Study of Tautomeric and Isomeric Behaviour of New 2-Arylhydrazono-1,4-benzothiazines
摘要:
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-benzothiazine derivatives. The tautomeric and isomeric equilibria are discussed using H-1 and N-15 NMR as well as X-Ray diffraction analysis.
Study of Tautomeric and Isomeric Behaviour of New 2-Arylhydrazono-1,4-benzothiazines
摘要:
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-benzothiazine derivatives. The tautomeric and isomeric equilibria are discussed using H-1 and N-15 NMR as well as X-Ray diffraction analysis.
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-benzothiazine derivatives. The tautomeric and isomeric equilibria are discussed using H-1 and N-15 NMR as well as X-Ray diffraction analysis.