H. Duddeck

发表

Isolation and characterization of an antimalarial agent of the neem tree Azadirachta indica.

S. Khalid, H. Duddeck, M. González-Sierra, 1989, Journal of natural products.

Chemical Composition and Antitumor Activities from Givotia madagascariensis.

H. Duddeck, H. Krebs, S. Malik, 2004 .

Enantiodifferentiation by 1H and 13C NMR Spectroscopy (Dirhodium Method) – Selectivity of Oxygen Functionalities

H. Duddeck, S. Antus, Edison Díaz Gómez, 2008 .

13C NMR spectroscopy of coumarin derivatives

H. Duddeck, M. Kaiser, 1982 .

High‐field 1H and 13C NMR spectroscopy of some corticosteroids and related compounds

H. Duddeck, M. Fayez, D. Rosenbaum, 1986 .

Dipolar relaxation times and signal assignment in 13C NMR spectra of 2-substituted adamantanes

H. Duddeck, W. Dietrich, R. Gerhards, 1979 .

Composition of the Essential Oil of Achillea Asplenifolia Vent. from Bulgaria

H. Duddeck, M. Todorova, A. Vitkova, 2005 .

Enantiodifferentiation of polyethers by the dirhodium method. Part 2: Cyclotriveratrylenes and cryptophanes

H. Duddeck, T. Brotin, Edison Díaz Gómez, 2007 .

Spectroscopic properties of 6-hydroximino-5β-cholestane derivatives

H. Duddeck, S. Werner, J. Frelek, 1992 .

The structure of marmesinin by powder and single-crystal diffraction methods

H. Duddeck, P. Serda, J. Grochowski, 2004 .

Moenomycin A: further structural studies and preparation of simple derivatives

H. Duddeck, Dudley H. Williams, T. Schubert, 1983 .

Substituent Effects on 13C Chemical Shifts in Aliphatic Molecular Systems. Dependence on Constitution and Stereochemistry

H. Duddeck, 2007 .

NMR spectra and conformational analysis of substituted 1,3,4,5‐tetrahydro‐2H‐1,5‐benzodiazepin‐2‐one derivatives

H. Duddeck, F. Malik, D. Rosenbaum, 1989 .

Carbon‐13 nuclear magnetic resonance spectra. VIII—18α‐ and 18β‐glycyrrhetic acid derivatives

H. Duddeck, G. Palmisano, B. Danieli, 1978 .

13C nuclear magnetic resonance spectra—VI: Stereochemical dependence of γanti, heterosubstituent effects on 13C chemical shifts of bridgehead substituted molecules1

H. Duddeck, Harald Klein, 1977 .

Carbon‐13 nuclear magnetic resonance spectra. I—Monosubstituted adamantanes and adamantanones

H. Duddeck, 1975 .

Chiral recognition of ethers by NMR spectroscopy.

H. Duddeck, Edison Díaz Gómez, 2009, Chirality.

77Se NMR Spectroscopy and Its Applications in Chemistry

H. Duddeck, 2004 .

Syntheses and CD studies of 5α-cholesteno[3,2-d]-, -[2,3-d]- and -[3,4-d]pyrimidines†

H. Duddeck, K. Khan, W. Voelter, 1995 .

13 C nuclear magnetic resonance spectra. Part 10. Substituent effects on the 13C chemical shifts of adamantanes, diamantanes, and triamantanes

H. Duddeck, M. Mckervey, A. Karim, 1979 .

13 C nuclear magnetic resonance spectra. Part 9. Strain effects on 13C chemical shifts of triamantane

H. Duddeck, M. Mckervey, D. Gagnaire, 1979 .

Regioselective functionalisation of triamantane

H. Duddeck, M. Mckervey, A. Karim, 1978 .

Bioactive Phenolics from Carthamus lanatus L.

H. Duddeck, M. Mitova, R. Taskova, 2003, Zeitschrift fur Naturforschung. C, Journal of biosciences.

Synthesis of 1,4-Diazepine Nucleosides

H. Duddeck, S. Hameed, R. Ahmed, 2002 .

Structural investigation and conformational analysis of helianthosid 2, a saponin from Helianthus annuus L

H. Duddeck, G. Bader, K. Hiller, 1995 .

Complete 1H and 13C NMR assignment of two α‐isosparteine salts by the use of two‐dimensional NMR spectroscopy

H. Duddeck, S. Spassov, J. Skolik, 1989 .

Isolation and structural elucidation of 3,4',5,7-tetraacetyl quercetin from Adina cordifolia (Karam ki Gaach).

H. Duddeck, R. Dembinski, M. S. Rao, 2002, Fitoterapia.

Cis-diastereoselectivity in pictet-spengler reactions of L-tryptophan and electronic circular dichroism studies.

H. Duddeck, S. Alam, T. Kurtán, 2012, Chirality.

13C nuclear magnetic resonance spectra—VII

H. Duddeck, 1978 .

Determination of the relative configuration of the C‐19 to C‐29 fragment of amycin B by 1H and 13C NMR investigations

H. Duddeck, G. Habermehl, G. Tóth, 1999 .

Hydrogenation of 3(2)-isoquinolinones and the stereochemistry of the products

H. Duddeck, G. Tóth, M. Hricovíni, 1988 .

Structural assignment of the isomeric 2‐ and 4‐endo‐ iodobicyclo[3.3.1]non‐6‐ene‐3‐endo‐ carbonitriles by two‐dimensional 1H and 13C NMR spectroscopy

H. Duddeck, M. Kaiser, D. Brosch, 1985 .

Syntheses and CD Studies of Optically Active Substituted 1,3,4,5- Tetrahydro-2H-1,5-benzodiazepin-2-ones.

H. Duddeck, K. Khan, W. Voelter, 1996 .

Oxazepines and thiazepines. Part 153: Synthesis of 2,3-dihydro-1,5-benzothiazepin-4(5H)-one derivatives

H. Duddeck, A. Levai,, A. Lévai,, 1984 .

Syntheses and CD studies of optically active substituted 1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-ones

H. Duddeck, K. Khan, W. Voelter, 1995 .

Oxazepines and thiazepines. XIII—conformational analysis of 2,3-dihydrobenzothiazepine derivatives†

H. Duddeck, G. Tóth, Å. Szöllösy, 1982 .

NMR spectra and conformational analysis of substituted 2,3‐dihydro‐[1,5]benzoxazepin‐4(5H)‐one derivatives

H. Duddeck, M. Hiegemann, J. Ott, 1991 .

Selenium-77 nuclear magnetic resonance spectroscopy

H. Duddeck, 1995 .

Origin of 13C complexation shifts in the adduct formation of 2‐butyl phenyl ethers with a dirhodium tetracarboxylate complex

H. Duddeck, Edison Díaz Gómez, 2008, Magnetic resonance in chemistry : MRC.

Conformational analysis of benzoannulated nine‐membered rings. Part 3. 1,4,5,7‐Tetrahydro‐3H‐2,6‐benzodiselenine and its 4‐spiro derivatives

H. Duddeck, B. Ryś, M. Hiegemann, 1992 .

Antimicrobial activity and cytotoxicity of Carthamus lanatus.

H. Duddeck, M. Mitova, H. Najdenski, 2002, Fitoterapia.

Isolation of triterpene saponins from Gypsophila capillaris.

M. S. Karawya, H. Duddeck, M. Elgamal, 1995, Phytochemistry.

Chemical Composition and Antitumor Activities from Givotia madagascariensis

H. Duddeck, S. Malik, W. Beil, 2004 .

A further contribution to some γ-pyrone constituents of Ammi visnaga

H. Duddeck, G. Tóth, M. Elgamal, 1998 .

A Further Contribution to the γ-Pyrone Constituents of Ammi visnaga Fruits

H. Duddeck, M. Elgamal, N. Shalaby, 1990 .

A mainly 13C nuclear magnetic resonance investigation of some indolo[2,3-a]quinolizinylium salts

H. Duddeck, C. Szántay, G. Tóth, 1988 .

Structure elucidation by modern NMR

H. Duddeck, W. Dietrich, 1989 .

Structure elucidation by modern NMR : a workbook

H. Duddeck, W. Dietrich, 1989 .

Aldose-aminoguanidine condensation products: syntheses and N.M.R. studies

László Szilágyi, H. Duddeck, L. Szilágyi, 1986 .

Study of the conformational equilibria of some 2-(2′-hydroxyphenyl)-4-aryl-3H-1,5-benzodiazepines using1H,13C, and15N NMR spectroscopy

H. Duddeck, J. Sitkowski, L. Stefaníak, 1997 .

Synthesis and spectroscopic investigation of some dimeric coumarin and furanocoumarin models

H. Duddeck, G. Tóth, M. Elgamal, 1997 .

SYNTHESIS AND NMR SPECTROSCOPIC INVESTIGATION OF PHENYLPHOSPHORYL DERIVATIVES

H. Duddeck, R. Lecht, 1987 .

First direct discrimination of chiral phosphorus thionate (P=S) derivatives by multinuclear magnetic resonance spectroscopy in the presence of a chiral dirhodium complex.

H. Duddeck, J. Omelańczuk, S. Rockitt, 2001, Chirality.

An Unexpected Synthesis of Novel Oxygen-Bridged 1,5-Benzothiazepine Derivatives and their Reductive Five-Membered-Ring Opening

H. Duddeck, S. Hameed, R. Ahmad, 2000 .

Study of the Conformational Equilibria of Some 2‐(2′‐Hydroxyphenyl)‐4‐aryl‐3H‐1,5‐benzodiazepines Using 1H, 13C, and 15N NMR Spectroscopy.

H. Duddeck, J. Sitkowski, L. Stefaníak, 1997 .

Synthesis and multinuclear magnetic resonance investigation of some 1,3‐selenazole and 1,3‐selenazoline derivatives

H. Duddeck, J. Jaźwiński, B. Kamieński, 2001 .

Further dihydrochalcones from Crotolaria ramosissima

Rao, H. Duddeck, G. Tóth, 1999 .

Complete and signal assignments of 5α-cardenolides isolated from Calotropis procera R. BR.

H. Duddeck, T. Gáti, G. Tóth, 1999 .

Tetracyclic alkaloids of the sparteine group.1H and13C NMR spectroscopy and conformational analysis

H. Duddeck, J. Skolik, U. Majchrzak-Kuczyńska, 1995 .

SYNTHESIS AND STRUCTURE DETERMINATION OF SOME OXADIAZOLE-2-THIONE AND TRIAZOLE-3-THIONE GALACTOSIDES

Zia-ul-Haq, H. Duddeck, J. Sitkowski, 2001, Nucleosides, nucleotides & nucleic acids.

The dirhodium-method in the determination of absolute configurations of phospholene chalcogenides.

H. Duddeck, K. Pietrusiewicz, Stefan Moeller, 2006, Chirality.

Stereochemistry in cross-coupling reaction of crotyl alcohol derivatives and arylmagnesium bromides on trans-bis-1S, 2S- and trans-bis-1R,2R- (diphenylphosphino) cyclopentanenickel dibromide

H. Duddeck, V. Pavlov, G. Snatzke, 1993 .

Chiral phospholene and phospholane chalcogenides: stereochemistry and chiral recognition by multinuclear NMR spectroscopy of their Rh2[(R)-MTPA]4 adducts.

H. Duddeck, K. Pietrusiewicz, Stefan Moeller, 2003, Chirality.

Rh2[(R)-(+)-MTPA]4 as an NMR auxiliary for the enantiodifferentiation of chiral secondary and tertiary phosphine–borane complexes

H. Duddeck, A. Szmigielska, M. Stankevič, 2006 .

Optimizing dirhodium(II) tetrakiscarboxylates as chiral NMR auxiliaries.

H. Duddeck, A. Ghanem, M. Gardiner, 2011, Organic & biomolecular chemistry.

Syntheses and CD studies of new cholesteno[4,3‐d]‐ and ‐[7,6‐d]pyrimidines

H. Duddeck, K. Khan, W. Voelter, 1995 .

Cholesteno‐Indole, I – Synthese von 1′H‐5α‐Cholest‐2‐eno[3,2‐b]indolen

H. Duddeck, J. Samu, J. Botyánszki, 1993 .

Macrocyclic pyrrolizidine alkaloids of crotalaria rosenii

H. Duddeck, G. Snatzke, B. Abegaz, 1987 .

Synthetic and structural studies of key intermediates toward forskolin and/or erigerol. Relative stereochemistry, conformational preferences and stereoselectivity control

H. Duddeck, M. González-Sierra, M. Colombo, 1993 .

Phenylselenenylmenthane derivatives and their enantiomeric discrimination by 1H and 13C NMR spectroscopy in the presence of a chiral dirhodium complex

H. Duddeck, S. Malik, M. Choudhary, 2002 .

13C NMR and CD of some 3,8″-biflavanoids from Garcinia species and of related flavanones

H. Duddeck, S. Yemul, G. Snatzke, 1978 .

Adamantanes as spherical nanosondes in adducts with a chiral dirhodium complex—discriminating enantiomers and probing spatial proximities

H. Duddeck, G. Tóth, Edison Díaz Gómez, 2011, Magnetic resonance in chemistry : MRC.

Stereoisomeric 2-butylphenylsulfoxides and their binding modes in the adduct formation with an enantiopure dirhodium tetracarboxylate complex

H. Duddeck, Vera J. Meyer, Jens T. Mattiza, 2010 .

Experimental verification of diverging mechanisms in the binding of ether, thioether, and sulfone ligands to a dirhodium tetracarboxylate

H. Duddeck, Vera J. Meyer, Jens T. Mattiza, 2010, Magnetic resonance in chemistry : MRC.

Atropisomeric 3-aryl-2-oxo-4-oxazolidinones and some thione analogues--enantiodifferentiation and ligand competition in applying the dirhodium method.

H. Duddeck, Mustafa YILMAZ, Edison Díaz Gómez, 2008, Chirality.

Chiral Atropisomeric 2-Iodo-4,4′,6,6′-tetramethyl-2′-(diphenylphosphoryl)-1,1′-biphenyl-enantiodifferentiation by Rh2[MTPA]4-Adduct Formation and Conformational Analysis

H. Duddeck, O. Demchuk, G. Tóth, 2006 .

Chirality Recognition of Selenium Compounds by NMR Spectroscopy in the Presence of a Chiral Dirhodium Complex

H. Duddeck, Z. Rozwadowski, S. Malik, 2005 .

Rh2[MTPA]4, a dirhodium complex as NMR auxiliary for chiral recognition.

H. Duddeck, 2005, Chemical record.

Chiral atropisomeric diiodobiphenyls––enantiodifferentiation by the dirhodium method

H. Duddeck, O. Demchuk, G. Tóth, 2004 .

Secondary phosphine oxides: tautomerism and chiral recognition monitored by multinuclear NMR spectroscopy of their Rh2[(R)-MTPA]4 adducts.

H. Duddeck, A. Szmigielska, K. Pietrusiewicz, 2004, Chirality.

Pyridine and aminide derivatives as ligands in 1 : 1 Rh2[tfa]4 adducts: 1H, 13C and 15N NMR study

H. Duddeck, J. Jaźwiński, 2003 .

Phenylselenenylalkanes, their adducts with the dirhodium complex Rh2(MTPA)4 and ligand exchange mechanisms in solution as studied by 1H, 13C and 77Se NMR spectroscopy

H. Duddeck, S. Malik, M. Choudhary, 2003 .

Multinuclear magnetic resonance study of chiral mesoionic oxa‐ and thiatriazole and tetrazole derivatives: adducts with dirhodium complexes and chiral recognition

H. Duddeck, J. Jaźwiński, Z. Rozwadowski, 2003 .

Dirhodium tetraacylate complexes and monovalent ligands. Adduct formation in solution as monitored by NMR spectroscopy

H. Duddeck, Z. Rozwadowski, S. Malik, 2003 .

Substituent effects and stereochemistry in 125Te NMR spectroscopy. Diorganyltellurium dihalides and some tellurides and ditellurides

H. Duddeck, Armin Biallaβ, 1994 .

77Se, 13C and 1H NMR spectra of phenylselenenylcycloalkanes, ‐cycloalkenes and some of their selenoxides and 125Te NMR of a tellurium analogue

H. Duddeck, P. Wagner, A. Biallaß, 1991 .

Five membered ring formation of 2-hydroxyalkyl malonate and acetoacetate derivatives the problem of O-versus C-alkylation

H. Duddeck, P. Welzel, M. Hiegemann, 1990 .

Crystal structure of N,N'-ethylenbis(4-propanoyl-2,4-dihydro-5-methyl- 2-phenyl-3H-pyrazol-3-oneimine), C28H32N6O2

H. Duddeck, K. Gloe, B. Uzoukwu, 2001 .

Isolation and Structure Determination of Compounds from Stachys yemenensis Hedge

H. Duddeck, G. Tóth, A. Simon, 2007 .

77Se NMR Spectroscopy and Its Applications in Chemistry

H. Duddeck, 2004 .

17O NMR Spectra of 1‐adamantylphosphoryl derivatives

H. Duddeck, A. Hanna, 1985 .

Phosphine-Rh2[(R)-MTPA]4 Adducts in Solution: Characterization by NMR Spectroscopy and Chiral Discrimination

H. Duddeck, J. Omelańczuk, K. Dziuba, 2003 .

Chiral Discrimination of Some Annelated Xanthine Derivatives by the Dirhodium Method

H. Duddeck, A. Drabczyńska, K. Kieć‐Kononowicz, 2000 .

Chiral discrimination of methyl phenyl sulfoxide using dirhodium complexes

H. Duddeck, C. Meyer, 2000 .

Chiral recognition of nitriles by 1H NMR spectroscopy in the presence of a chiral dirhodium complex

H. Duddeck, S. Hameed, R. Ahmad, 1998 .

Chiral recognition of selenides and iodides by1H NMR spectroscopy in the presence of a chiral dirhodium complex

Shahid Hameed, H. Duddeck, S. Hameed, 1998 .

REVELATION OF PENTACYCLO (6.2.1.02,7.04,10.05,9) UNDECANE \ightleftharpoons OXA-BIRD CAGE EQUILIBRIUM BY 13CMR SPECTROSCOPY: FRAGMENTATION OF CAGED POLYCYCLIC SYSTEMS WITH LEAD TETRAACETATE

H. Duddeck, G. Mehta, Vishwakarma Singh, 1980 .

Carbon‐13 nuclear magnetic resonance spectra: V—substituent interactions at 4‐substituted adamantanones and bicyclo[2.2.2]octanones

H. Duddeck, P. Wolff, 1977 .

Heterocyclization with iminium chlorides. V: Condensation of 1,3-dichlorotrimethinecyanines with 1,3- and 1,2-dinucleophiles

H. Duddeck, G. Tóth, I. Bitter, 1991 .

Synthesis and conformational analysis of some spiropyrazoline isomers

H. Duddeck, G. Tóth, Á. Szöllősy, 1993 .

Competition of Ester, Amide, Ether, Carbonate, Alcohol and Epoxide Ligands in the Dirhodium Experiment (Chiral Discrimination by NMR Spectroscopy) [1]

H. Duddeck, Vera J. Meyer, Guelsuem Oezueduru, 2012, Natural product communications.

Enantiodifferentiation of a silane and the analogous hydrocarbon by the dirhodium method—silane⋯dirhodium complex interaction

H. Duddeck, J. Chojnowski, Edison Díaz Gómez, 2006 .

Enantiodifferentiation of Aliphatic Ethers by the Dirhodium Method

H. Duddeck, A. Meijere, Edison Díaz Gómez, 2006 .

N-(Chloroacetyl)- and N-(dichloroacetyl)-N-(xylyl)alanine esters: assignment of the absolute configurations and enantiodifferentiation by the dirhodium method

H. Duddeck, C. Védova, G. Tóth, 2005 .

Total synthesis of rac-9,11-dehydrodigitoxigenin 3-tetrahydropyranyl ether

H. Duddeck, M. Masnyk, J. Wicha, 1988 .

Sulfur, Selenium, and Tellurium NMR

H. Duddeck, 2007 .

EXTRACTION OF URANIUM(VI) AND VANADIUM(V) WITH 4-ADIPOYL AND 4-SEBACOYL DERIVATIVES OF BIS(1-PHENYL-3-METHYL-PYRAZOLONE-5) AND EFFECT OF DECANOL ON THE DISTRIBUTION BEHAVIOUR OF THESE METAL IONS

H. Duddeck, K. Gloe, B. A. Uzoukwu, 1998 .

Metal(II) Complexes of 4-Acylbis(Pyrazolone-5): Synthesis and Spectroscopic Studies

H. Duddeck, K. Gloe, B. A. Uzoukwu, 1998 .

Synthesis and spectroscopic characterization of dimeric steroidal oximes

H. Duddeck, J. Frelek, W. Szczepek, 1992 .

Secondary metabolites of an Algerian Phlomis bovei and their antioxidant activities

H. Duddeck, H. Laouer, S. Akkal, 2010, Chemistry of Natural Compounds.

Optishift PMR spectroscopic studies on some quinoxaline amino esters and dipeptides

H. Duddeck, M. El-abadelah, S. Sabri, 1977 .

Der Mechanismus von Substitutionsreaktionen an [LRe(NO)(CO)(CH3) ]⊕ in saurer Lösung und die Struktur von [{LRe(NO)(CO)}2(μ‐CH2OCH2)]I2 (L = 1, 4, 7‐Triazacyclononan)

H. Duddeck, K. Wieghardt, B. Nuber, 1987 .

13C-NMR Spectroscopy of Coumarins and Their Derivatives: A Comprehensive Review

H. Duddeck, B. Mikhova, 1996 .

77Se, 13C and 1H NMR spectra of acyclic phenylselenenylalkanes and ‐alkenes and some of their selenoxides

H. Duddeck, B. Ryś, P. Wagner, 1993 .

Conformational studies of benzophosphabicyclooctenes

H. Duddeck, G. Keglevich, G. Tóth, 1992 .

2H and 13C NMR spectra of deuterated adamantan‐2‐ols

Md. Rabiul Islam, H. Duddeck, 1983 .

Steric repulsion and intramolecular interaction of substituents in 4-substituted adamantan-2,6-diones

H. Duddeck, 1983 .

13C nuclear magnetic resonance spectra. XV—the γ‐anti substituent effect and its dependence on substitution at the α‐ and γ‐carbon atom

Md. Rabiul Islam, H. Duddeck, 1981 .

Carbon-13 nuclear magnetic resonance spectra. XVI—lanthanide induced signal shifts of diastereotopic 13C nuclei as a probe for a conformational equilibrium†

H. Duddeck, V. Wiskamp, 1981 .

13C nuclear magnetic resonance—XIV

Md. Rabiul Islam, H. Duddeck, 1981 .

Carbon-13 nuclear magnetic resonance spectra—XII: Through-bond and through-space interactions of substituents in β-substituted ketones and related compounds

H. Duddeck, H. Feuerhelm, 1980 .

Carbon-13 nuclear magnetic resonance spectra: III—2-heteroadamantanes†

H. Duddeck, P. Wolff, 1976 .

Lanthanide induced shifts on the carbon-13 chemical shifts of 2-adamantanol and 2-adamantanethiol

H. Duddeck, W. Dietrich, 1975 .

Synthesis and Conformational Analysis of Some Spiropyrazoline Isomers.

H. Duddeck, G. Tóth, A. Levai,, 1993 .

Synthesis, tautomerism and stereochemistry of spiropyrazolines

H. Duddeck, G. Tóth, A. Levai,, 1992 .

Dynamic 77se nmr of phenylselenyl cyclohexane derivatives

H. Duddeck, P. Wagner, S. Gegner, 1985 .

13C nmr and conformational analysis of some 1,4-dithiepane spiranes

H. Duddeck, B. Ryś, 1985 .

Heterocyclization with Iminium Chlorides. Part 5. Condensation of 1,3- Dichlorotrimethinecyanines with 1,3- and 1,2-Dinucleophiles.

H. Duddeck, I. Bitter, A. Kovács, 1992 .

4-Acylpyrazoloneiminjz Schiff Bases and Their Metal Complexes: Synthesis and Spectroscopic Studies

H. Duddeck, K. Gloe, B. Uzoukwu, 1998 .

Two cardenolides from Calotropis procera

H. Duddeck, J. Kovács, G. Tóth, 1999 .

Sesquiterpene lactones from a further population of Artemisia herba alba

H. Duddeck, A. Danin, M. Kaiser, 1984 .

Chemotypes in Achillea collina based on sesquiterpene lactone profile.

H. Duddeck, A. Trendafilova, M. Todorova, 2007, Phytochemistry.

17O NMR data of phenoxyethyl derivatives

H. Duddeck, G. Romanelli, J. Jios, 2003 .

Structure of a calotropagenin‐derived artifact from Calotropis procera

H. Duddeck, S. Malik, G. Tóth, 2002 .

Complete 1H and 13C signal assignments of 5β‐cardenolides isolated from Acokanthera spectabilis Hook F.

H. Duddeck, J. Kovács, G. Tóth, 1998 .

Structure of a further triterpene saponin from Arenaria filicaulis Boiss.

H. Duddeck, G. Horváth, G. Tóth, 1998 .

Structures of Two Novel Triterpene Saponins from Arenaira filicaulis Boiss.

H. Duddeck, G. Tóth, M. Elgamal, 1997 .

Bianthrones from Senna longiracemosa

H. Duddeck, G. Snatzke, B. Abegaz, 1993 .

Secondary metabolites of Ranunculus bulbosus

H. Duddeck, S. Akkal, A. Achouri, 2012, Chemistry of Natural Compounds.

14β‐HYDROXY STEROIDS. II. PRINS REACTION OF LUMIHECOGENIN ACETATE

H. Duddeck, P. Welzel, B. Janssen, 1981 .

Iridoid and lignan glycosides from Citharexylum spinosum L.

H. Duddeck, G. Tóth, B. Balázs, 2006, Natural product research.

Identification and structure determination of four triterpene saponins from some Middle‐East plants

H. Duddeck, G. Tóth, A. Simon, 2001 .

Coumarins and coumarin glucosides from the fruits of Ammi majus

H. Duddeck, M. Elgamal, N. Shalaby, 1993 .

Crispane and crispanone, two compounds from Petroselinum crispum with a new carbon @skeleton

H. Duddeck, F. Drawert, S. Nitz, 1992 .

The sesquiterpene lactones from two populations of Artemisia herba alba

H. Duddeck, A. Danin, I. Feuerstein, 1983 .

Sesquiterpene lactones from Achillea collina J. Becker ex Reichenb.

H. Duddeck, A. Trendafilova, M. Todorova, 2006, Phytochemistry.

Sesquiterpene lactones from Achillea asplenifolia

H. Duddeck, A. Trendafilova, M. Todorova, 2006 .

The sesquiterpene lactones from achillea fragrantissima, I. Achillolide A and B, two novel germacranolides

H. Duddeck, M. Kajtár, R. Segal, 1987 .

Isolation of lanosta-9(11),24-dien-3β-yl acetate from Leuzea carthamoides

H. Duddeck, S. Khalid, E. Varga, 1989 .

Neo-clerodane diterpenoids from Ajuga chamaepitys

H. Duddeck, S. Spassov, B. Mikhova, 1990 .

Inhibitory effect of lactone fractions and individual components from three species of the Achillea millefolium complex of Bulgarian origin on the human neutrophils respiratory burst activity

H. Duddeck, Atta-ur-rahman, M. Choudhary, 2007, Natural product research.

Prunetin 5-O-β-d-glucopyranoside, an isoflavone from the peduncle of Prunus avium and P. Cerasus

H. Duddeck, S. Khalid, K. Szendrei, 1989 .

Terpenoids from Achillea distans Waldst. & Kit. ex Willed

H. Duddeck, A. Trendafilova, M. Todorova, 2007 .

Anthraquinones from Senna multiglandulosa

H. Duddeck, B. Abegaz, G. Alemayehu, 1994 .

13 C NMR Chemical shifts and carbon-proton coupling constants of some furocoumarins and furochromones

H. Duddeck, M. Elgamal, N. H. Elewa, 1979 .

Isolation of Two Adjuncts from the Fruits of Ammi Majus L

H. Duddeck, M. Elgamal, N. Shalaby, 1993 .

Bianthraquinones and a spermidine alkaloid from Cassia floribunda

H. Duddeck, G. Snatzke, B. Abegaz, 1988 .

Flavonoids from Algerian Endemic Centaurea microcarpa and their Chemotaxonomical Significance

H. Duddeck, H. Laouer, S. Akkal, 2011, Natural product communications.

A new route to cyclic urea derivatives of sugars via phosphinimines

H. Duddeck, J. Kovács, G. Tóth, 1987 .

A New Route to Cyclic Urea Derivatives of Sugars via Phosphine Imides.

H. Duddeck, J. Kovács, G. Tóth, 1988 .

Complete 1H and 13C NMR spectral assignment of N‐aralkylsulfonamides, N‐sulfonyl‐1,2,3,4‐tetrahydroisoquinolines and N‐sulfonyl‐2,3,4,5‐tetrahydro‐1H‐2‐benzazepines. Conformational analysis of N‐[((3′,4′‐dichlorophenyl)methyl)sulfonyl]‐3‐methyl‐2,3,4,5‐tetrahydro‐1H‐2‐benzazepin

H. Duddeck, M. Wiebcke, G. Romanelli, 2005, Magnetic resonance in chemistry : MRC.

Sequence of δ-carbon signals in 2-substituted adamantanes determined by two-dimensional correlated NMR spectroscopy

H. Duddeck, M. Kaiser, D. Rosenbaum, 1986 .

Isomeric diadamantylphosphinic acid chlorides

H. Duddeck, M. Elgamal, M. Kaiser, 1985 .

REARRANGEMENTS OF OXAHOMOADAMANTANE DERIVATIVES IN ACIDIC MEDIA

H. Duddeck, D. Rosenbaum, V. Wiskamp, 1982 .

Rearrangements of oxahomoadamantane derivatives in acidic media. 2

H. Duddeck, D. Brosch, 1981 .

A new method proposed for the determination of absolute configurations of α‐amino acids

H. Duddeck, Edison Díaz Gómez, 2009, Magnetic resonance in chemistry : MRC.

Duddeck, Helmut: Molecular Structures in Three Dimensions

H. Duddeck, 2010 .

Absolute configuration of C2-symmetric spiroselenurane: 3,3,3',3'-tetramethyl-1,1'-spirobi[3 H,2,1]benzoxaselenole.

Ana G. Petrovic, H. Duddeck, O. Mcconnell, 2005, Chemistry.

Effective enantiodifferentiation of spirochalcogenuranes by the dirhodium method: towards the determination of absolute configurations?

H. Duddeck, P. Polavarapu, J. Drabowicz, 2005, Chirality.

Chiral recognition of olefins by 1H NMR spectroscopy in the presence of a chiral dirhodium complex

H. Duddeck, Klaudia Wypchlo, 1994 .

Moenomycin a: Minimum structural requirements for biological activity

Frithjof Kruggel, Peter Welzel, G. Seibert, 1987 .

Comparing various chiral dirhodium tetracarboxylates in the dirhodium method.

H. Duddeck, N. Harada, Zahid Hassan, 2009, Chirality.

DFT–GIAO–NBO and 13C NMR study of the δ‐syn‐axial effect in 2,4‐disubstituted adamantanes

H. Duddeck, E. Kleinpeter, B. Stamboliyska, 2008, Magnetic resonance in chemistry : MRC.

CHALCOGEN ATOM COMPETITION IN THE COORDINATION OF BICYCLIC β-LACTAM DERIVATIVES TO A DIRHODIUM TETRACARBOXYLATE COMPLEX

H. Duddeck, J. Jaźwiński, Edison Díaz Gómez, 2007 .

Modes of Xanthine Complexation to Dirhodium Tetrakis[(R)-α-methoxy-α- (trifluoromethyl)-phenylacetate] in Solution and in the Solid State

H. Duddeck, A. Drabczyńska, K. Kieć‐Kononowicz, 2001 .

17O NMR spectroscopy of 1‐(2‐hydroxyphenyl)‐3‐ naphthylpropane‐1,3‐diones. Influences of keto–enol tautomerism and substituents †

H. Duddeck, J. Jios, 2000 .

UNUSUAL FORMATION OF 2-ARYL-7,7-DIMETHYL-6,8-EPIDISELENO-5,6,7,8-TETRAHYDRO-5-QUINAZOLONES

H. Duddeck, M. Petrova, N. Tonkikh, 1999 .

77Se shielding tensors of diphenyl diselenide, comparison of the results from CP/MAS NMR spectroscopy and IGLO calculations

H. Duddeck, U. Fleischer, G. Balzer, 1997 .

77Se and 13C NMR spectroscopy of some 1,2,3‐selenadiazoles

H. Duddeck, T. Hotopp, 1995 .

13C and 17O NMR spectra of ketenes: A new and unusual type of heavy‐atom effect

H. Duddeck, H. Praas, 1993 .

Natural abundance 17O NMR spectra of some sulphinylimines and isocyanates

H. Duddeck, H. Praas, C. Védova, 1992 .

Natural abundance 17O NMR spectra of thio analogues of chromanones, chromones, flavanones and flavones

H. Duddeck, A. Levai,, 1992 .

Reactions of substituted 2-tert-butyladamantan-2-ols

H. Duddeck, D. Rosenbaum, 1991 .

77Se and 15N NMR investigation of some cycloalkeno‐1,2,3‐selenadiazole derivatives

H. Duddeck, P. Wagner, Dieter G. Müller, 1990 .

Natural abundance 17O NMR spectra of chromanones, chromones, flavanones and flavones

H. Duddeck, M. Elgamal, T. Timár,, 1989 .

Transannular interactions in difunctional medium rings. Part 3. 13C and 17O nuclear magnetic resonance studies on cyclic amino ketones

H. Duddeck, P. Rademacher, G. Spanka, 1988 .

Natural abundance 17O NMR spectra of coumarins, furocoumarins and related compounds

H. Duddeck, M. Elgamal, D. Rosenbaum, 1987 .

1H, 13C, 17O and 33S NMR investigation of some cyclohexyl phenyl sulphides, sulphoxides and sulphones

H. Duddeck, J. Drabowicz, D. Rosenbaum, 1986 .

13C and 31P NMR spectra of 1‐adamantylphosphoryl derivatives

H. Duddeck, A. Hanna, 1985 .

Carbon‐13 NMR spectra of some pentacyclic triterpenoids with the olean‐12‐ene and 18α‐olean‐12‐ene skeleton

H. Duddeck, G. Palmisano, B. Danieli, 1978 .

Complexation of selenium to (R)‐Rh2(MTPA)4: thermodynamics and stoichiometry

H. Duddeck, S. Malik, M. Choudhary, 2002 .

Chiral recognition of epoxides by 1H NMR spectroscopy in the presence of a chiral dirhodium complex

H. Duddeck, Klaudia Wypchlo, 1997 .

The intramolecular Buchner reaction of aryl diazoketones. Synthesis and X-ray crystal structures of some polyfunctional hydroazulene lactones

H. Duddeck, A. Maguire, G. Ferguson, 1990 .

Electronegativity and linear electric field effect on γ‐anti13C chemical shifts

Md. Rabiul Islam, H. Duddeck, 1983 .

Long-acting contraceptive agents: Aliphatic and alicyclic carboxylic esters of levonorgestrel

H. Duddeck, A. Shafiee, T. Watson, 1983, Steroids.

Oxygenated Bisabolane Fucosides from Carthamus lanatus L.

H. Duddeck, M. Mitova, K. Alipieva, 2004, Zeitschrift fur Naturforschung. C, Journal of biosciences.

Glycosides from Bougainvillea glabra

H. Duddeck, G. Tóth, A. Simon, 2006, Natural product research.

Synthesis and spectroscopic characterization of some chromanochalcones and their dihydro derivatives

H. Duddeck, M. S. Rao, R. Narukulla, 2004 .

Biomimetic Transformation of Hodgkinsine, a Pyrrolidinoindoline Alkaloid

H. Duddeck, M. Kaiser, N. Kunesch, 1988 .

Carbon-13 NMR studies on some quinoxaline amino esters and their N-oxides

H. Duddeck, S. Sabri, H. Tashtoush, 1986 .

Saturated amine oxides: Part 8 † . Hydroacridines: Part 27 ‡ . Effects of N‐oxidation and of N‐quaternization on the 15N NMR chemical shifts of N‐methylpiperidine‐derived mono‐, bi‐, and tricycloaliphatic tertiary amines

H. Duddeck, A. Nicolescu, C. Deleanu, 2007, Magnetic resonance in chemistry : MRC.

Flavone glycosides from Polygala telephioides and Polygala arvensis

H. Duddeck, G. Tóth, P. S. Rao, 1999 .

Conformational Study of Some Amino Acid Conjugates of Indol-3-yl-acetic Acid (IAA) by 1H-NOE-Difference Spectroscopy. Structure/Auxin Activity Relationships

H. Duddeck, B. Kojić-Prodić, B. Nigović, 1989 .

Synthesis and conformational analysis of plant hormone (auxin) related compound 2-(indol-3-yl) ethyl β-d-galactopyranoside and its 2,3,4,6-tetra-O-acetyl derivative

H. Duddeck, S. Tomić, B. Kojić-Prodić, 1995 .

Synthesis and conformational analysis of 2-(indol-3-yl)ethyl α-l-arabinopyranoside and its 2,3,4-tri-O-acetyl derivative

H. Duddeck, S. Tomić, J. Kroon, 1994 .

Iridoid glycosides from Linaria species

H. Duddeck, S. Popov, S. Spassov, 1993 .

A Further Contribution to the gamma-Pyrone Constituents of Ammi visnaga Fruits.

H. Duddeck, M. Elgamal, N. Shalaby, 1990, Planta Medica.

Synthesis of the tetrasaccharide repeating-unit of the lipopolysaccharide isolated from Pseudomonas maltophilia.

H. Duddeck, L. Szábo, P. Nánási, 1986, Carbohydrate research.

Structure of a Novel Triterpene Saponin from Gypsophila capillaris (Forssk.)

H. Duddeck, G. Tóth, J. Halász, 1996 .

Two triterpene saponins from Arenaria filicaulis.

H. Duddeck, G. Tóth, M. Elgamal, 1998, Phytochemistry.

Phytochemical investigation of Corchorus olitorius and Corchorus capsularis (Family Tiliaceae) that grow in Egypt

H. Duddeck, G. Tóth, A. Hanna, 2019, Egyptian Pharmaceutical Journal.

Constitution, stereochemistry and conformational behaviour of the photoreaction product of 7‐deacetoxy‐7‐oxokhivorin

H. Duddeck, G. Habermehl, J. Okogun, 1998 .

Flavonoids in flower heads of three Achillea species belonging to Achillea millefolium group

H. Duddeck, A. Trendafilova, M. Todorova, 2007, Chemistry of Natural Compounds.

Separation of U(VI) from V(V) and Extraction-Spectrophotometric Analysis of V(V) with 4-Acylbis(1-phenyl-3-methylpyrazolones-5)

H. Duddeck, K. Gloe, B. Uzoukwu, 1998 .

In vitro Anti-inflammatory Effect of Carthamus lanatus L.

H. Duddeck, Atta-ur-rahman, M. Choudhary, 2003, Zeitschrift fur Naturforschung. C, Journal of biosciences.

Syntheses and CD Studies of New Optically Active Substituted 1,5‐Benzodiazepine Derivatives

H. Duddeck, K. Khan, W. Voelter, 2006 .

Synthesis of galanthamine: intramolecular para-ortho-coupling of diaryl ethers by anodic oxidation

H. Duddeck, H. Schäfer, G. Snatzke, 1984 .

Synthesis and mass spectra of adamantylphosphoryl derivatives

H. Duddeck, A. Hanna, M. Hani, 1986 .

(+)-Catechin-5-galloyl Ester as a Novel Natural Polyphenol from the Bark of Acacia nilotica of Sudanese Origin1.

H. Duddeck, P. Khristova, S. Khalid, 1989, Planta medica.

Synthesis of the tetrasaccharide core region of antigenic lipo-oligosaccharides characteristic of Mycobacterium kansasii.

H. Duddeck, A. Lipták, J. Kerékgyártó, 1988, Carbohydrate research.

Synthesis and spectroscopic properties of stereoisomeric 5,7‐oxido‐6‐hydroxyiminocholestane derivatives

H. Duddeck, D. Horvatic, B. Kojić-Prodić, 1990 .

Novel double functional protection of cephalostatin analogues using a gas-free chlorination method

H. Duddeck, A. Kirschning, G. Dräger, 2019, Heliyon.

Synthesis and conformational analysis of the plant hormone (auxin) related 2-(indol-3-yl)ethyl and 2-phenylethyl β-d-xylopyranosides and their 2,3,4-tri-O-acetyl derivatives

H. Duddeck, S. Tomić, J. Kroon, 1995 .

13C NMR spectroscopy of tri‐ and tetracyclic quinolizidine alkaloids. Compilation and discussion

H. Duddeck, B. Mikhova, 1998 .

Cardiotonic Steroids. Part 7. Synthesis of 17β‐Pyridylandrostane Derivatives.

H. Duddeck, M. Masnyk, J. Wicha, 1984 .

Aryl Naphthoates: A Conformational Analysis Supported by Single-Crystal X-Ray Diffraction

H. Duddeck, J. Jios, G. Echeverría, 2016 .

Chiral Aryl Sulfonyl Hydantoins as Hypoglycemic Agents

H. Duddeck, E. Verspohl, R. Jabeen, 2000 .

First direct discrimination of chiral phosphine selenide (P=Se) derivatives by multinuclear magnetic resonance spectroscopy in the presence of a chiral dirhodium complex.

H. Duddeck, S. Malik, M. Choudhary, 2002, Chirality.

Ring opening reactions of 6-deoxy-9-deoxo-9a-aza-9a-homoerythromycin A 6,9-cyclic imino ether.

H. Duddeck, G. Lazarevski, G. Kobrehel, 1996, The Journal of antibiotics.

Digiferruginol glycoside from the roots of Rubia schumanniana

H. Duddeck, Liu Yong-long, M. Hiegemann, 1991 .

New developments in A1 and A2 adenosine receptor antagonists

H. Duddeck, A. Drabczyńska, C. Müller, 2001 .

Differentiation of diastereomeric bornane derivatives by 13C NMR spectroscopy

H. Duddeck, B. Blagoev, N. Berova, 1983 .

Benzaldehyde derivatives from Sarcodontia crocea.

H. Duddeck, T. Kokubun, Z. Rozwadowski, 2007, Journal of natural products.