER REACTIVE ACYL CYANIDES (1983) (0)
Samarium Diiodide‐Mediated Pinacolization of Diketones. Part 2. Synthesis of Polycyclic Frameworks Containing a Cyclobutane‐1,2‐diol and a Cyclopentane‐1,2‐diol. (1996) (0)
Organically Modified Antimony(III) Sulfides. Molecules on the Path to Solid-State Structures (1989) (0)
Synthesis of Enantiopure 3-Quinuclidinone Analogues with Three Stereogenic Centers: (1S,2R,4S)- and (1S,2S,4S)-2-(Hydroxymethyl)-1-azabicyclo[2.2.2]octan-5-one and Stereocontrol of Nucleophilic Addition to the Carbonyl Group. (2000) (0)
THE ALLYL CATION ROUTE TO SEVEN-MEMBERED RINGS. 15. MONOTERPENOIDS VIA CONCURRENT 4+3→7 AND 3+2→5 CYCLIZATIONS (1977) (0)
Antimon Containing Heterocycles. Part 3. Phenylated Stibocanes, ψ-Octaedrical 5- and ψ-Monocapped-octaedric 6-Coordination at Antimon(III). (1986) (0)
Stereocontrolled Synthesis of Heteroannular Acetals from Functionalized 1,5-Enynes via Radical Cascades — Construction of Quaternary and 1,2-Diquaternary Centers in Polycyclic Systems. (2000) (0)
Dimerization of (E)-2-Benzenesulfonyl-1,3-alkadienes. The Benzenesulfonyl Group Exerts Acyclic Stereocontrol. (1990) (0)
Non‐Stabilized Azomethine Ylides in [3 + 2] Cycloadditions. Pyrrolidinylfuranones from (5S)‐5‐Menthyloxy‐4‐vinylfuran‐2(5H)‐one. (1999) (0)
From Quinidine to New Enantiopure Materials ‐ Tricyclic Allylic N,O‐ Acetals and a Stereospecific, One‐Pot Conversion of 1,2‐Secondary, Tertiary Diols into Spiroepoxides. (1996) (0)
Versatile 8‐Oxabicyclo[3.2.1]oct‐6‐en‐3‐one: Stereoselective Methodology for Generating C‐Glycosides, δ‐Valerolactones, and Polyacetate Segments. (2001) (0)
Ring-Chain Tautomerism Provides a Route to 7a-Hydroxy-3a-methyl-2,7- dioxoperhydrobenzofuran. Synthesis of the Hydroxy γ-Lactone Substructure of Myrocin and Other Bioactive Natural Products. (2010) (0)
Regio- and Stereoselective Transformations of 3,3,5,5-Tetramethylcyclohexane Derivatives: Oxygenations, Annulations and SN2′ Reactions. (1988) (0)
Cyclopropanes by Nucleophilic Attack of Mono‐ and Diaryl‐Substituted (. eta.3‐Allyl)palladium Complexes: Aryl Effect and Stereochemistry. (1994) (0)
THE ALLYL‐CATION ROUTE TO SEVEN‐MEMBERED RINGS. 18. 9,10‐DIHYDRO‐9,10‐PROPANOANTHRACENES (1979) (0)
Intramolecular Diels-Alder Reaction of a Sulfonyl-Activated 1,3,9-Triene. (1990) (0)
TERPENES AND TERPENOID COMPOUNDS, 17. PREPARATION OF OXYGENATED TETRAMETHYLMENTHENES AND TETRAMETHYLMENTHADIENES (1985) (0)
Synthesis of Enantiopure C-Glycosides and Pseudo C-Glycosides: Lewis Acid Mediated Heterolysis of Methyl Acetals. (1999) (0)
Diastereoselective Synthesis of Functionalized 9‐Ring Ethers (Oxonins). (1995) (0)
On Heterocycles Containing Antimony. Part 7. 2-Phenyl-1,3-dithia-2-stibolane ∞ 1 Helical-Connected Five-Ring Units. (1987) (0)
Synthesis of Rosethiophene (I), a New Flavour Compound. (1986) (0)
A Ring Contraction of 6-Alkoxy-2,3-dihydro-6H-pyran-3-ones to Polyfunctionalized Cyclopentenones. (1990) (0)
Diastereoselective Route to Enantiomerically Pure Homoallylic Pinene Alcohols (III) from Myrtenyl Bromide (I) and Aldehydes (II). (1991) (0)
3-Hydroxy-2-methylenecycloalkanones. Preparation and Dehydrative Dimerization to Bisannulated 6,8-Dioxabicyclo(3.2.1)octanes. (1991) (0)
Vicinal Bromopropargoxylation of Cyclic Olefins and Cobaloxime-Mediated Heteroannulation to Functionalized 3-Methyleneoxacyclopentanes. (1990) (0)
Aflatoxins Revisited: Convergent Synthesis of the ABC Moiety (1989) (0)
Asymmetric Synthesis of Polyacetate Derived Building Blocks with α‐Oxyanion Functionality. Lewis Acid Catalyzed Opening of 2,9‐Dioxabicyclo[3.3.1]nonan‐3‐ones. (1999) (0)
IMPROVED PROCEDURE FOR THE GENERATION OF ALLYL CATIONS FROM SIMPLE DIBROMO KETONES. CHANGE OF MECHANISM ON REACTION WITH TRIETHYL BORATE AND ZINC. CYCLOADDITIONS TO CONJUGATED DIENES (1976) (0)
Stereocontrolled Construction of 6×5×6 and 5×5× 6 Ring Systems by Radical Tandem Cyclization. (1992) (0)
2,2,4,4‐TETRAMETHYL‐3‐METHYLENEBICYCLO(3.2.1)OCT‐6‐ENE (1985) (0)
Radical Cascades in Synthesis. Dioxatriquinanes and Doubly-Annulated Glycosides by Triethylborane-Induced Atom Transfer Cyclization of 1,5- Enynes and 1,5-Diynes. (1995) (0)
CYCLOADDITIONS OF ALLYL CATIONS. 26. NORBORNENE DERIVATIVES FROM CYCLOPENTADIENE AND 2,4-DIMETHYL-3-PENTEN-2-OL IN AN ACIDIC TWO-PHASE SYSTEM. A STEPWISE DIELS-ALDER-LIKE CYCLIZATION (1981) (0)
8‐Oxabicyclo[3.2.1]oct‐6‐en‐3‐ones: Application to the Asymmetric Synthesis of Polyoxygenated Building Blocks (2004) (0)
Synthesis of Oxazatwistanes and Their Homo- and Bishomo-Analogues from Quinidine — Medium Ring Systems Derived from Cinchona Alkaloids. (2010) (0)
FAVORSKY REARRANGEMENT UNDER REFORMATSKY CONDITIONS, THE ZINC-INDUCED DEBROMINATION OF 1,3-DIBROMO-1,1-DIPHENYLPROPAN-2-ONE IN METHANOL AS SOLVENT (1975) (0)
Toward the Total Synthesis of Disorazole A1 (I): Asymmetric Synthesis of the Masked Northern Half (II). (2004) (0)
On the Way to Aflatoxins and Related Structure Types. Regiocontrolled Annulations by Application of Homogenous Palladium Catalysis, Urethane Tether and ortho,ortho′-Diiodine Effect. (1992) (0)
Synthesis of the C29—C37 Segment of Spongistatin 1. (1999) (0)
Preparation and Selected Reactions of tert‐Butyl 2‐Methylene‐3‐oxoalkanoates. (2010) (0)
Trispiro[2.1.2.1.2.1]dodecan‐4,8,12‐trion. (1985) (0)
Total Synthesis of Dictyodendrillin-B. (2010) (0)
Unusual Variant of the Favorsky Rearrangement. Formation of α‐Keto Acetals. (1997) (0)
Starburst Spiroannulation and X-Ray Crystal Structure of 6- Cyclopropylidene-5-oxaspiro(2.3)hexan-4-one. (2010) (0)
Chiral Allyl Cations in Cycloadditions to Furan: Synthesis of 2-(1′-Phenylethoxy)-8-oxabicyclo[3.2.1]oct-6-en-3-one in High Enantiomeric Purity. (1998) (0)
Synthesis of Nonenolizable 6-Hydroxy-2,4-cycloheptadien-1-ones. (1992) (0)
A new approach to dehydrocamphenilone and camphenilone (1982) (0)
CCDC 251074: Experimental Crystal Structure Determination (2005) (0)
[4 + 3] Cycloadducts from Lewis Acid Mediated Reactions of Acroleins with Cyclopentadiene (2005) (0)
Synthesis of Enantiopure C-Glycosides and Pseudo C-Glycosides. Lewis Acid Mediated Cleavage of [3.3.1] Oxabicyclic Lactones. (1999) (0)
Crystal structure of 8-benzenesulfonyl-9,11,11-trimethyl-2,10,12-trioxa-tricyclo[7.2.1.01,6]dodecane, C18H24O5S (1996) (0)
Asymmetric Synthesis of a Seven Carbon anti-3,5-Diol Building Block. A Polyacetate Derivative with Completely Resolved C2 Symmetry. (2010) (0)
ONE STAGE SYNTHESIS OF BICYCLO(3.2.2)NONA-6,8-DIEN-3-ONES, THE SILVER TRIFLUOROACETATE INDUCED REACTION OF 2-METHOXYALLYL BROMID WITH ARENES (1974) (0)
THE ALLYL CATION ROUTE TO SEVEN-MEMBERED RINGS. 17. ONE-POT SYNTHESIS OF NOVEL MONOTERPENOID ETHERS (1978) (0)
Stereoconvergent Synthesis of Enantiopure (-)-trans-Lauthisan (VII). Building Kit for Medium Ring Oxacycle Construction and Contrathermodynamic Epimerization at Allylic Carbon C(8) via “ Invisible”, E-Configurated Medium Ring Olefin. (1995) (0)
OCTAMETHYL-1,4-CYCLOHEXANEDIONE (1976) (0)
Synthesis of Homobenzoctamine (9,10‐Dihydro‐9‐(1‐methylaminomethyl)‐9, 10‐propanoanthracene) and Homomaprotiline (9,10‐Dihydro‐9‐(3‐ methylaminopropyl)‐9,10‐propanoanthracene). (1993) (0)
CCDC 246626: Experimental Crystal Structure Determination (2008) (0)
Unified Approach Towards Medium Ring Allylic Ethers. Stereoselective Synthesis of 2,10‐Dialkylated (E)‐Oxacyclodec‐3‐enes by Palladium Catalyzed Cyclization. (1998) (0)
Remote 1,5-Induction and Steric Approach Control in Horner-Wadsworth- Emmons Reactions. The Stereoselective Construction of Trisubstituted, Exocyclic Double Bonds from Unsymmetric Cyclic Ketones. (1997) (0)
CYCLOADDITION OF ALLYL CATIONS. 23. SYNTHESIS OF NORBORNENE DERIVATIVES FROM CYCLOPENTADIENE AND ALLYL ALCOHOLS IN AN ACIDIC TWO-PHASE SYSTEM (1981) (0)
SIMPLE SYNTHESIS OF 7,7-DIMETHYL-6-METHYLENETRICYCLO(6.2.1.01,5)UNDEC-9-ENE AND ZIZAENE-TYPE SESQUITERPENES (1982) (0)
Selected Transformations of 6-Cyclopropylidene-5-oxaspiro(2.3)hexan-4- one (II), a Highly Strained Tricyclic β-Lactone. (1994) (0)
Highly Alkylated Cyclohexanes. ‐ X‐Ray Crystal Structures, Force‐Field Calculations, and Conformations of cis/trans‐1,4‐Disubstituted Cyclohexane Isomers (1988) (0)
Synthesis of Unsaturated Nine-Membered Ring Ethers (Δ3-Oxonenes) Containing a Z- or E-Configurated Double Bond: Thermodynamic versus Kinetic Control in Palladium-Catalyzed Allylic Cyclizations. (1998) (0)
Synthesis of Acyclic, Multifunctionalized α,α′‐Disecondary Ethers with Full Control of Chemo‐, Regio‐ and Enantioselectivity. (1995) (0)
Crystal structure of (3S,8R,9R)-3,9-dihydroxy-6'-methoxy-3-phenyl-10,11-dinorcinchonane hemihydrate, (C24H26N2O3) · 0.5H2O (1998) (0)
Synthesis of the C38—C44 Segment of Altohyrtin A — With an Addendum on the Preparation of 8-Oxabicyclo[3.2.1]oct-6-en-3-one. (2001) (0)
Synthesis of Tricyclic N,O‐Acetals from α‐Functionalized Rubanone. A Masked 1,2,3‐Tricarbonyl System from Quinidine. (1998) (0)
THE ALLYL CATION ROUTE TO SEVEN-MEMBERED RINGS. 16. SOLVENT EFFECTS ON REGIOSELECTION IN 4 + 3 → 7 CYCLIZATIONS. A STEPWISE REACTION OF TRANS-1,3-PENTADIENE (1978) (0)
Synthesis of 9,10‐Dihydro‐9,10‐propanoanthracene‐12‐ones from Anthracenes and Oxyallyl Cation Intermediates Generated by the BSA (N, O‐Bis(trimethylsilyl)acetamide) Method. (1995) (0)
Improved Procedure for the Synthesis of 6-Alkoxy-2,3-dihydro-6H-pyran-3-ones (2,3-Dideoxy-DL-pent-2-enopyranos-4-uloses). Neat Conversion into Polyfunctionalized Cyclopentenones. (1990) (0)
High Regio-, Chemo-, and Stereoselectivity via Low-Temperature [4 + 3] Cycloadditions. Convergent Synthesis of Multifunctionalized Vinylmetals (M: Si, Sn) and S-Vinyl Benzenecarbothioates. (2000) (0)
Intramolecular Enyne Diels‐Alder Reaction. Stereoselective Construction of Tricyclic Dioxadienones and Mechanistic Outline. (1994) (0)
The Reagent. Part 12. N,O‐Bis(trimethylsilyl)acetamide (BSA) ‐ A Mild Silyl Transfer Reagent (1995) (0)
DABCO-Mediated Synthesis and Biological Activity of Cyanohydrin Esters. (1990) (0)
TERPENES AND TERPENOID COMPOUNDS, 15. PREPARATION OF TETRAMETHYLATED PERILLYL ALCOHOL (3,3,5,5-TETRAMETHYL-4-(1-METHYLETHENYL)-1-CYCLOHEXENE-1-METHANOL) AND RELATED MONOTERPENOIDS (1985) (0)
One-Pot Preparation of α-Cyanovinyl Ethers (2-Alkoxy-2-alkenenitriles) from Vinyl Ethers: Elaboration to 3-Alkoxy-2-oxo-3-alkenenitriles and Aluminium Chloride- Catalyzed Cycloadditions to Cyclopentadiene. (1986) (0)
CCDC 252354: Experimental Crystal Structure Determination (2008) (0)
Diastereoselective Synthesis of Methylated α‐Methoxy‐8‐oxabicyclo[3.2.1]oct‐6‐en‐3‐ones. Contrathermodynamic Introduction of Methoxy Group by Low Temperature [4 + 3] Cycloaddition. (1999) (0)
CYCLOADDITIONS OF ALLYL CATIONS. 27. DEHYDRATIVE CYCLODIMERIZATION OF 4-METHYL-3-PENTEN-2-OL IN TWO PHASES. ONE-POT PREPARATION OF DIMETHYLATED LIMONENES AND α-TERPINEOL (1981) (0)
Chiral, Nonracemic Bridgehead Amine: Bridgehead Olefin of a New Tricyclic Sesquiterpene (1991) (0)
CYCLOADDITION UND REAKTIVITAET VON 2-METHOXY-ALLYLHALOGENIDEN (1973) (0)
Crystal structure of 2(R),3(S),4(R),4a(R),4b(R),5(R),8a(S),9a(S)-2- acetoxymethyl-5-tri-methylsilyI-7-iodo-3,4,4a,4b,5,8,8a,9a-octahydro- 2H-pyrano[2,3-b]-benzofuran-3,4-diol diacetate, C21H31lO8Si (1997) (0)
Heterocyclic Systems Containing Antimony. Part 5. Antimony(III) Dithiolates with Bridged 5- and 8-Membered Rings. (1987) (0)
The Facile 1,5-Hydrogen Shift in 6-Hydroxy-2,4-cycloheptadien-1-ones. (1992) (0)
8-Oxabicyclo[3.2.1]oct-6-en-3-one as a Module for the Synthesis of β-Alkoxy-δ-valerolactones Relevant to Natural Products and Drugs. (1998) (0)
Trispiro(2.1.2.1.2.1)dodecane-4,8,12-trione and Other Oligomers of Carbonylcyclopropane. The Organozinc Route. (1990) (0)
Progress Towards a Convergent and Flexible Synthesis of Afm1 (1990) (0)
Chiral, Nonracemic Bridgehead Amine: Bridgehead Olefin of a New Tricyclic Sesquiterpene. (1992) (0)
CYCLOADDITIONS OF CYCLIC ALLYLIC CATIONS TO FURAN, CONFIGURATION AND CONFORMATIONAL ANALYSIS OF THE RESULTING BRIDGED SIX-MEMBERED RINGS, ISOLATION AND IDENTIFICATION OF BOAT AND CHAIR ATROPISOMERS (1974) (0)
Strained Ketenes from α-Bromoacyl Phosphates. (Tricyclo(4.4.1.01,6)undeca-3,8-dien-11-ylidene)methanone and Its Heptacyclic Dimer: A Dispirobridged Dipropellane (1,1′′,4,4′′,5,5′′,8,8′′-Octahydrodispiro((4a,8a)methanonaphthalene-9,1′- (1989) (0)
The Three-Component Condensation of Monoterpenes with Formaldehyde and Cyclohexane-1,3-dione. A Simple Route to Polyketide Terpenes. (1994) (0)
REACTIVE IODINE COMPOUNDS. 7. THE SYNTHESIS OF IODOGLYOXALIC ESTERS. CLEAVAGE OF TETRAHYDROFURAN AND 1,2-DIMETHOXYETHANE (1984) (0)
CYCLOADDITIONS OF ALLYL CATIONS. 29. ACID-CATALYZED REACTIONS OF 2,3-DIMETHYL-3-PENTEN-2-OL AND CYCLOPENTADIENE IN TWO PHASES. FORMATION OF SEVEN- AND FIVE-MEMBERED RINGS (1981) (0)
Nucleophilic Organosilicon Intermediates Turned Electrophilic: (Trimethylsilyl)methyl, Trimethylsilyloxy and also 2-Tetrahydropyranyloxy as Terminators of Cycloadditions of Allyl Cations. A Short Route to Dehydrozizaenes (6-Methylenet (1988) (0)
Novel Deprotection of SEM Ethers: A Very Mild and Selective Method Using Magnesium Bromide. (2000) (0)
Sodium Iodide–Copper (2001) (0)
Regioselective Preparation of Vinylcyclopentadienes and Selected Cycloadditions. (1987) (0)
Cross‐Coupling Reactions in Cinchona Alkaloid Chemistry: Aryl‐Substituted and Dimeric Quinine, Quinidine, as well as Quincorine and Quincoridine Derivatives. (2001) (0)
Reactions of Isobenzofurans and Isoindoles: Cycloadditions with Oxyallyl Cations from Two Different Sources and Preferred Extended Attack to N-tert-Butylisoindole. (1991) (0)
The Enol Lactone Approach to Protected Hydroxy γ‐Lactones (5‐ Hydroxy‐dihydro‐furan‐2‐ones). (1997) (0)
CYCLOADDITIONS OF ALLYL CATIONS. PART 30. A NOVEL APPROACH TO COMPLEX TERPENOID METHYLENECYCLOHEXANES (1982) (0)
Synthesis and π-Facially Selective Cycloadditions of Pinofurans. (1989) (0)
REGIO‐CONTROLLED PRENYLATION AND ALKYLATIONS OF FURANS: PREPARATION OF ROSEFURAN AND NEW ANALOGS (1984) (0)
A New Synthesis of Functionalized 6,8-Dioxabicyclo(3.2.1)octanes. (1988) (0)
1,4-DIAZABICYCLO(2.2.2)OCTANE-CATALYZED COUPLING OF ALDEHYDES AND ACTIVATED DOUBLE BONDS. PART 3. A SHORT AND PRACTICAL SYNTHESIS OF MIKANECIC ACID (4-VINYL-1-CYCLOHEXENE-1,4-DICARBOXYLIC ACID) (1984) (0)

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