Volume 46; Issue 16

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Tetrahedron
Volume 46; Issue 16

Tetrahedron

Volume 46; Issue 16

1

Studies on the regioselectivity of intermolecular diels-alder cycloadditions of 1-methylpyrano[3,4-b]indol-3-one and the N-acetylated derivative

Helena Nandin de Carvalho, Gary I. Dmitrienko, Kent E. Nielson

Journal:

Year:

1990

Language:

english

File:

PDF, 737 KB

english, 1990

2

Additivity in cd amplitudes of p-phenylbenzyl ethers and p-phenylbenzoates of 2-aminosugars

Reiji Takeda, Shi Yong Ryu, Jeong Hill Park, Koji Nakanishi

Journal:

Year:

1990

Language:

english

File:

PDF, 635 KB

english, 1990

3

Monohydrolysis of an aliphatic dinitrile compound by nitrilase from rhodococcus rhodochrous k22

Michihiko Kobayashi, Noriyuki Yanaka, Toru Nagasawa, Hideaki Yamada

Journal:

Year:

1990

Language:

english

File:

PDF, 259 KB

english, 1990

4

Dimerization of (e)-2-benzenesulfonyl-1,3-alkadienes the benzenesulfonyl group exerts acyclic stereocontrol

H.Martin R. Hoffmann, Andreas Weichert, Alexandra M.Z. Slawin, D.J. Williams

Journal:

Year:

1990

Language:

english

File:

PDF, 614 KB

english, 1990

5

Secondary metabolites by chemical screening-5. cycloaddition reactions of elaiophylin

Peter Hammann, Gerhard Kretzschmar

Journal:

Year:

1990

Language:

english

File:

PDF, 319 KB

english, 1990

6

Formation of 4, 5-dihydroxy-2-α-D-glucopyranosyloxy-5-methyl-2-cyclopenten-1-one in the maillard reaction of maltose

Sabine Estendorfer, Franz Ledl, Theodor Severin

Journal:

Year:

1990

Language:

english

File:

PDF, 262 KB

english, 1990

7

Anomeric and steric effects of bromine, chlorine and methoxy-group in conformational analysis and anomerization of hindered tetrahydrofurans

Estera Touboul, Gilbert Dana, Odile Convert

Journal:

Year:

1990

Language:

english

File:

PDF, 881 KB

english, 1990

8

Selective mono- or dimetalation of arenes by means of superbasic reagents

Manfred Schlosser, Hoon Choi Jung, Sadahito Takagishi

Journal:

Year:

1990

Language:

english

File:

PDF, 1.55 MB

english, 1990

9

Conformational analysis of 1-Y, 2-Z-Cyclohexanes ( Y = OH, OMe, F, Cl, Br and I; Z= SMe, SOMe and SO2Me): Study of the Z/Y gauche interactions

M.C. Carreño, J.C. Carretero, J.L. Garcia Ruano, J.H. Rodriguez

Journal:

Year:

1990

Language:

english

File:

PDF, 1.53 MB

english, 1990

10

Stereoconvergent synthesis of a potent mosquito larvicide : (2E,4E,8E,10Z)-N-(2-methyl propyl)-2,4,8,10-dodecatetraeneamide

G.V.M. Sharma, T. Shekharam, V. Upender

Journal:

Year:

1990

Language:

english

File:

PDF, 622 KB

english, 1990

11

Behaviour of the gem-cyano-ethoxycarbonyl cyclohexane, thiopyran and pyran derivatives with sodium borohydride and lithium aluminium hydride

F. Santoyo González, J. Isac García, P. García Mendoza, R. Robles Díaz, J.J. Giménez Martínez, J. Molina Molina, D. Portal Olea, F.J. López Aparicio

Journal:

Year:

1990

Language:

english

File:

PDF, 924 KB

english, 1990

12

Conjugated azoalkenes. Part IX. New 1-amino-4-triphenylphosphoranylidene-5-oxo-2-pyrrolines or αβ-unsaturated hydrazones by reaction of azoalkenes with carboalkoxymethylene triphenylphosphorane

Orazio A. Attanasi, Paolino Filippone, Amedeo Mei, Alessandro Bongini, Elisabetta Foresti

Journal:

Year:

1990

Language:

english

File:

PDF, 854 KB

english, 1990

13

Optically active dihydropyrans and 3-methylenetetrahydrofurans from cyclopropenylethanol derivatives

Juma'a R.Al-Dulayymi, Mark S. Baird

Journal:

Year:

1990

Language:

english

File:

PDF, 1.27 MB

english, 1990

14

Generation of specifically substituted pyridines and pyridones from 2(1h) pyrazinones and acetylenes : A FMO description

M. Tutonda, D. Vanderzande, M. Hendrickx, G. Hoornaert

Journal:

Year:

1990

Language:

english

File:

PDF, 1.46 MB

english, 1990

15

Oligomeric flavanoids. Part W. base-catalyzed pyran rearrangements of procyanidin B-2, and evidence for the oxidative transformation of B- to A-type procyanidins

Johann F.W. Burger, Herbert Kolodziej, Richard W. Hemingway, Jan P. Steynberg, Desmond A. Young, Daneel Ferreira

Journal:

Year:

1990

Language:

english

File:

PDF, 730 KB

english, 1990

16

Synthesis of poly(hydroxy)carboxylates-part II. Addition of polyols to maleate homogeneously catalysed by multivalent metal ions

Jeroen van Westrenen, Robin M. Roggen, Mattheus A. Hoefnagel, Joop A. Peters, Antonius P.G. Kieboom, Herman van Bekkum

Journal:

Year:

1990

Language:

english

File:

PDF, 1.33 MB

english, 1990

17

New intermediates in the oxidative polymerisation of 5,6-dihydroxyindole to melanin promoted by the peroxidase/H2O2 system

Marco d'Ischia, Alessandra Napolitano, Kostantino Tsiakas, Giuseppe Prota

Journal:

Year:

1990

Language:

english

File:

PDF, 701 KB

english, 1990

18

The four-carbon elongation of three-carbon chiral synthons using 2-(trimethylsiloxy)furan: highly stereocontrolled entry to enantiomerically pure seven-carbon α,β-unsaturated 2,3-dideoxy-aldonolactones

Giovanni Casiraghi, Lino Colombo, Gloria Rassu, Pietro Spanu, Giovanna Gasparri Fava, Marisa Ferrari Belicchi

Journal:

Year:

1990

Language:

english

File:

PDF, 1.22 MB

english, 1990

19

Synthesis of (9z,15z)-(11s,12s,13s)-11-hydroxy-12,13-epoxyoctadecadienoic acid : Application of 'sharpless kinetic resolution' to allyl propargyl alcohols

J S Yadav, P Radhakrishna

Journal:

Year:

1990

Language:

english

File:

PDF, 610 KB

english, 1990

20

α-Oxoketene-S,S-, N,S- and N,N-acetals: Versatile intermediates in organic synthesis

H. Junjappa, H. Ila, C.V. Asokan

Journal:

Year:

1990

Language:

english

File:

PDF, 4.42 MB

english, 1990

21

Catalytic iron-mediated ene carbocyclizations: formal [4+4]-ene reactions of triene esters

James M. Takacs, Peter W. Newsome, Cynthia Kuehn, Fusao Takusagawa

Journal:

Year:

1990

Language:

english

File:

PDF, 1.43 MB

english, 1990

22

Total synthesis of (±)-phaseic acid

Garth D. Abrams, Suzanne R. Abrams, Lloyd A.K. Nelson, Lawrence V. Gusta

Journal:

Year:

1990

Language:

english

File:

PDF, 790 KB

english, 1990

23

Synthesis of 6h-pyrido[4,3-b]carbazoles

Sandeep P. Modi, Todd McComb, Abdel-Hadi Zayed, R. Christopher Oglesby, Sydney Archer

Journal:

Year:

1990

Language:

english

File:

PDF, 514 KB

english, 1990

24

Synthesis of (+)-cassiol, a potent antiulcerogenic compound

Tetsuyuki Uno, Hidenori Watanabe, Kenji Mori

Journal:

Year:

1990

Language:

english

File:

PDF, 376 KB

english, 1990

25

Aromatic nucleophilic substitution reactions of 1-dialkylamino-substituted activated benzenes with various amines in dimethyl sulfoxide

Shizen Sekiguchi, Hiromi Ishikura, Yukitoshi Hirosawa, Nobuyuki Ono

Journal:

Year:

1990

Language:

english

File:

PDF, 600 KB

english, 1990

26

Ageliferins, potent actomyosin Atpase activators from the Okinawan marine sponge Agelas sp

Jun'ichi Kobayashi, Masashi Tsuda, Tetsuya Murayama, Hideshi Nakamura, Yasushi Ohizumi, Masami Ishibashi, Michiko Iwamura, Tomihisa Ohta, Shigeo Nozoe

Journal:

Year:

1990

Language:

english

File:

PDF, 423 KB

english, 1990

27

Secondary metabolites by chemical screening-6 cleavage of elaiophylin and transformation into a spiroketal building block

Peter Hammann, Gerhard Kretzschmar

Journal:

Year:

1990

Language:

english

File:

PDF, 437 KB

english, 1990

28

Heteroaromaticity. 4 The status of phosphorus and arsenic as heteroatoms

Journal:

Year:

1990

Language:

english

File:

PDF, 433 KB

english, 1990

29

Rearrangements of bridged diallenes. A facile synthesis of novel condensed heterocycles by tandem [3,3]-sigmatropic rearrangement and double intramolecular michael addition of diallenyl disulfides and diselenides. Isolation of stable diallenyl diselenides

Samuel Braverman, Meir Freund

Journal:

Year:

1990

Language:

english

File:

PDF, 1.50 MB

english, 1990

30

A new general and efficient synthesis of imidazo[4,5-c]pyrazole derivatives

Chiara Beatrice Vicentini, Augusto Cesare Veronese, Paolo Giori, Bruno Lumachi, Mario Guarneri

Journal:

Year:

1990

Language:

english

File:

PDF, 958 KB

english, 1990

31

Electrochemical ring-contraction of fused [1,3,4]thiadiazinium salts: preparation of fused pyrazole derivatives

Pedro Molina, M. Desamparados Velasco, Antonio Arques

Journal:

Year:

1990

Language:

english

File:

PDF, 792 KB

english, 1990

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