STUDY OF TAUTOMERIC AND ISOMERIC BEHAVIOR OF NEW 2-ARYLHYDRAZONO-1,4-BENZOTHIAZINES

Authors
FROHBERG P BAUMEISTER U STROHL D DANZ H
Citation
P. Frohberg et al., STUDY OF TAUTOMERIC AND ISOMERIC BEHAVIOR OF NEW 2-ARYLHYDRAZONO-1,4-BENZOTHIAZINES, Heterocycles, 45(6), 1997, pp. 1183-1190
Citations number
13
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Heterocycles → ACNP
ISSN journal
03855414
Volume
45
Issue
6
Year of publication
1997
Pages
1183 - 1190
Database
ISI
SICI code
0385-5414(1997)45:6<1183:SOTAIB>2.0.ZU;2-A
Abstract
Cyclization reactions of alpha-ketohydrazonyl chlorides such as methyl 6-arylhydrazono-6-chloro-5-oxohexanoates (2) and the 6-arylhydrazono- 6-chloro-5-oxohexanoic acids (3) with o-aminothiophenol lead to 1,4-be nzothiazine derivatives. The tautomeric and isomeric equilibria are di scussed using H-1 and N-15 NMR as well as X-Ray diffraction analysis.