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One‐pot synthesis of 4‐acylimino‐2‐aminothieno[2,3‐ d ][1,3]‐thiazines from 2‐thioureidothiophene‐3‐carbonitriles
Author(s) -
Gütschow Michael,
Leistner Siegfried,
Pink Maren
Publication year - 1992
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.5570290201
Subject(s) - chemistry , acetic anhydride , sulfuric acid , acetic acid , organic chemistry , medicinal chemistry , catalysis
A new one‐pot synthesis of 4‐acylimino‐2‐aminothieno[2,3‐ d ][1,3]thiazines 4 and 5 , respectively, from 2‐thioureidothiophene‐3‐carbonitriles 1 , acetic, propionic anhydride, respectively, and concentrated sulfuric acid is reported. The structure of 4a is confirmed by X‐ray structure analysis.