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Synthesis of heterocycles : Synthesis of 4H-1,4-benzothiazines

✍ Scribed by R.P. Soni; M.L. Jain

Book ID: 107858233
Publisher: Elsevier Science
Year: 1980
Tongue: French
Weight: 112 KB
Volume: 21
Category: Article
ISSN: 0040-4039
DOI: 10.1016/0040-4039(80)80180-8

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## 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