Volume 46; Issue 2

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Tetrahedron
Volume 46; Issue 2

Tetrahedron

Volume 46; Issue 2

1

Synthesis of anthracyclinones by electrophilic and nucleophilic addition to anthraquinones

Journal:

Year:

1990

Language:

english

File:

PDF, 2.08 MB

english, 1990

2

Reactivity of biologically important reduced pyridines VI. Lack of through-resonance stabilization in the ferricyanide-mediated oxidation of substituted 1-Phenyl-1,4-Dihydronicotinamides

Marcus E. Brewster, James J. kaminski, Zoltan Gabanyi, Klara Czako, Agnes Simay, Nicholas Bodor

Journal:

Year:

1990

Language:

english

File:

PDF, 436 KB

english, 1990

3

A new subgroup of bisbenzylisoquinoline alkaloids: (+)-cycleatjehenine and (+)-cycleatjehine

Bamrung Tantisewie, Kalaya Pharadai, Suratana Amnauypol, Alan J. Freyer, Helene Guinaudeau, Maurice Shamma

Journal:

Year:

1990

Language:

english

File:

PDF, 384 KB

english, 1990

4

An Ab initio study of substituent effects on 12-shifts in radicals

Charles E. Hudson, David J. McAdoo

Journal:

Year:

1990

Language:

english

File:

PDF, 266 KB

english, 1990

5

13C and 19F NMR Spectra of substituted ethyl α-fluorocinnamates. Application of the DSP-NLR equation

Charles N. Robinson, Gregory E. Stablein, Carl D. Slater

Journal:

Year:

1990

Language:

english

File:

PDF, 460 KB

english, 1990

6

Palominol, a new diterpene based on the dolabellane skeleton from the caribbean gorgonian octocorals eunicea calyculata and eunicea laciniata

Janet Cáceres, Maria Elena Rivera, Abimael D. Rodriguez

Journal:

Year:

1990

Language:

english

File:

PDF, 639 KB

english, 1990

7

The preparation and properties of peracetylated D-xylo-oligosaccharides with all residues in the aldehydrol form

Ashoke Banerjee, Brian Capon

Journal:

Year:

1990

Language:

english

File:

PDF, 378 KB

english, 1990

8

Studies on samarium diiodide initiated addition reaction of fluoroalkyl iodides to alkynes and its mechanism

Shengming Ma, Xiyan Lu

Journal:

Year:

1990

Language:

english

File:

PDF, 423 KB

english, 1990

9

Adamantane isomers with given symmetries. Systematic enumeration by unit subduced cycle indices

Shinsaku Fujita

Journal:

Year:

1990

Language:

english

File:

PDF, 950 KB

english, 1990

10

Bioactive substances from lespedeza cuneata L.G. Don and their biological activities

Hideyuki Shigemori, Naomi Sakai, Eiichi Miyoshi, Yoshikazu Shizuri, Shosuke Yamamura

Journal:

Year:

1990

Language:

english

File:

PDF, 715 KB

english, 1990

11

1-phenylazo-1-alkenes

Joachim G. Schantl, Paul Hebeisen

Journal:

Year:

1990

Language:

english

File:

PDF, 669 KB

english, 1990

12

A versatile regio- and stereospecific annulation method - III. : Preparation of substituted derivatives of cis-bicyclo[3.3.0]octanes cis-bicyclo[4.3.0]nonanes and cis-bicyclo[4.4.0]decanes

Edda Gössinger, Renate Müller, Thomas Pitterna

Journal:

Year:

1990

Language:

english

File:

PDF, 1.12 MB

english, 1990

13

Intermolecular potentials of EDA complexes by semi-empirical theory dispersion energy terms in the PM3 method

Josef Messinger, Volker Buss

Journal:

Year:

1990

Language:

english

File:

PDF, 703 KB

english, 1990

14

Premieres syntheses de tetrathiafulvalenes amphiphiles a partir de piperidino-2 thioxo-4 dithioles mesoioniques

F. Bertho, A. Robert, P. Batail, P. Robin

Journal:

Year:

1990

File:

PDF, 853 KB

1990

15

Synthese de N-amino maléimides et d'anhydrides maléiques disubstitués à partir d'α-halogéno hydrazides. Etude du mécanisme de la réaction

C. Florac, M. Baudy-Floc'h, A. Robert

Journal:

Year:

1990

File:

PDF, 555 KB

1990

16

Gem dicyano époxydes équivalents synthétiques des dications cétènes : synthése de thiazolidinone-4 par réaction avec des thiourées substituées et évolution particulière en (aryl-cyanoformyl) méthylène-2 benzoxazole par réaction avec le thioxo-2 benzoxazole

A.Majcen Le Maréchal, A. Robert, I. Leban

Journal:

Year:

1990

File:

PDF, 756 KB

1990

17

Chimie des sucres sans groupements protecteurs-II reactions selectives d'addition du D-glucose, du D-galactose et de D-glycosylamines a des heterocumulenes

Daniel Plusquellec, Fabienne Roulleau, Martine Lefeuvre, Eric Brown

Journal:

Year:

1990

File:

PDF, 777 KB

1990

18

Synthesis of bacterial C50 carotenoid sarcinaxanthin

J.P. Férézou, M. Julia

Journal:

Year:

1990

Language:

english

File:

PDF, 980 KB

english, 1990

19

Application of the phosphoramidite-phosphite triester approach for the synthesis of combinations between oxygenated sterols and nucleoside analogues linked by phosphodiester bonds

Yu-hua Jl, Willi Bannwarth, Bang Luu

Journal:

Year:

1990

Language:

english

File:

PDF, 1.32 MB

english, 1990

20

Templated synthesis of interlocked macrocyclic ligands, the catenands. Preparation and characterization of the prototypical bis-30 membered ring system

Christiane Dietrich-Buchecker, Jean-Pierre Sauvage

Journal:

Year:

1990

Language:

english

File:

PDF, 597 KB

english, 1990

21

Conjugate addition of the dianion of diaryl ketones to α, β- ethylenic ketones promoted by TiCl4-Mg

Jean-Marc Pons, Maurice Santelli

Journal:

Year:

1990

Language:

english

File:

PDF, 580 KB

english, 1990

22

Asymmetric deprotonation of prochiral ketones using chiral lithium amide bases

Christian M. Cain, Richard P.C. Cousins, Greg Coumbarides, Nigel S. Simpkins

Journal:

Year:

1990

Language:

english

File:

PDF, 1.29 MB

english, 1990

23

Synthesis of spiroethers using radical cyclisations

Donald S Middleton, Nigel S Simpkins, Michael J Begley, Nicholas K Terrett

Journal:

Year:

1990

Language:

english

File:

PDF, 1.31 MB

english, 1990

24

One pot synthesis and conformation of N-t-butyloxycarbonyl, O-Phenacyl derivatives of proline and other secondary amino acids

John Hondrelis, Greg Lonergan, Stavros Voliotis, John Matsoukas

Journal:

Year:

1990

Language:

english

File:

PDF, 673 KB

english, 1990

25

Cyclocondensation of oxoketene dithioacetals with 3-aminopyrazoles: a facile highly regioselective general route to substituted and fused pyrazolo a]pyrimidines

Abraham Thomas, Manjaree Chakraborty, Hiriyakkanavar Ila, Hiriyakkanavar Junjappa

Journal:

Year:

1990

Language:

english

File:

PDF, 745 KB

english, 1990

26

A fast procedure for the reduction of azides and nitro compounds based on the reducing ability of Sn(SR)3-species

Marti Bartra, Pedro Romea, Fèlix Urpí, Jaume Vilarrasa

Journal:

Year:

1990

Language:

english

File:

PDF, 692 KB

english, 1990

27

Intramolecular cyclization reactions of pyrimidinium cations

A.E. Frissen, G. Geurtsen, A.T.M. Marcelis, H.C. van der Plas

Journal:

Year:

1990

Language:

english

File:

PDF, 858 KB

english, 1990

28

Dihydroisobenzofurans and isoindolines by intramolecular inverse Diels-Alder reactions of pyridines

Marek Biedrzycki, Dick A. de Bie, Henk C. van der Plas

Journal:

Year:

1990

Language:

english

File:

PDF, 432 KB

english, 1990

29

Short stereoselective synthesis of dl-alloyohimbane and dl-epialloyohimbane

Mauri Lounasmaa, Reija Jokela

Journal:

Year:

1990

Language:

english

File:

PDF, 251 KB

english, 1990

30

The clemmensen reduction of pentacyclo [6.4.0.02,7.03,11.06,10]dodecane-9,12-dione

F.J.C. Martins, L. Fourie, H.J. Venter, P.L. Wessels

Journal:

Year:

1990

Language:

english

File:

PDF, 576 KB

english, 1990

31

Isomerizations of N-(α-aminoalkyl)-1,2,4-triazoles and N-(α-aminoalkyl)tetrazoles

Alan R. Katritzky, Andrzej Jóźwiak, Ping Lue, Konstantina Yannakopoulou, Gus J. Palenik, Zhang Ze-Ying

Journal:

Year:

1990

Language:

english

File:

PDF, 518 KB

english, 1990

32

Synthesis of 3(5)-substituted 1,2,4-triazoles by lithiation of 1-(1-pyrrolidinomethyl)-1,2,4-triazole

Alan R. Katritzky, Ping Lue, Konstantina Yannakopoulou

Journal:

Year:

1990

Language:

english

File:

PDF, 539 KB

english, 1990

33

The synthesis and conformation in solution of cyclo[L-pro-L-leu-(gln)thz-(gly)thz-L-val] (dolastatin 3)

Cedric W. Holzapfel, Wynand J. van Zyl, Marita Roos

Journal:

Year:

1990

Language:

english

File:

PDF, 788 KB

english, 1990

34

Model studies for insect protein sclerotization: Oxidative loss of the side chain from 4-substituted catechols

Stephen G. Pyne, Roger J.W. Truscott, Maxwell M. Karin, Carmen Morales, Bernadette C. Walsh, Barbra L. Wynn

Journal:

Year:

1990

Language:

english

File:

PDF, 511 KB

english, 1990

35

A stepwise synthesis of functionalized calix [4]arenes and a calix[6]arene with alternate electron-withdrawing substituents

Javier de Mendoza, Pedro M. Nieto, Pilar Prados, Concha Sánchez

Journal:

Year:

1990

Language:

english

File:

PDF, 822 KB

english, 1990