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Tautomerie von Heterocyclen, IX. Darstellung von substituierten Benzothiazinen und Benzoxazinen via N ‐Aroylchlorformamidine
Author(s) -
Ried Walter,
Erle HannsEberhard
Publication year - 1982
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19821150441
Subject(s) - chemistry , phenylhydrazine , tautomer , medicinal chemistry
Tautomerism of Heterocyclic Compounds, IX. Preparation of Substituted Benzothiazines and Benzoxazines via N ‐Aroylchloroformamidines The 2‐aminobenzothiazinones 3a – c are prepared by reaction of 1a – c with phenylhydrazine. The aromatic 2‐hydroxycarbonyl chlorides 4a , b react with 1‐cyanopyrrolidine to give the not isolated heterocyclic compounds 5a , b which are readily hydrolized to 6a , b .