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Communication | Regular issue | Vol 9, No. 10, 1978, pp.1413-1418
Published online, 1st January, 1970
DOI: 10.3987/R-1978-10-1413
A New Ring Transformation of Benzorhiazolines to 3-Oxo-2,3-dihydro-4H-1,4-benzothiazines or Benzothiazoles

Mikio Hori,* Tadashi Kataoka, Hiroshi Shimizu, and Yutaka Imai

*Department of Pharmacognosy, Gifu College of Pharmacy, 6-1 Mitahora-higashi 5-chome, Gifu 502-8585, Japan

Abstract

A new ring transformation of benzothiazolines to 3-oxo-2,3-dihydro-4H-1,4-benzothiazines or benzothiazoles was found in the reaction of 2,2-dimethyl- (1) or 2-methyl-2-phenylbenzothiazoline (2) with chloroacetyl chloride.