Volume 32; Issue 41

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Tetrahedron Letters
Volume 32; Issue 41

Tetrahedron Letters

Volume 32; Issue 41

1

3,4-Didehydro-β,β-caroten-2-one, a new carotenoid from the eggs of the stick insect Anisomorpha buprestoides

Bradley S. Davidson, Thomas Eisner, Jerrold Meinwald

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 268 KB

english, 1991

2

The effect of phenyl substitution on the structure of benzylic anions

Peter W. Rabideau, Brian K. Wind, Andrzej Syguĺa

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 289 KB

english, 1991

3

Cycloaddition reactions of dimethyl maleate and fumarate with cyclopentadiene on γ-alumina. Competing mechanisms for epimerization of the diels-alder adducts.

Satinder Bains, Richard M. Pagni, George W. Kabalka

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 227 KB

english, 1991

4

Fragmentation reactions of an oxafluorodiazirine

Robert A. Moss, Tadeusz Zdrojewski

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 222 KB

english, 1991

5

Cyanopuupehenol, an antiviral metabolite of a sponge of the order Verongida

Mark T. Hamann, Paul J. Scheuer

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 139 KB

english, 1991

6

Silver tetrafluoroborate induced reaction of trimethylsilyl enol ethers with 2,3-diiodo-1-(phenylsulfonyl)-1-propene as a method for preparing substituted furans

Albert Padwa, Masaru Ishida

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 238 KB

english, 1991

7

The stereoselective crotylboration of alpha-oxocarboxylic acids

Zhe Wang, Xian-Jun Meng, George W. Kabalka

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 200 KB

english, 1991

8

Palladium-catalyzed oxidative dimerization of stannylquinones. A simple method for the synthesis of symmetrical 2,2′-bisquinones.

Lanny S. Liebeskind, Steven W. Riesinger

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 145 KB

english, 1991

9

Synthesis of a pyrido[1,2-a]purine nucleoside by a novel ring cleavage-annulation reaction of 3-β-D-ribofuranosylimidazo-[4,5-d]-v-triazin-4-one

Steven H. Krawczyk, Leroy B. Townsend

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 268 KB

english, 1991

10

N-acyldihydropyridones as synthetic intermediates. A short synthesis of (±)-pumiliotoxin C.

Daniel L. Comins, Ali Dehghani

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 237 KB

english, 1991

11

Biocatalytic desymmetrizations of pentitol derivatives

Kevin Burgess, Ian Henderson

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 261 KB

english, 1991

12

The photochemistry of three tetrachloronaphthalenes

Peter K. Freeman, Gary E. Clapp, Brian K. Stevenson

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 239 KB

english, 1991

13

Enantioselective route to α-hydroxy aldehyde and acid derivatives

E.J. Corey, Graham B. Jones

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 310 KB

english, 1991

14

Synthesis of oxazolidine derivatives of β-[3-(aryloxy)aryl]-α-amino acids by application of the diels-alder reaction

Richard K. Olsen, Xianqi Feng

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 296 KB

english, 1991

15

The synthesis of dibenzofuran based diacids and amino acids designed to nucleate parallel and antiparallel β-sheet formation.

Humberto Diaz, Jeffery W. Kelly

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 292 KB

english, 1991

16

Stereocontrolled synthesis of HIV-1 protease inhibitors with C2-axis of symmetry

Arun K. Ghosh, Sean P. McKee, Wayne J. Thompson

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 287 KB

english, 1991

17

Stereoselective cyclopropanation of homoallylic alcohols. Formal attachment of a cyclopropane to a preexisting ring

Jeffrey D. Winkler, Elizabeth A. Gretler

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 238 KB

english, 1991

18

Photochemistry of anthracene in water

Michael E. Sigman, S.P. Zingg, Richard M. Pagni, John H. Burns

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 238 KB

english, 1991

19

Synthesis of 2-amino-9-(3′-azido-2′,3′-dideoxy-beta-D-erythro-pentofuranosyl)-6-methoxy-9H-purine (AzddMAP) and AzddGuo

Merrick R. Almond, Jon L. Collins, Barbara E. Reitter, Janet L. Rideout, G.Andrew Freeman, Marty H. St Clair

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 271 KB

english, 1991

20

Stereoselective methylations of bicyclic lactams derived from pyroglutamic acid

Robert W. Armstrong, John A. DeMattei

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 278 KB

english, 1991

21

Synthesis of (±)-Pentalenene

Shikai Zhao, Goverdan Mehta, Paul Helquist

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 233 KB

english, 1991

22

Total synthesis of N-nornitidine

James H. Rigby, Daniel D. Holsworth

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 235 KB

english, 1991

23

Methylenecyclopropanecarboxylates and -dicarboxylates, efficient reagents for the [3 + 2] methylenecyclopentane annulation of unactivated and electron-rich alkenes

Daniel A. Singleton, Chad C. Huval, Kevin M. Church, E.Scott Priestley

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 286 KB

english, 1991

24

Asymmetric synthesis of topographically constrained amino acids: synthesis of the optically pure isomers of α,β-dimethyl-phenylalanine and α,β-dimethyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid

Wieslaw M. Kazmierski, Victor J. Hruby

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 234 KB

english, 1991

25

Enantioselective addition of (Z)- and (E)-alkenylzinc bromides to aldehydes: asymmetric synthesis of sec-allylalcohols

Wolfgang Oppolzer, Rumen N. Radinov

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 249 KB

english, 1991

26

First synthesis of a strained 14-membered biaryl ether lactone by macrolactonization

Karl Justus, Wolfgang Steglich

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 251 KB

english, 1991

27

Total synthesis of (+)-Yingzhaosu A

Xing-Xiang Xu, Jie Zhu, Da-Zhong Huang, Wei-Shan Zhou

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 224 KB

english, 1991

28

Synthesis of optically active γ-trimethylsilyl-β,γ-epoxy tertiary alcohols by the diastereoselective addition reaction of β-trimethylsilyl-α,β-epoxyketones with Grignard reagents

Sentaro Okamoto, Hiromi Tsujiyama, Toshiharu Yoshino, Fumie Sato

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 239 KB

english, 1991

29

Highly efficient and general method for synthesis of tertiary allylic alcohols in a chiral form. Synthesis of arbaprostil

Sentaro Okamoto, Toshiharu Yoshino, Hiromi Tsujiyama, Fumie Sato

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 237 KB

english, 1991

30

Paramiltioic acid, a novel rearranged norabietanoid from Salvia paramiltiorrhiza

Xiao-Ru Sun, Hou-Wei Luo, Tatsuko Sakai, Masatake Niwa

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 191 KB

english, 1991

31

Acyloxymethyl as an activating group in lipase-catalyzed enantioselective hydrolysis. A versatile approach to chiral 4-aryl-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylates.

Hirosato Ebiike, Yoshiyasu Terao, Kazuo Achiwa

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 267 KB

english, 1991

32

Novel generation of azomethine ylide from N-(α-silylbenzyl)amide by silicon shift: an equivalent of nitrile ylide

Mitsuru Ohno, Mitsuo Komatsu, Hiroyuki Miyata, Yoshiki Ohshiro

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 262 KB

english, 1991

33

Chiral Co(II) and Mn(II) catalysts for the 1,3-dipolar cycloaddition reactions of azomethine ylides derived from arylidene imines of glycine

Philip Allway, Ronald Grigg

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 189 KB

english, 1991

34

Zinc chloride as a new catalyst for knoevenagel condensation

P. Shanthan Rao, R.V. Venkataratnam

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 97 KB

english, 1991

35

Photolysis of N-2,4,6-trinitrophenyl substituted amino acids.

John Frederiksen, Bjarne D. Larsen, Niels Harrit

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 121 KB

english, 1991

36

A facile synthesis of alkylidenebutenolides via thermal rearrangement of benzisoxazolequinones

Tomás Torres, Wolfram Schäfer

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 241 KB

english, 1991

37

Synthesis of arylsulfonylcarbamic acid derivatives using a new, phosgene-free method

Gábor Besenyei, Sándor Németh, László I. Simándi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 226 KB

english, 1991

38

Geographical abstracts

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 730 KB

english, 1991

39

Hydrozirconation / transmetalation / alkylation: direct one-pot conversion of 1-alkynes to E-1,2-disubstituted alkenes

Bruce H. Lipshutz, Kaneyoshi Kato

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 228 KB

english, 1991

40

Synthesis and conformation of unsubstituted calix[4]arene

John E. McMurry, J.Christopher Phelan

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 259 KB

english, 1991

41

Preparation of enantiomerically enriched α-hydroxystannanes via enzymatic resolution

J.Michael Chong, Eduardo K Mar

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 301 KB

english, 1991

42

Leporin A: an antiinsectan N-alkoxypyridone from the sclerotia of Aspergillus leporis

Mark R. TePaske, James B. Gloer, Donald T. Wicklow, Patrick F. Dowd

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 330 KB

english, 1991

43

Selective functionalization of the C2 hydroxyl group of N-carbobenzyloxy-4,6-O-benzylidene-1-deoxynojirimycin

Daniel P. Getman, Gary A. DeCrescenzo, Robert M. Heintz

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 167 KB

english, 1991

44

An unexpected reversal in the stereochemistry of transannular cyclizations. A stereoselective synthesis of (±)-epilupinine.

Eric D. Edstrom

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 278 KB

english, 1991

45

Rapid synthesis of 2′,3′-dideoxycytidine (ddC) from a simple achiral precursor

Michael E. Jung, Claire Castro, John M. Gardiner

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 200 KB

english, 1991

46

Friedel-crafts reaction of α-(phenylseleno)carboethoxy methyl compounds

C.C. Silveira, E.J. Lenardão, J.V. Comasseto, M.J. Dabdoub

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 231 KB

english, 1991

47

A ligand structure-enantioselectivity relationship for the osmium-catalyzed asymmetric dihydroxylation of olefins

Yasukazu Ogino, Hou Chen, Eric Manoury, Tomoyuki Shibata, Matthias Beller, Doris Lübben, K. Barry Sharpless

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 312 KB

english, 1991

48

Phase transfer catalyzed tert-alkylations of cyclopentadiene and indene: indications for set processes

Eckehard V. Dehmlow, Christof Bollmann

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 276 KB

english, 1991

49

Enantiocontrol by intrinsic antiparallel double repulsion on diacetone-d-glucose template.: Enantioselective synthesis of alanine and chirally deuterated glycine

Katsumi Kakinuma, Takashi Koudate, Hui-Ying Li, Tadashi Eguchi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 332 KB

english, 1991

50

Anomeric effect on acidity; experimental and theoretical studies on proton abstraction at anomeric center of 1,5-anhydro-4,6-O-benzylidene-2,3-dideoxy-3-C-nitro-D-hex-2-enitol

Tohru Sakakibara, Tomohisa Nishitani, Akinori Seta, Toshio Nakagawa

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 255 KB

english, 1991

51

Regeneration of carbonyl compounds from semicarbazones by copper (II) chloride dihydrate

Ram N. Ram, Kiran Varsha

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 241 KB

english, 1991

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