Ludger Ernst
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- Bachelors Computer Science University of Oxford
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(Suggest an Edit or Addition)Ludger Ernst'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
- 13C-NMR- Spektroskopie (1980) (374)
- Spice: a never ending story? (2009) (304)
- Hydrolysis in the system LiPF6—propylene carbonate—dimethyl carbonate—H2O (2005) (248)
- Chemotypes of two pyrrolizidine alkaloid-containing Senecio species (1992) (122)
- High-resolution proton-coupled 13C NMR spectra of monosubstituted benzenes. Theoretical and empirical correlations of JCH (1977) (91)
- Identification and characterization of JWH-122 used as new ingredient in "Spice-like" herbal incenses. (2011) (90)
- Pyrrolizidine alkaloids: different acquisition and use patterns in Apocynaceae and Solanaceae feeding ithomiine butterflies (Lepidoptera: Nymphalidae) (1996) (75)
- Identification and quantification of synthetic cannabinoids in 'spice-like' herbal mixtures: a snapshot of the German situation in the autumn of 2012. (2014) (66)
- Transformation of plant pyrrolizidine alkaloids into novel insect alkaloids by Arctiid moths (Lepidoptera) (1990) (62)
- Carboncarbon spin-spin coupling constants in monosubstituted benzenes (1980) (61)
- Protonenresonanz-Untersuchungen zur inneren Rotation, VIII. Konformationsanalyse α.α.o.o′-tetrasubstituierter Toluole mittels magnetischer Kernresonanz und halbempirischer Energieberechnung (1971) (59)
- Acquired and Partially De Novo Synthesized Pyrrolizidine Alkaloids in Two Polyphagous Arctiids and the Alkaloid Profiles of Their Larval Food-Plants (2004) (58)
- Analysis of synthetic cannabinoids in “spice-like” herbal highs: snapshot of the German market in summer 2011 (2012) (56)
- Synthetic cannabinoids in "spice-like" herbal blends: first appearance of JWH-307 and recurrence of JWH-018 on the German market. (2012) (56)
- Pyrrolizidine alkaloids in the food chain: development, validation, and application of a new HPLC-ESI-MS/MS sum parameter method. (2013) (54)
- The complete 13C 19F, and 1H spectral analysis of the fluorobenzenes C6HnF6−n. III. The remaining members of the series; INDO MO calculations of JFH, JFF, JCH, and JCF (1977) (53)
- 13C n.m.r. spectroscopy of diethyl alkyl- and benzyl-phosphonates. A study of phosphorus–carbon spin–spin coupling constants over one to seven bonds (1977) (53)
- Cinnamate:CoA Ligase Initiates the Biosynthesis of a Benzoate-Derived Xanthone Phytoalexin in Hypericum calycinum Cell Cultures1[W][OA] (2012) (51)
- 13C-NMR-Spektroskopie an polycyclischen Aromaten, I. Naphthole, Naphthalindiole und Monomethoxynaphthaline. Vollständige Zuordnung der 13C-NMR-Spektren und Untersuchung der Substituenteneffekte auf die chemischen Verschiebungen (1975) (50)
- NMR Studies of Cyclophanes (2000) (47)
- Differential effect of elicitors on biphenyl and dibenzofuran formation in Sorbus aucuparia cell cultures. (2010) (47)
- Identification and quantification of synthetic cannabinoids in "spice-like" herbal mixtures: Update of the German situation for the spring of 2016. (2016) (45)
- Sila‐Pharmaka, 371) Darstellung und Eigenschaften der Enantiomere der Antimuskarinika Sila‐Procyclidin und Sila‐Tricyclamol‐iodid: Optisch aktive Silanole mit Silicium als Chiralitätszentrum2) (1987) (41)
- 13-(Trifluoromethyl)retinal forms an active and far-red-shifted chromophore in bacteriorhodopsin (1981) (40)
- A NEW QUANTITATIVE DESCRIPTION OF THE DISTANCE DEPENDENCE OF THROUGH-SPACE19F, 19F SPIN-SPIN COUPLING (1995) (37)
- Identification and quantification of synthetic cannabinoids in “spice-like” herbal mixtures: update of the German situation for the spring of 2015 (2015) (35)
- 13C NMR spectroscopy of polycyclic aromatics VII. Naphthalenes carrying electron-withdrawing substituents. Correlations between substituent-induced shifts and INDO MO charge densities (1976) (35)
- Intermediate Steps pf Microbial Lignin Degradation as Elucidated by 13C NMR Spectroscopy of Specifically 13C-Enriched DHP-Lignins (1985) (34)
- Beiträge zur Kenntnis des chromophoren Systems der Corrine, IV. Über die partielle, reversible Ringöffnung am Dicyano‐cobyrin‐säure‐heptamethylester mit intermediärer reversibler Entfernung des Cobalts (1979) (33)
- 13C NMR spectroscopy of polycyclic aromatics. V. The 13C NMR spectra of mono- and dihalonaphthalenes (1975) (33)
- Synthesis of galanthamine and related alkaloids - new approaches. I. (1989) (32)
- Cyclophane, XXI1). Über das chemische Verhalten von [8]Paracyclophan: Reaktionen des Benzolrings (1984) (31)
- Preparation and Structure of a Diphosphorus Compound with Positive Charges on the Two Directly Bonded Phosphorus Atoms (1985) (28)
- New trans-fused africanols from leptographium lundbergii (1986) (27)
- Intramolecular reactions in pseudo-geminally substituted [2.2]paracyclophanes. (2007) (27)
- Deuterium isotope effects on carbon-13 chemical shifts in cyclophanes. Deshielding intrinsic through-space and through-bond effects (1982) (27)
- Retinoids. 6. Preparation of alkyl- and trimethylsilyl-substituted retinoids via conjugate addition of cuprates to acetylenic esters (1987) (27)
- Reaction of dicyanocobyrinic heptamethyl ester with ascorbic acid. (1977) (26)
- 13C NMR spectroscopy of polycyclic aromatics. VI. Coumarin and the methylcoumarins (1976) (26)
- Identification and quantification of synthetic cannabinoids in 'spice-like' herbal mixtures: Update of the German situation in early 2017. (2017) (26)
- Cyclophane, XXII1,2). Über das chemische Verhalten von [8]Paracyclophan: Reaktionen der Polymethylenbrücke (1984) (26)
- Nuclear Magnetic Resonance Spectroscopy for Structure Elucidation of Vitamin B12 Derivatives: Complete Interpretation of the 13C-NMR Spectrum of Dicyanocobyrinic Acid Heptamethyl Ester and Partial Assignment of Its 1H-NMR Spectrum† (1981) (26)
- The complete 13C, 19F, and 1H spectral analysis of the fluorobenzenes C6HnF6−n. II. 1,2-Difluorobenzene. INDO MO calculations of JHH in these fluorobenzenes and related molecules (1976) (25)
- Cyclophane series. Part 24. [2.2](1,4)Phenanthrenoparacyclophane: synthesis and two-dimensional proton and carbon-13 NMR study (1985) (25)
- Molecular Cloning and Characterization of a Xanthone Prenyltransferase from Hypericum calycinum Cell Cultures (2015) (25)
- A novel entry into a new class of cyclophane derivatives: synthesis of (±)-[2.2]paracyclophane-4-thiol ☆ (2001) (24)
- Microbial oxidation of tricyclic sesquiterpenoids containing a dimethylcyclopropane ring (1992) (24)
- New stereoisomers of quinic acid and their lactones (1991) (24)
- [P4Aryl6][Me3SnF2]2 (Aryl = 2,6‐(MeO)2C6H3): An Unusual Ion Pair Consisting of a Planar 2,4‐Diphospha‐1,3‐diphosphoniacyclobutane Dication and the Difluorotrimethylstannate Anion (1989) (23)
- Thiocarbonyl‐Olefinierung, II. Einige präparative Anwendungen der Reaktion von N‐(Thioacyl)urethanen und deren Vinylogen mit resonanzstabilisierten Phosphor‐Yliden (1979) (23)
- Extracellular metal-free corrinoids from Rhodopseudomonas spheroides. (1980) (23)
- Identification and quantification of synthetic cannabinoids in 'spice-like' herbal mixtures: Update of the German situation in summer 2018. (2019) (21)
- Sterically Fixed Retinal‐Analogue Prevents Proton‐Pumping Activity in Bacteriorhodopsin (1984) (21)
- Biotransformation of caryophyllene by Diplodia gossypina (1990) (21)
- Singly and doubly twisted [36]annulenes: synthesis and calculations. (2010) (20)
- Sila-Pharmaka, XIX. Sila-Pridinol und Pridinol: Darstellung und Eigenschaften sowie Strukturen im kristallinen und gelösten Zustand (1980) (20)
- syn-ar,ar′-Difluorometacyclophanes: Strong 19F,19F Spin—Spin Interactions Transmitted through Space† (1994) (20)
- Structural and quantitative analysis of Equisetum alkaloids. (2015) (20)
- Selenol nitrosation and Se-nitrososelenol homolysis: a reaction path with possible biochemical implications. (2004) (20)
- 4,15‐Diamino[2.2]paracyclophane as a Starting Material for Pseudo‐Geminally Substituted [2.2]Paracyclophanes (2003) (20)
- Isotope effects of benzylic deuterons on chemical shifts of ortho carbons. Correlation with .pi. bond orders as an indication of a hyperconjugative contribution (1983) (20)
- 13C-NMR-Spektroskopie an polycyclischen Aromaten, IIΙ Die 13C-NMR-Spektren von Amino- und Dimethylaminonaphthalinen /13C NMR Spectroscopy of Polycyclic Aromatics, III The 13C NMR Spectra of Amino- and Dimethylaminonaphthalenes (1975) (19)
- Rearranged caryophyllenes by biotransformation with Chaetomium cochliodes (1990) (19)
- Comparison of the Action of Phanerochaete chrysosporium and its Extracellular Enzymes (Lignin Peroxidases) on Lignin Preparations (1989) (19)
- New Cycloadditions of (E)‐N,α‐Dimethyl‐α‐(4‐[2.2]paracylophanyl)nitrone (2006) (19)
- Novel Synthesis of Phenanthrenoparacyclophanes and Phenanthrenophanes and a Study of Their NMR Properties (2000) (19)
- [6]Radialenes Revisited (2003) (19)
- A 1H, 13C, and 15N NMR spectral analysis of 15N-nitrobenzene (1976) (18)
- Paracyclophanes: Extending the Bridges. Synthesis (2009) (18)
- Structure and Reactivity of Xanthocorrinoids. Part II. Influence of the c‐acetic‐acid chain on the course of the hydroxylation of the corrin chromophore by oxygen in the presence of ascorbic acid (1985) (18)
- Pyrrolizidine alkaloids of the endemic Mexican genus Pittocaulon and assignment of stereoisomeric 1,2-saturated necine bases. (2008) (18)
- Biosynthesis of the biphenyl phytoalexin aucuparin in Sorbus aucuparia cell cultures treated with Venturia inaequalis. (2013) (17)
- A Simple Route to a Pyridinyl[2.2]paracyclophane (2005) (17)
- 1H, 13C and 19F NMR study of ar,ar′‐difluoro[2.2]paracyclophanes, ar,ar′‐difluoro‐2,11‐dithia[3.3]paracyclophanes and their monofluoro analogues. Long‐range 19F,19F spin–spin coupling (1997) (17)
- Long-range Spin-Spin Coupling Constants from Amino Protons and 15N to Ring Protons in Aniline-15N and Some Derivatives. INDO Molecular Orbital Calculations (1972) (17)
- SYNTHESIS AND STRUCTURE OF THE FIRST TRANS-1,2-DIHYDRO-1,2,3-TRIPHOSPHETE-TUNGSTEN COMPLEX (1995) (16)
- The conformational equilibrium of [2.2]paracyclophanes in solution (1995) (16)
- Reaktion von Dicyanocobyrinsäure‐heptamethylester mit Ascorbinsäure (1977) (16)
- A flexible hydroazulene synthesis (1988) (16)
- Revised structure of the main alkaloid of senecio adonidifolius (1992) (16)
- Cyclophanes, XXXV. DNMR, molecular mechanics, and crystal structures of 2,11-dithia[3.3]orthometacyclophane and 2,11-dithia[3.3]orthoparacyclophane (1990) (16)
- Beiträge zur Kenntnis des chromophoren Systems der Corrine, IX. Über eine neuartige Thermolyse‐Reaktion am Dicyano‐cobyrinsäure‐heptamethylester (1981) (16)
- 13C NMR spectroscopy of polycyclic aromatics. VIII—amino derivatives of quinoline, isoquinoline, acenaphthene and fluoranthene (1976) (15)
- Darstellung und Kristallstrukturen einiger mit N,N'‐Dimethylharnstoff verbrückter Diphosphorverbindungen; NMR‐Untersuchung einer λ4P+λ4P+‐Diphosphorverbindung (1990) (15)
- 13C NMR of alkyl-substituted arylthallium trifluoroacetates (1974) (15)
- PHENYLETHANOID GLYCOSIDES FROM BARLERIA CRISTATA L. CALLUS CULTURES (2005) (15)
- Influence of the nature of the solvent on the chemical shift of the [BF4]− anion (2002) (15)
- 13C‐NMR ortho‐disubstituierter Isopropylbenzole: Chemische Verschiebung und Konformation bezüglich der (H3C)2CH — Aryl‐Bindung (1977) (15)
- Das Thermogramm einer C6H6-Chemie im Temperaturbereich von 450 bis 730°C (1994) (15)
- On the Functionalization of [2.2](1,4)Phenanthrenoparacyclophane†‡ (2007) (15)
- Synthesis and 13C NMR spectra of 3′-amido analogs of adenosine 3′,5′-cyclic monophosphate (1975) (15)
- In vitro formation of the anthranoid scaffold by cell-free extracts from yeast-extract-treated Cassia bicapsularis cell cultures. (2013) (15)
- 1H and 13C NMR spectra of multibridged [2n]cyclophanes (1993) (14)
- Interparticle Interaction in Lithium Tetrafluoroborate Solutions (1999) (14)
- Darstellung und Strukturermittlung von Dicyanocobyrinsäure‐methylester‐amiden und Korrelation ihrer 13C‐NMR‐Daten (1980) (14)
- Preparation and NMR spectra of four isomeric diformyl[2.2]paracyclophanes (cyclophanes 66) (2010) (13)
- Eine neue quantitative Beschreibung der Abstandsabhängigkeit von 19F‐19F‐Spin‐Spin‐Kopplungen durch den Raum (1995) (13)
- Unusual P=C bond cleavage by double dichlorosilylene transfer from trichlorosilyltrimethylgermane to P-phosphanyl phosphaalkenes. (2002) (13)
- Zur Reaktion von Aminonucleosiden mit Thiophosphorylierungsreagenzien (1978) (13)
- Herstellung und Struktur einer Diphosphorverbindung mit positiven Ladungen an den beiden aneinander gebundenen P-Atomen† (1985) (13)
- New chiral side chains for ferro- and antiferro-electric liquid crystals derived from the preen-gland wax of the domestic goose (1997) (13)
- Syn‐ und anti‐[2.2]Orthometacyclophan (1989) (12)
- syn‐ and anti‐[2.2]Orthometacyclophane (1989) (12)
- β‐Carboline Alkaloids, V: Total Synthesis of the Antimicrobial Marine Alkaloid Eudistomin T. β‐Carbolin‐Alkaloide, 5. Mitt.: Totalsynthese des marinen Alkaloides Eudistomin T (1994) (12)
- Eu(DPM)3-induced shifts in substituted anilines. The importance of basicity and steric effects (1971) (12)
- Proton Magnetic Resonance Studies of Rotational Isomerism in Halotoluene Derivatives. XI. Experimental and Theoretical Barriers to Rotation in α,α,2,4,6-Pentabromo-, α,α-Dibromo-2,4,6-trichloro-, and α,α-Dibromo-2,6-dichlorotoluene (1974) (12)
- Barrier to Internal Rotation in 2,6-Dichlorobenzal Iodide and some α,α′-m-Xylyl Halides. Experimental Evidence for the Transition State Conformation in Benzal Halides (1974) (11)
- Diastereomers Composed of Two Planar‐Chiral Subunits: Bis([2.2]paracyclophan‐4‐yl)methane and Analogues (1999) (11)
- Enantioselective reduction of acetyldimethylphenylsilane by Trigonopsis variabilis (DSM 70714) (1987) (11)
- [P4Aryl6][Me3SnF2]2 (Aryl = 2,6-(MeO)2C6H3), ein ungewöhnliches Ionenpaar mit einem planaren 2,4-Diphospha-1,3-diphosphoniacyclobutan-Dikation und dem Difluortrimethylstannat-Anion†‡ (1989) (11)
- Mikrobiologische Umwandlung von Silicium-Yerbindungen: Enantioselektive Reduktion von Acetessigsäure-(trimethylsilylalkyl)estern und deren Carba-Analoga/ Microbiological Transformation of Silicon Compounds: Enantioselective Reduction of Trimethylsilylalkyl Acetoacetates and their Carba-Analogues (1983) (11)
- Aminonucleoside, VIII. 3′‐Amino‐3′‐desoxyadenosin,3,5′‐Diamino‐3′,5′‐didesoxyadenosin und N‐substituierte Derivate (1979) (11)
- 13C and 1H NMR chemical shift assignments of 1‐ and 2‐alkylnaphthalenes (R = Me, Et, i‐Pr, t‐Bu) and determination of substituent effects on 13C and 1H chemical shifts (1992) (11)
- Cyclophane, XXIX. Gasphasenpyrolyse von 2,11‐Dithia[3.3](1,2)(1,4)cyclophan‐S,S,S′,S′‐tetraoxid (1989) (11)
- Determination of cross-reactivity of poly- and monoclonal antibodies for synthetic cannabinoids by direct SPR and ELISA. (2017) (11)
- Synthese des (±)‐„Isoalbens”︁ (1979) (10)
- Reactions of some mixed-valence diphosphorus compounds with the platinum(0) complex, (C2H4)Pt(PPh3)2. X-ray crystal structure of the product of the reaction of (C2H4)Pt(PPh3)2 with a λ3Pλ4P+ diphosphorus compound (1989) (10)
- Über die Synthese von 2′,3′‐Didesoxy‐3′‐(phosphonomethyl)nucleosiden, Phosphonat‐Analogen von 2′‐Desoxy‐3′‐nucleotiden (1991) (10)
- Investigation of 19F–19F spin–spin coupling in 1‐(x‐fluorophenyl)‐8‐(y‐fluorophenyl)naphthalenes (x, y = 2, 3, 4) † (2000) (10)
- Zur Reaktion von Isocyaniden mit Nitriliminen[1] (1994) (10)
- Hydrolysis in the system LiPF 6propylene carbonatedimethyl carbonateH 2O (2005) (10)
- 13C‐Kernresonanz‐Spektroskopie an diastereomeren Dicarbonsäuren: 2,3‐Dimethylbernsteinsäure, 2‐Äthyl‐3‐methylbernstein‐säure und 3‐Äthyl‐4‐methyladipinsäure (1974) (10)
- Five- to nine-bond 31P–31P spin coupling constants in derivatives of benzene and naphthalene (1977) (9)
- 2,11-Dithia-[3.3](5,6)indano-orthocyclophane and 2,11-dithia-[3.3](5,6)indanocyclophane: synthesis, DNMR and X-ray structure analysis (1989) (9)
- INDO‐ und CNDO‐MO‐Berechnungen von weitreichenden H, H‐Kopplungen im Vinylcyclopropan (1972) (9)
- Konformationen ortho‐disubstituierter Anilin‐ und Toluol‐Derivate. Magnetische Protonenresonanz und halbempirische Energieberechnung (1970) (9)
- Sila‐Pharmaca. Part 37. Preparation and Properties of the Enantiomers of the Antimuscarinic Agents Sila‐Procyclidine and Sila‐Tricyclamol Iodide: Optically Active Silanols with Silicon as the Centre of Chirality. (1987) (9)
- Korrelation des β‐Effektes von Methylgruppen auf δ(13C) mit der CαCβ‐π‐Bindungsordnung (1976) (9)
- 13C chemical shifts of branched alkylbenzenes. A reinvestigation. (1974) (9)
- Neue Dienophile und Diene, III. Über die Addition von Cyanacetylen an [2.2]Paracyclophan (1990) (9)
- Beiträge zur Kenntnis des chromophoren Systems der Corrine, V. Notiz über die ozonolytische Fragmentierung des Dicyano‐10‐bromcobyrinsäure‐heptamethylesters (1979) (9)
- Configurational assignment by NMR spectroscopy of stereoisomeric 2,6-dimethyl-tricyclo[5.2.1.02,6]dec-3-enes and decanes: Albene and isoalbene (1978) (9)
- Assignment of the 1H n.m.r. spectrum of heptamethyl dicyanocobyrinate in chloroform solution by two-dimensional 13C/1H chemical shift correlation spectroscopy (1984) (9)
- The conformation of 1.3.5-trimethyl-2-isoprophyl-benzene and of similar compounds containing sp2–sp3 bonds (1968) (9)
- A Cyclobutadiene Intermediate in the Intramolecular Cycloaddition of 4,15-Bis(phenylethynyl)[2.2]paracyclophane†‡ (2008) (9)
- Absolute Configuration of the Enantiomers of the Antimuscarinic Agents Procyclidine and Tricyclamol Iodide: X-Ray Structural Analysis of (R)-1-[3-Cyclohexyl-3-hydroxy-3-phenylpropyl]-1-methylpyrrolidinium Iodide (1986) (9)
- The 4-chloro-2-oxo-1,3,5,5,8-pentamethyl-1,3,8-triaza-5-azonia-4λ5-phosphaspiro[3.4]octyl cation: X-ray crystal structure determination and variable temperature 1H NMR spectra (1990) (9)
- Through‐Space J(P,P) and J(P,F) Spin–Spin Coupling in C1‐Symmetric Biaryl Diphosphanes (2011) (9)
- Ungewöhnliche Spaltung von PC‐Bindungen durch doppelten Dichlorsilylen‐Transfer von Trichlorsilyltrimethylgerman auf P‐Phosphanylphosphaalkene (2002) (8)
- Structure and Reactivity of Xanthocorrinoids. Part III. The first example of a pinacol-type rearrangement in the corrin series (1985) (8)
- Dimerisiert Cyanacetylen beim Erhitzen zu 1,3‐Cyclobutadien‐1,2‐dicarbonitril? (1989) (8)
- The Conformational Equilibrium of 1,2,3-Tribromopropane in Solution (1973) (8)
- 18,19‐Didehydrocorrinoids—Possible Intermediates in the Biosynthesis of Vitamin B12 (1981) (8)
- über einige Derivate der 3′,5′‐ und 2′,5′‐Cyclophosphate des Adenosins (1982) (8)
- Conformations of ortho-Disubstituted Aniline and Toluene Derivatives. Proton Magnetic Resonance and Semiempirical Energy Calculation†‡ (1970) (8)
- Does Cyanoacetylene Dimerize Thermally to 1,3-Cyclobutadiene-1,2-dicarbonitrile?†‡ (1989) (8)
- Proton Magnetic Resonance Spectrum of 1-Penten-3-yne. INDO and CNDO/2 Molecular Orbital Calculations on Long-Range Spin–Spin Coupling Constants in Enynes (1972) (8)
- Preparation, structural properties and thermal isomerization of hex-3-ene-1,5-diyne bridged [2.2]paracyclophanes. (2014) (8)
- Recent Advances in NMR Studies of Cyclophanes (2008) (8)
- Correlation between the β‐Effect of Methyl Groups on δ(13C) and the CαCβ π‐Bond Order (1976) (8)
- Ultrahigh precision NMR spectral analysis (1974) (7)
- New Stereoisomers of Quinic Acid and Their Lactones. (1991) (7)
- Zur Struktur rhodiumhaltiger Corrinoide (1980) (7)
- Zur Konstitution gelber metallfreier und cobalthaltiger Corrinoide (1981) (7)
- Zur absoluten Konfiguration der Enantiomere der Antimuskarinika Procyclidin und Tricyclamoliodid: Röntgen-strukturanalyse von (R)-1-[3-Cyclohexyl-3-hydroxy-3-phenyl-propyl]-1-methylpyrrolidiniumiodid (1986) (7)
- Sila-biperiden undendo-Sila-biperiden: Synthesen, Kristallstrukturen und antimuscarinische Eigenschaften (1994) (7)
- 13C-NMR-Spektroskopie an polycyclischen Aromaten, II. Die 13C-NMR-Spektren von 1- und 2-Fluornaphthalin. Überprüfung der Signalzuordnung und Untersuchung der Substituenteneffekte auf die chemischen Verschiebungen / 13C NMR Spectroscopy of Polycyclic Aromatics, II. The 13C NMR Spectra of 1- and 2-Flu (1975) (7)
- Microbial Hydroxylations of Bicyclic and Tricyclic Sesquiterpenes (1989) (7)
- Preparation of highly hindered polyenes with tert-butyl groups in internal positions. (2011) (7)
- NMR‐Spektroskopie. Grundlagen, Konzepte und Anwendungen der Protonen‐ und Kohlenstoff‐1 3‐Kernresonanz‐Spektroskopie in der Chemie. 3., neubearbeitete und erweiterte Auflage. Von H. Günther. Thieme, Stuttgart, 1992. XIII, 520 S., Broschur 98.00 DM. ‐ISBN 3‐1 3‐487503‐9 (1993) (7)
- Proton magnetic resonance spectra of the atropisomers of ortho‐hexaphenylene (1973) (7)
- 13C nuclear magnetic resonance spectra of arylthallium(III) bis(trifluoroacetates) (1974) (7)
- Preparation and NMR Spectroscopy of Selected Polychlorinated meta‐Terphenyls (2007) (6)
- Alkine und Cumulene, XVIII. Zur Acetylen-Oligomerisierung nach Nieuwland: Struktur der Tetrameren (1986) (6)
- The complete 13C, 19F, and 1H spectral analysis of 1,2,3-trifluorobenzene (1977) (6)
- Discrimination by NMR spectroscopy of isomeric ar,ar′-disubstituted [2.2] paracyclophanes carrying identical substituents (1997) (6)
- Phenolcarbonsäuren und ihre Glycerinester in Maisgrits (1992) (6)
- A New Concept for the Efficient Synthesis of Chiral Phosphorus−Nitrogen−Carbon Cage Compounds (2003) (6)
- Spin–Spin Interactions Across the “Cove” in the (Z) and (E) Isomers of 1,1′‐Difluoro‐9,9′‐bifluorenylidene (2005) (6)
- Chemical synthesis of lignin alcohols and model lignins enriched with carbon isotopes (1990) (6)
- 2′,3′ -Dideoxy-3′ -C-(phosphonomethyl)adenosine, the Phosphonate Analogue of 2′-Deoxyadenosine 3′-Phosphate (1983) (6)
- Structure and reactivity of xanthocorrinoids. Part V. Formation of trans‐diol derivatives of 5,6‐dihydrocobyrinic acid from xanthocorrinoids under acidic conditions (1991) (5)
- Reactions of Ru3(CO)12 with Diphosphenes — A New Route to 50-Electron Ru3P2nido-Clusters† (2004) (5)
- 1H, 13C and 19F NMR study of 8‐fluoro‐ and 8,12‐difluoro[2.2]metaparacyclophane and of 9‐fluoro‐ and 9,14‐difluoro‐2,11‐dithia[3.3]metaparacyclophane (1998) (5)
- C→N Migrations of the ethoxycarbonyl group in reactions of ortho-substituted aryl isocyanates with the 1,3-zwitterion derived from triisopropylphosphine and ethyl 2-cyanoacrylate (2003) (5)
- Annulation of Seven-Membered Rings to [2.2]Paracyclophane† (2008) (5)
- A 1H and 13C NMR study of methoxyretinoids. Spectral assignment and determination of configuration (1984) (5)
- Paracyclophanes: Extending the Bridges. Reactions (2009) (5)
- Reversible intramolecular photocycloaddition of a bis(9-anthrylbutadienyl)paracyclophane – an inverse photochromic system. (Photoactive cyclophanes 5) (2009) (5)
- 1,2,5, 6‐Tetrazocines from Nitrile Imines and tert‐Butyl Isocyanide (2000) (5)
- PHENYLETHANOID GLYCOSIDES FROM BARLERIA CRISTATA L. (2005) (5)
- Formation of phostonic acids during the reduction of azidonucleosidephosphonic acids (2001) (5)
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- Preparation and Structure of a Diphosphorus Compound with Positive Charges on the Two Directly Bonded Phosphorus Atoms. (1986) (0)
- KNOWLEDGE OF THE CORRIN CHROMOPHORE SYSTEM. XII. CHEMICAL PROPERTIES OF REACTION PRODUCT OF HEPTAMETHYL DICYANOCOBYRINATE WITH HYPOCHLOROUS ACID (1982) (0)
- Preparation and Single-Crystal X-Ray Structure Investigations of Some N,N′-Dimethylurea-Bridged Diphosphorus Compounds; NMR Studies of a λ4P+λ4P+-Diphosphorus Compound. (1990) (0)
- 2,2,5,5-TETRAORGANYL-1,4-DIOXA-2,5-DISILACYCLOHEXANES (1983) (0)
- Cyclophanes. Part 31. Does Cyanoacetylene (I) Dimerize Thermally to 1,3‐Cyclobutadiene‐1,2‐dicarbonitrile (II)/(III)? (1989) (0)
- FIRST SYNTHESIS OF RAC-HOMOFENCHONE (1,4,4-TRIMETHYLBICYCLO(3.2.1)OCTAN-3-ONE) (1985) (0)
- Reactions of Some Mixed-Valence Diphosphorus Compounds with the Platinum(0) Complex, (C2H4)Pt(PPh3)2. X-Ray Crystal Structure of the Product of the Reaction of (C2H4)Pt(PPh3)2 with a λ3Pλ4P+ Diphosphorus Compound. (1990) (0)
- CARBON‐13 NMR SPECTROSCOPY OF POLYCYCLIC AROMATICS. 10. CARBON‐13 NMR OF ORTHO‐DISUBSTITUTED ISOPROPYLBENZENES‐ CHEMICAL SHIFT AND CONFORMATION RELATIVE TO THE (H3C)2CH ‐ ARYL BOND (1977) (0)
- CARBON‐13 NMR SPECTROSCOPY OF POLYCYCLIC AROMATICS. 9. CORRELATION OF THE β‐EFFECT OF METHYL GROUPS ON Δ‐CARBON‐13 WITH THE Cα‐C.beta±PI.‐BINDING ORDER (1976) (0)
- Book Review: 100 and more Basic NMR Experiments. A Practical Course. By S. Braun, H.‐O. Kalinowski and S. Berger (1996) (0)
- Retinoids. Part 7. Synthesis of Acetylenic Retinoids 9,10-Didehydro-19-norretinal and 9,10,11,12-Tetradehydro-19-norretinal. (1986) (0)
- ASSIGNMENT OF THE PROTON NMR SPECTRUM OF HEPTAMETHYL DICYANOCOBYRINATE IN CHLOROFORM SOLUTION BY TWO-DIMENSIONAL CARBON-13/PROTON CHEMICAL SHIFT CORRELATION SPECTROSCOPY (1985) (0)
- Crystal structure of 6-bromo-2,11-dithia[3.3]metaparacyclophane, C16H15BrS2 (1994) (0)
- C→N Migrations of the Ethoxycarbonyl Group in Reactions of ortho‐Substituted Aryl Isocyanates with the 1,3‐Zwitterion Derived from Triisopropylphosphine and Ethyl 2‐Cyanoacrylate. (2003) (0)
- Cyclophanes. Part 28. Syn- and anti-(2.2)Orthometacyclophane. (1989) (0)
- L. D. Quin and A. J. Williams. Practical Interpretation of P‐31 NMR Spectra and Computer Assisted Structure Verification. Advanced Chemistry Development, Inc., Toronto, 2004, 128 pp, pbk. ISBN 0 9735913 0 7 (2006) (0)
- A Formal (4 + 2) Dimerization of 9-Cyclopropylidene-9H-fluorene. (1997) (0)
- Crystal structure of syn-6,15-di-tert-butyl-9,18-difluoro-2,11-dithia[3.3]-metacyclophane, C24H30F2S2 (1995) (0)
- (13)C-KERNRESONANZ-SPEKTROSKOPIE AN DIASTEREOMEREN DICARBONSAEUREN, 2,3-DIMETHYLBERNSTEINSAEURE, 2-AETHYL-3-METHYLBERNSTEINSAEURE UND 3-AETHYL-4-METHYLADIPINSAEURE (1975) (0)
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What Schools Are Affiliated With Ludger Ernst?
Ludger Ernst is affiliated with the following schools:
