Dick van der Helm: search on Z-Library

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1

Unusual stereoselectivity in the Diels-Alder addition of cyclopentadiene with the bicyclo[2.2.2]octene nucleus

Williams, Richard Vaughan, Todime, Murali Mohan Reddy, Enemark, Paul, van der Helm, Dick, Rizvi, Safia Khalil

Journal:

Journal of Organic Chemistry

Year:

1993

Language:

english

File:

PDF, 529 KB

english, 1993

2

Synthesis and biological activity of some derivatives of thiochroman-4-one and tetrahydrothiapyran-4-one

Ramalingam, K., Thyvelikakath, George X., Berlin, K. Darrell, Chesnut, Robert W., Brown, Rebecca A., Durham, Norman N., Ealick, Steven E., Van der Helm, Dick

Journal:

Journal of Medicinal Chemistry

Year:

1977

Language:

english

File:

PDF, 530 KB

english, 1977

3

ChemInform Abstract: Structure of Antimycin A1, a Specific Electron Transfer Inhibitor of Ubiquinol—Cytochrome c Oxidoreductase.

Hoeon Kim, Lothar Esser, M. Bilayet Hossain, Di Xia, Chang-An Yu, Josep Rizo, Dick van der Helm, Johann Deisenhofer

Journal:

Year:

1999

File:

PDF, 25 KB

1999

4

Synthesis, conformational analysis, and antiarrhythmic properties of 7-benzyl-3-thia-7-azabicyclo[3.3.1]nonan-9-one, 7-benzyl-3-thia-7-azabicyclo[3.3.1]nonane hydroperchlorate, and 7-benzyl-9-phenyl-3-thia-7-azabicyclo[3.3.1]nonan-9-ol hydroperchlorate and derivatives. Single-crystal x-ray diffraction analysis and evidence for chair-chair and chair-boat conformers in the solid state

Bailey, Bruce R., Berlin, K. Darrell, Holt, Elizabeth M., Scherlag, Benjamin J., Lazzara, Ralph, Brachmann, Johannes, Van der Helm, Dick, Powell, Douglas R., Pantaleo, Nantelle S., Ruenitz, Peter C.

Journal:

Journal of Medicinal Chemistry

Year:

1984

Language:

english

File:

PDF, 1.27 MB

english, 1984

5

The Crystal and Molecular Structures of Two 4-Alkenyl-substituted Bicyclohexylnitriles

Ji, Xinhua, Richter, Wolfgang, Fung, Bing M., Helm, Dick Van Der, Schadt, Martin

Journal:

Molecular Crystals and Liquid Crystals

Year:

1991

Language:

english

File:

PDF, 464 KB

english, 1991

6

Structure of Antimycin A1, a Specific Electron Transfer Inhibitor of Ubiquinol−Cytochrome c Oxidoreductase

Kim, Hoeon, Esser, Lothar, Hossain, M. Bilayet, Xia, Di, Yu, Chang-An, Rizo, Josep, van der Helm, Dick, Deisenhofer, Johann

Journal:

Journal of the American Chemical Society

Year:

1999

Language:

english

File:

PDF, 49 KB

english, 1999

7

Siderophore mediated iron(III) uptake in Gliocladium virens. 2. Role of ferric mono- and dihydroxamates as iron transport agents

Mahbubul A.F. Jalal, Steve K. Love, Dick van der Helm

Journal:

Journal of Inorganic Biochemistry

Year:

1987

Language:

english

File:

PDF, 575 KB

english, 1987

8

Crystal structure of retro-isomer of the siderophore ferrioxamine E

M. Bilayet Hossain, Mahbubul A. F. Jalal, Dick van der Helm, Kazuyuki Shimizu, Masayasu Akiyama

Journal:

Journal of Chemical Crystallography

Year:

1998

Language:

english

File:

PDF, 263 KB

english, 1998

9

Crystal and molecular structure of didemnin A, an antiviral depsipeptide

M. BILAYETHOSSAIN, DICK VAN DER HELM, JOCHEN ANTEL, GEORGE M. SHELDRICK, ALFRED J. WEINHEIMER, S.K. SANDUJA

Journal:

Chemical Biology & Drug Design

Year:

1996

Language:

english

File:

PDF, 578 KB

english, 1996

10

Sodium-ethylenediamine reductive dimerization of naphthalene to 5,6,7,12,13,14-hexahydro-5,13:6,12-dimethanodibenzo[a,f]cyclodecene

Eisenbraun, E. J., Ansell, L. L., Dobbs, T. K., Harris, L. E., Hertzler, D. V., Ruehle, P. H., Burks, John E., Van der Helm, Dick.

Journal:

Journal of Organic Chemistry

Year:

1976

Language:

english

File:

PDF, 562 KB

english, 1976

11

The Crystal structure of ferrioxamine E

Van der Helm, Dick, Poling, M.

Journal:

Journal of the American Chemical Society

Year:

1976

Language:

english

File:

PDF, 587 KB

english, 1976

12

Trimethyl[(4r)-tetrahydro-trans-2,6e-diphenyl-cis-3,5e-dimethyl-2H-pyran-4-yl]ammonium iodide and trimethyl[(4r)-tetrahydro-cis-2,6e-diphenyl-cis-3,5e-dimethyl-2H-pyran-4-yl]ammonium iodide. Evidence for a twist-boat form in each isomer in solution and the solid state

Ramalingam, Kondareddiar, Berlin, K. Darrell, Powell, Douglas R., Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1987

Language:

english

File:

PDF, 373 KB

english, 1987

13

[IEEE 2007 IEEE 10th International Conference on Rehabilitation Robotics - Noordwijk, Netherlands (2007.06.13-2007.06.15)] 2007 IEEE 10th International Conference on Rehabilitation Robotics - Grasp force optimization in the design of an underactuated robotic hand

Schuurmans, Jasper, van der Linde, Richard Q, Plettenburg, Dick H, van der Helm, Frans CT

Year:

2007

Language:

english

File:

PDF, 3.48 MB

english, 2007

14

Gymnodinium breve toxins. 1. Isolation and x-ray structure of O,O-dipropyl (E)-2-(1-methyl-2-oxopropylidene)phosphorohydrazidothioate (E)-oxime from the red tide dinoflagellate Gymnodinium breve

Alam, Maktoob, Sanduja, Radhika, Hossain, M. Bilayet, Van der Helm, Dick

Journal:

Journal of the American Chemical Society

Year:

1982

Language:

english

File:

PDF, 423 KB

english, 1982

15

Conformation and crystal structures of two cycloisomeric hexapeptides: cyclo-(L-alanyl-L-alanylglycylglycyl-L-alanylglycyl) monohydrate (I) and cyclo-(L-alanyl-L-alanylglycyl-L-alanylglycylglycyl) dihydrate (II)

Hossain, M. Bilayet, Van der Helm, Dick

Journal:

Journal of the American Chemical Society

Year:

1978

Language:

english

File:

PDF, 831 KB

english, 1978

16

GEOMETRICAL OPTIMIZATIONS, NMR ANALYSES, AND NOVEL CRYSTAL STRUCTURES OF 3-OXA-7-BENZYL-7-AZABICYCLO[3.3.1]-NONAN-9-ONE AND 3-THIA-7-BENZYL-7-AZABICYCLO[3.3.1]-NONAN-9-ONE; STRUCTURAL ANALYSIS OF THE CORRESPONDING 3,7-DIHETERABICYCLO[3.3.l]NONANE HYDROPERCHLORATES

Berlin, K. DARRELL, Tyagi, Sameer, Rahaman, Asif, Qiu, Feng, Raff, Lionel M., Venkatramani, Lalitha, Khan, M. A., Van Der Helm, Dick, Yu, Valentina, Praliev, K. D.

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

1999

Language:

english

File:

PDF, 728 KB

english, 1999

17

Atropodiastereoisomerism and pseudoassymetry with axial chirality of ligands in bis(2-methyl-1-naphthyl)methanols

Červinka, Otakar, Bláha, Karel, Fábryová, Anna, Fink, R., Van der Helm, Dick, Pořádek, Jaroslav

Journal:

Collection of Czechoslovak Chemical Communications

Year:

1979

Language:

english

File:

PDF, 7.38 MB

english, 1979

18

ChemInform Abstract: KRISTALLSTRUKTUR VON CACL2.GLYCYLGLYCYLGLYCIN.3H2O

VAN DER HELM, DICK, WILLOUGHBY, T. V.

Journal:

Chemischer Informationsdienst. Organische Chemie

Year:

1970

File:

PDF, 75 KB

1970

19

10.1038/4931

Deisenhofer, Johann, Buchanan, Susan K., Smith, Barbara S., Venkatramani, Lalitha, Xia, Di, Esser, Lothar, Palnitkar, Maya, Chakraborty, Ranjan, van der Helm, Dick

Journal:

Natural Structural Biology

Year:

1999

Language:

english

File:

PDF, 1.08 MB

english, 1999

20

The biological activity and crystal structure of 2-allylamino-4,5-dihydro-7,8-dimethoxynaphtho[1,2-d]thiazole

A. Rahman, Dick Van Der Helm, Melvin D. Herd, M. M. Hashem, K. Darrell Berlin

Journal:

Journal of Heterocyclic Chemistry

Year:

1980

File:

PDF, 236 KB

1980

21

A variation of the square-pyramidal copper(II) surrounding. A possible copper interaction with tyrosine

Van der Helm, Dick., Franks, W. A.

Journal:

Journal of the American Chemical Society

Year:

1968

Language:

english

File:

PDF, 361 KB

english, 1968

22

Structure and conformation of roseotoxin B

Springer, James P., Cole, Richard J., Dorner, Joe W., Cox, Richard H., Richard, John L., Barnes, Charles L., Van der Helm, Dick

Journal:

Journal of the American Chemical Society

Year:

1984

Language:

english

File:

PDF, 674 KB

english, 1984

23

Correction. Syntheses and a Conformational Study of Certain Selected 3-Oxa-7-azabicyclo[3.3.1]nonan-9-ones. Singl-Crystal X-ray Diffraction Analysis of 6,8-Bis(2-chlorophenyl)-2-oxa-azabicyclo[3.3.1]nonan-9-one

Arjunan, Palanisamy, Berlin, Kenneth Darrell, Barnes, Charles, van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1981

Language:

english

File:

PDF, 135 KB

english, 1981

24

Experimental evidence for the lack of stereoselectivity in the electrophilic quench of .alpha.-sulfonyl carbanions

Williams, Richard Vaughan, Kelley, Geoffrey W., Loebel, Jorg, Van der Helm, Dick, Page, Philip C. Bulman

Journal:

Journal of Organic Chemistry

Year:

1990

Language:

english

File:

PDF, 1.38 MB

english, 1990

25

Copyright Act

Van Der Helm, Dick, Howard, Jeanne G., Berger, P. W., Kearsley, Elliot A., Holladay, Janice, Wolf, Emil

Journal:

Year:

1981

Language:

english

File:

PDF, 644 KB

english, 1981

26

ChemInform Abstract: THE CRYSTAL AND MOLECULAR STRUCTURE OF THE P-IODOBENZOATE OF 23-DEMETHYLGORGOSTEROL

HSU, I-NAN, VAN DER HELM, DICK

Journal:

Chemischer Informationsdienst

Year:

1974

File:

PDF, 90 KB

1974

27

ChemInform Abstract: LADUNGSUEBERTRAGUNGSKOMPLEXE VON PURINEN UND PYRIMIDINEN, 9-CYCLOHEXYL-ADENIN-JOD IN ORGANISCHEN LOESUNGSMITTELN UND IM FESTEN ZUSTAND

VAN DER HELM, DICK, CHRISTIAN, SHERRIL D., LIN, LUNG-NAN

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 105 KB

1973

28

The crystal structure and absolute configuration of the 3-p-iodobenzoate-11-acetate of secogorgosterol

E. L. Enwall, Dick van der Helm

Journal:

Recueil des Travaux Chimiques des Pays-Bas

Year:

1974

Language:

english

File:

PDF, 702 KB

english, 1974

29

Carbon-phosphorus heterocycles. Conformational analysis of substituted 1-phenyl-4-phosphorinanones and derivatives. Single-crystal x-ray diffraction analysis of 1-r,cis-2a,trans-6e-triphenyl-4-phosphorinanone 1-sulfide

Rampal, Jang B., Macdonell, Gary D., Edasery, James P., Berlin, K. Darrell, Rahman, Asadur, Van der Helm, Dick, Pietrusiewicz, K. Michal

Journal:

Journal of Organic Chemistry

Year:

1981

Language:

english

File:

PDF, 1.36 MB

english, 1981

30

Cyclic peptides from the ascidian Lissoclinum patella: conformational analysis of patellamide D by x-ray analysis and molecular modeling

Schmitz, Francis J., Ksebati, Mohamad B., Chang, James S., Wang, J. L., Hossain, M. Bilayet, Van der Helm, Dick, Engel, Michael H., Serban, Andrei, Silfer, Jeff A.

Journal:

Journal of Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 1.48 MB

english, 1989

31

Longithorones, Unique Prenylated Para- and Metacyclophane Type Quinones from the Tunicate Aplidium longithorax

Fu, Xiong, Hossain, M. Bilayet, Schmitz, Francis J., van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1997

Language:

english

File:

PDF, 299 KB

english, 1997

32

Marine natural products: 14-bromoobtus-1-ene-3,11-diol, a new diterpenoid from the sea hare Aplysia dactylomela

Schmitz, Francis J., Hollenbeak, Keith H., Carter, Daniel C., Hossain, M. Bilayet, Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1979

Language:

english

File:

PDF, 398 KB

english, 1979

33

X-ray structure of sesterterpene, 16β-acetoxy-24-methyl-12,24-dioxoscalaran-25-al

M. Bilayet Hossain, Kevin Beatty, Francis J. Schmitz, Dick van der Helm

Journal:

Journal of Chemical Crystallography

Year:

1995

Language:

english

File:

PDF, 249 KB

english, 1995

34

Crystal structure and absolute configuration of the indole alkaloid arborescidine C

Florian D. Schubot, M. Bilayet Hossain, Dick van der Helm, Mary Pais, Cecile Debitus

Journal:

Journal of Chemical Crystallography

Year:

1998

Language:

english

File:

PDF, 288 KB

english, 1998

35

Structure of nepetalic acid in the solid state and in solution by x-ray diffraction and nuclear magnetic resonance analysis

Eisenbraun, Edmund J., Browne, Clinton E., Eliel, Ernest L., Harris, David L., Rahman, Asadur, Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1981

Language:

english

File:

PDF, 549 KB

english, 1981

36

Structure of ferric pseudobactin: a siderophore from a plant growth promoting Pseudomonas

Teintze, Martin, Hossain, M. B., Barnes, C. L., Leong, John, Van der Helm, Dick

Journal:

Year:

1981

Language:

english

File:

PDF, 1.52 MB

english, 1981

37

Organometallic compounds of the lanthanides. 36. Bis(pentamethylcyclopentadienyl) halide and alkyl derivatives of the lanthanides

Schumann, Herbert., Albrecht, Ilse., Loebel, Joerg., Hahn, Ekkehardt., Hossain, M. Bilayet., Van der Helm, Dick.

Journal:

Organometallics

Year:

1986

Language:

english

File:

PDF, 1.15 MB

english, 1986

38

Organometallic compounds of the lanthanides. 22. (Tetramethylethylenediamine)lithium dimethyl derivatives of erbium and lutetium

Schumann, Herbert., Lauke, Harald., Hahn, Ekkehardt., Heeg, Mary Jane., Van der Helm, Dick.

Journal:

Organometallics

Year:

1985

Language:

english

File:

PDF, 546 KB

english, 1985

39

Crystal structure of .beta.-gorgonene-silver nitrate

Hossain, M. Bilayet., Van der Helm, Dick.

Journal:

Journal of the American Chemical Society

Year:

1968

Language:

english

File:

PDF, 556 KB

english, 1968

40

Structures and Characteristics of Novel Siderophores from Plant Deleterious Pseudomonas fluorescens A225 and Pseudomonas putida ATCC 39167 †

Khalil-Rizvi, Safia, Toth, Stephen I., van der Helm, Dick, Vidavsky, Ilan, Gross, Michael L.

Journal:

Year:

1997

Language:

english

File:

PDF, 231 KB

english, 1997

41

Sclerophytin C-F: isolation and structures of four new diterpenes from the soft coral Sclerophytum capitalis

Alam, Maktoob, Sharma, Perveen, Zektzer, Andrew S., Martin, Gary E., Ji, Xinhua, Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 1.21 MB

english, 1989

42

Structure of anguibactin, a unique plasmid-related bacterial siderophore from the fish pathogen Vibrio anguillarum

Jalal, M. A. F., Hossain, M. B., Van der Helm, Dick, Sanders-Loehr, J., Actis, L. A., Crosa, J. H.

Journal:

Journal of the American Chemical Society

Year:

1989

Language:

english

File:

PDF, 631 KB

english, 1989

43

Molecular structure of ferric neurosporin, a minor siderophore-like compound containing N.delta.-hydroxy-D-ornithine

Eng-Wilmot, D. L., Rahman, A., Mendenhall, J. V., Grayson, S. L., Van der Helm, Dick

Journal:

Journal of the American Chemical Society

Year:

1984

Language:

english

File:

PDF, 870 KB

english, 1984

44

Metabolites from the marine sponge Tedania ignis. A new atisanediol and several known diketopiperazines

Schmidtz, Francis J., Vanderah, David J., Hollenbeak, Keith H., Enwall, Carol E. L., Gopichand, Yalamanchili, SenGupta, P. K., Hossain, M. B., Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1983

Language:

english

File:

PDF, 687 KB

english, 1983

45

Structure and Absolute Stereochemistry of Salvimirzacolide, a New Sesterterpene from Salvia mirzayanii

Moghaddam, Firoz Matloubi, Amiri, Raheba, Alam, Maktoob, Hossain, M. Bilayet, van der Helm, Dick

Journal:

Journal of Natural Products

Year:

1998

Language:

english

File:

PDF, 79 KB

english, 1998

46

1,5-Dimethyl-2,4,6,8-semibullvalenetetracarboxylic Dianhydride: A Close Approach to a Neutral Homoaromatic Semibullvalene

Williams, Richard Vaughan, Gadgil, Vijay R., Chauhan, Kamlesh, van der Helm, Dick, Hossain, M. Bilayet, Jackman, Lloyd M., Fernandes, Errol

Journal:

Journal of the American Chemical Society

Year:

1996

Language:

english

File:

PDF, 143 KB

english, 1996

47

Syntheses and a conformational study of certain selected 3-oxa-7-azabicyclo[3.3.1]nonan-9-ones. Single crystal x-ray diffraction analysis of 6,8-bis(2-chlorophenyl)-3-oxa-7-azabicyclo[3.3.1]nonan-9-one

Arjunan, Palanisamy, Berlin, K. Darrell, Barnes, Charles L., Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1981

Language:

english

File:

PDF, 1.21 MB

english, 1981

48

Longithorone A: Unprecedented Dimeric Prenylated Quinone from the Tunicate Aplidium longithorax. [Erratum to document cited in CA122:261392]

Fu, Xiong, Hossain, M. Bilayet, van der Helm, Dick, Schmitz, Francis J.

Journal:

Journal of the American Chemical Society

Year:

1995

Language:

english

File:

PDF, 128 KB

english, 1995

49

Cytotoxic aromatic alkaloids from the ascidian Amphicarpa meridiana and Leptoclinides sp.: meridine and 11-hydroxyascididemin

Schmitz, Francis J., DeGuzman, Forecita S., Hossain, M. Bilayet, Van der Helm, Dick

Journal:

Journal of Organic Chemistry

Year:

1991

Language:

english

File:

PDF, 628 KB

english, 1991

50

Aplidioxins A and B, Two New Dibenzo- p -dioxins from the Ascidian Aplidiopsis ocellata

Wolf, Dietmar, Schmitz, Francis J., Hossain, M. Bilayet, van der Helm, Dick

Journal:

Journal of Natural Products

Year:

1999

Language:

english

File:

PDF, 56 KB

english, 1999

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