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Mass spectra of heterocyclic compounds VI. 3,4-dihydro-1H-2,3-benzothiazine 2,2-dioxides

✍ Scribed by Juan Zinczuk; Rodolfo D. Bravo; Orfeo O. Orazi; Renée A. Corral


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
369 KB
Volume
25
Category
Article
ISSN
1076-5174

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✦ Synopsis


Abstract

The mass fragmentation behaviour of 3,4‐dihydro‐1__H__‐2,3‐benzothiazine 2,2‐dioxides was studied. The rationalizations suggested are supported by accurate mass measurements, metastable evidence and deuterium labelling.


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Novel heterocycles. Synthesis of 2,3-dih
✍ Frank T. Coppo; Maged M. Fawzi 📂 Article 📅 1998 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 413 KB 👁 1 views

## Abstract The reaction of 2‐chloro‐4‐(methylsulfonyl)benzoyl chloride (5) with 1‐methyl‐1__H__‐2,1‐benzothiazin‐4‐(3__H__)‐one 2,2‐dioxide (4) gave the __O__‐benzoyl compound, 1‐methyl‐2,2‐dioxido‐1__H__‐2,1‐benzothiazin‐4‐yl 2‐chloro‐4‐(methylsulfonyl)benzoate (6), which rearranged to give the C