AN EXPEDIENT NEW SYNTHESIS OF SUBSTITUTED CARBAZOLES VIA ALPHA-OXOKETENE ACETALS THROUGH HETEROAROMATIC ANNELATION METHODOLOGY

Authors
PATRA PK SURESH JR ILA H JUNJAPPA H
Citation
Pk. Patra et al., AN EXPEDIENT NEW SYNTHESIS OF SUBSTITUTED CARBAZOLES VIA ALPHA-OXOKETENE ACETALS THROUGH HETEROAROMATIC ANNELATION METHODOLOGY, Tetrahedron letters, 38(17), 1997, pp. 3119-3122
Citations number
21
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
38
Issue
17
Year of publication
1997
Pages
3119 - 3122
Database
ISI
SICI code
0040-4039(1997)38:17<3119:AENSOS>2.0.ZU;2-D
Abstract
A new general method for substituted carbazoles 4a-x has been develope d involving base induced conjugate addition-elimination sequence of in dole-3-acetonitriles 1 to various alpha-oxoketene S,S-,O,S- and N,S-ac etals 2a-x followed by cyclization of the intermediates 3 with p-tolue nesulfonic acid in refluxing benzene. (C) 1997 Published by Elsevier S cience Ltd.