Volume 32; Issue 38

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Tetrahedron Letters
Volume 32; Issue 38

Tetrahedron Letters

Volume 32; Issue 38

1

Phenylselenyl halides: efficient reagents for the selective halogenation and nitration of porphyrins

Hasrat Ali, Johan E. van Lier

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 185 KB

english, 1991

2

Synthesis of thioether derivatives of ethidium bromide

Gregory T. Whiteker, Stephen J. Lippard

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 83 KB

english, 1991

3

A route for the enantioselective total synthesis of antheridic acid, the antheridium-inducing factor from anemia phyllitidis

E.J. Corey, Hideo Kigoshi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 189 KB

english, 1991

4

Enantioselective synthesis of (+)-pinidine

Roland E. Dolle, Kelly I. Osifo, Chun-Sing Li

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 87 KB

english, 1991

5

One-pot synthesis of cyclic amidinium tetrafluoroborates and hexafluorophosphates; the simplest models of N5,N100methenyltetrahydrofolate coenzyme

Shahrokh Saba, AnneMarie Brescia, Moses K. Kaloustian

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 195 KB

english, 1991

6

An unusual reduction of ethylene occurring during the thermal decomposition of alkalides and electrides.

P.M. Cauliez, J.E. Jackson, J.L. Dye

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 225 KB

english, 1991

7

A mild, osmium tetraoxide-catalyzed method for the oxidation of sulfides to sulfones

Stephen W. Kaldor, Marlys Hammond

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 214 KB

english, 1991

8

“Remote” dianions 5. Synthesis of δ-coniceine

Diana L.C. Green, Charles M. Thompsonr

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 160 KB

english, 1991

9

Continuous electrochemical activation of flavoenzymes using polyethyleneglycol-bound ferrocenes as mediators: a model for the application of oxidoreductases as oxidation catalysts in organic synthesis

Markus Frede, Eberhard Steckhan

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 224 KB

english, 1991

10

Multiple column solid phase glycopeptide synthesis

Stefan Peters, Tim Bielfeldt, Morten Meldal, Klaus Bock, Hans Paulsena

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 228 KB

english, 1991

11

Synthesis of 23-oxa-calcitriol derivatives

Günter Neef, Andreas Steinmeyer

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 162 KB

english, 1991

12

Improved preparation of angelate esters

Benoît Hartmann, Alice M. Kanazawa, Jean-Pierre Deprés, Andrew E. Greene

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 221 KB

english, 1991

13

Oxidative functionalization of some aspidosperma alkaloids with trifluoroacetic anhydride.

Jean Lévy, Mustapha Soufyane, Catherine Mirand, Michèle Döé de Maindreville, Daniel Royer

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 160 KB

english, 1991

14

Enzyme-catalyzed synthesis of carbohydrates: synthetic potential of transketolase

Colette Demuynck, Jean Bolte, Laurence Hecquet, Valérie Dalmas

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 189 KB

english, 1991

15

Preparation of optically pure 1,2,5-triphenylphospholane. Use as ligand for enantioselective transition-metal catalysis.

Jean-Claude Fiaud, Jean-Yves Legros

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 193 KB

english, 1991

16

Thermal rearrangement of N-silymethylated azadienes to N-silylated 2-pyrrolines

Mitsuru Ohno, Hiroyuki Miyata, Mitsuo Komatsu, Yoshiki Ohshiro

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 188 KB

english, 1991

17

Intramolecular Sm2+ and Sm3+ promoted reaction of γ-oxy-δ-ketoaldehyde; stereocontrolled formation of pinacol and lactone

Jun'ichi Uenishi, Souichiro Masuda, Shoji Wakabayashi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 178 KB

english, 1991

18

Intermolecular addition of α-alkoxycarbonyl-β-stannylvinyl radicals to electron-deficient alkenes. Simple addition and [2+2+2] annulation reactions

Eun Lee, Chang Uk Hur

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 109 KB

english, 1991

19

Efficient method for introducing vineomycin-fridamycin-type side chain. Total synthesis of fridamycin E

Takashi Matsumoto, Hideki Jona, Miyoko Katsuki, Keisuke Suzuki

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 183 KB

english, 1991

20

New Water-soluble pyropheophorbide a derivatives as possible agents for photodynamic therapy of cancer

Tomoyuki Ando, Yoko Suzuki, Rieko Geka, Kazuhiro Irie, Koichi Koshimizu, Takeshi Takemura, Susumu Nakajima, Isao Sakata

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 210 KB

english, 1991

21

Calixarene-based molecular capsule

Takashi Arimura, Satoshi Matsumoto, Osamu Teshima, Takeshi Nagasaki, Seiji Shinkai

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 144 KB

english, 1991

22

One-step formation of furo[3,2-c]quinolin-4(5H)-ones by a new regioselective [2+3] photoaddition of methoxy-substituted 4-hydroxyquinolin-2-one with alkenes1

Hiroshi Suginome, Shinzo Seko, Atsushi Konishi, Kazuhiro Kobayashi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 179 KB

english, 1991

23

Preparation of (4S)-4-hydroxy-3-methyl-2-(2′-propynyl)-2-cyclopentenone by combination of enzymatic hydrolysis and chemical transformation

Hidenori Danda, Akira Maehara, Takeaki Umemura

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 152 KB

english, 1991

24

Configurational and conformational isomerization of 9,14-dimethyl-10, 12-bisdehydro[19]annulenone in neutral and acidic solutions

Gaku Yamamoto, Hiroyuki Higuchi, Hiroyuki Yamamoto, Jūro Ojima

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 209 KB

english, 1991

25

Two distinct conformational isomers of the 16-membered epoxyenone, the key synthetic intermediate of maridonolides. Conformational analysis and completely stereoselective reduction of the C9 carbonyl group1)

Tomohiro Matsushima, Noriyuki Nakajima, Osamu Yonemitsu, Tadashi Hata

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 184 KB

english, 1991

26

A formal total synthesis of aplysiatoxin

Hiroaki Okamura, Satoru Kuroda, Satoru Ikegami, Yoshio Ito, Tsutomu Katsuki, Masaru Yamaguchi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 100 KB

english, 1991

27

Diazabutadienes in heterocyclic syntheses: reaction of 1,3-diazabutadienes with 2-oxazolin-5-ones

Bir Sain, Satyendra P. Singh, Jagir S. Sandhu

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 101 KB

english, 1991

28

Structure and stereochemistry of magniflorine, a new indole alkaloid from hamelia magniflora wernha

Angel Rumbero, Purificación Vásquez

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 120 KB

english, 1991

29

An efficient preparation of optically active (E)-γ-hydroxy-α,β-unsaturated phenyl sulfones using lipase-mediated acylations

Esteban Domínguez, Juan Carlos Carretero, Alfonso Fernández-Mayoralas, Santiago Conde

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 221 KB

english, 1991

30

Curve crossing analysis and rate - 13C chemical shift correlation in Michael reaction.

Z. Gross, Shmaryahu Hoz

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 162 KB

english, 1991

31

On the role of free radicals in the photochemical interactions of free base and monocationic forms of haematoporphyrin with an unsaturated fatty acid

G. Móger, L. Korecz, D. Gál

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 168 KB

english, 1991

32

Synthesis of an ecdysteroid inhibitor of ecdysone biosynthesis

Antony Mauvais, Charles Hetru, Bang Luu

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 178 KB

english, 1991

33

Heterogeneous Catalytic Asymmetric Dihydroxylation of Olefins with the OsO4/Poly(9-O-Acylquinine-co-Acrylonitrile) System

Dario Pini, Antonella Petri, Antonio Nardi, Carlo Rosini, Piero Salvadori

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 161 KB

english, 1991

34

Cobalt(II)chloride catalysed acylation of anisole

Javed Iqbal, M.A. Khan, Naresh K. Nayyar

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 150 KB

english, 1991

35

Stereoselective synthesis of β-lactams

Alan D. Brown, Ernest W. Colvin

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 127 KB

english, 1991

36

A novel germacranolide-aminoacid adduct dimer from centaurea aspera

J.Alberto Marco, Juan F. Sanz, Alberto Yuste, Jasmin Jakupovic

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 130 KB

english, 1991

37

Graphical abstracts

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 591 KB

english, 1991

38

Synthesis of 2-amino C-glucosides and 2-amino C-glucosides spiroketals

Ronald Grondin, Yves Leblanc, Karst Hoogsteen

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 156 KB

english, 1991

39

Regioselectivity in electrophilic substitution of 5-aminoindoles and 5-aminoindolines: synthesis of pyrrolo[3,2-e]indoles and isomeric pyrrolo[2,3-f]indoles

Ganesh K.B. Prasad, Andrew Burchat, Gamini Weeratunga, Ian Watts, Gary I. Dmitrienko

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 206 KB

english, 1991

40

A highly selective synthesis of versatile (E)-1-phenylthio vinylstannanes

Plato A. Magriotis, John T. Brown, Mary E. Scott

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 224 KB

english, 1991

41

Enantiomerically Pure Epoxychromans via Asymmetric Catalysis

Nam Ho Lee, Alexander R. Muci, Eric N. Jacobsen

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 193 KB

english, 1991

42

A new synthesis of soluble poly(1,4-phenylenevinylene)s and poly(2,5-pyrimidinylenevinylene)s

Holger Kretzschmann, Herbert Meier

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 179 KB

english, 1991

43

Non-beckmann rearrangement of a steroidal ketoxime

Günter Neef, Günter Michl

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 90 KB

english, 1991

44

Stereocontrolled synthesis of (−)-allosamizoline using D-glucosamine as a chiral template

Shunya Takahashi, Hiroyuki Terayama, Hiroyoshi Kuzuhara

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 205 KB

english, 1991

45

Didemnilactone and neodidemnilactone, two new fatty acid metabolites possessing a 10-membered lactone from the tunicate didemnum moseleyi (herdman)

Haruki Niwa, Hideaki Inagaki, Kiyoyuki Yamada

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 133 KB

english, 1991

46

Synthesis of aplysiatoxin: stereoselective synthesis of key fragments

Hiroaki Okamura, Satoru Kuroda, Kenji Tomita, Satoru Ikegami, Yu-ichi Sugimoto, Shin-ich Sakaguchi, Tsutomu Katsuki, Masaru Yamaguchi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 202 KB

english, 1991

47

Reactions of 2,3-O-isopropylidene derivatives of furanose sugars with organomagnesium and organolithium, nucleophiles

Boualem Mekki, Gurdial Singh, Richard H. Wightman

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 199 KB

english, 1991

48

Regiocontrolled set promoted photocyclisation of 2-alkyl-1-piperidine and pyrrolidine propanols: stereoselective synthesis of cis-α,α′-dialkyl piperidines and pyrrolidines via tetrahydro-1,3-oxazines

Ganesh Pandey, P.Yella Reddy, U.T. Bhalerao

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 183 KB

english, 1991

49

Solution conformation and inversion barrier in p-tert-butyl-25,27-dihydroxycalix[4]arene

Flavio Grynszpan, Silvio E Biali

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 198 KB

english, 1991

50

cis-3a-(o-Nitrophenyl)octahydroindol-4-one. building blocks for the synthesis of indole alkaloids

Daniel Solé, Josep Bonjoch

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 183 KB

english, 1991

51

Total synthesis of (−)-mintlactone

Miguel Carda, J.Alberto Marco

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 100 KB

english, 1991

52

Total synthesis of cervinomycin A1-trimethyl ether and cervinomycin A2-methyl ether

Goverdhan Mehta, Shailesh R. Shah

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 188 KB

english, 1991

53

Total syntheses of (±) cervinomycins A1 and A2

AV Rama Rao, J.S. Yadav, K Kishta Reddy, Velaparthi Upender

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 172 KB

english, 1991

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