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Synthesis of indeno[2,1‐ b ][1,4]benzothiazine derivatives from 2‐bromoinden‐1‐ones
Author(s) -
Bajji Ashok C.,
Nan'ya Seiko,
Butsugan Yasuo
Publication year - 1993
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570300212
Subject(s) - benzothiazine , chemistry , 2 aminopyridine , medicinal chemistry , stereochemistry , organic chemistry
Abstract 2‐Bromoinden‐1‐ones 2 were condensed with 6‐substituted 3‐aminopyridine‐2(1 H )‐thiones to produce a new type of 4‐azaindeno[2,1‐ b ][1,4]benzothiazine derivatives 3 . Substituted 6‐phenylindeno[2,1‐ b ][1,4]benzothiazines 4 were also prepared by reacting 2‐bromo‐5‐methoxy‐ and 2,6‐dibromo‐5‐methoxyinden‐1‐ones with o ‐aminobenzenethiol.