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Communication | Regular issue | Vol 24, No. 6, 1986, pp.1557-1560
Published online, 1st January, 1970
DOI: 10.3987/R-1986-06-1557
A Facile Synthesis of 4-Aryl-2H-1,4-benzothiazin-3(4H)-ones: Reaction of N,N-Diarylacetamides with Thionyl Chloride

Hisatoshi Konishi,* Masayuki Takishita, Hiroaki Koketsu, Tamon Okano, and Jitsuo Kiji

*Department of Materials Science, Faculty of Engineering, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan


The reaction of N,N-diarylacetamides with thionyl chloride yielded 4-aryl-2,2-dichloro-2H-1,4-benzothiazin-3(4H)-ones, which reacted with methanol to give 2,2-dimethoxy derivatives in good yield