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Mass spectra of some 2-amino-4H-3,1-benzothiazine and 2-Amino-4H-pyrido[4,3-d][1,3]thiazine Derivatives

✍ Scribed by László Prókai; Tamás Lóránd; András Fö;ldesi

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 205 KB
Volume: 24
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210240714

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✦ Synopsis

Amino-4H-pyrido[4,3-dj[ 1,3]thiazine Derivatives

Several heterocycles may exist in tautomeric forms. Mass spectral data on these classes of compounds may highlight the utility of the technique for their structure elucidation/ confirmation. The possible tautomerism of some recently synthesized 2-amino-4H-3,1-thiazines, which also exhibit antifungal activity, led us to investigate their mass spectral fragmentation under electron impact (EI) conditions.

Certain cyclic amides and thioamides (including 1,3-thiazines) are known to exist in imino and enamine forms' (Scheme 1).

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