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Report | Regular issue | Vol 16, No. 7, 1981, pp.1203-1204
Published online, 1st January, 1970
DOI: 10.3987/R-1981-07-1203
A New and Efficient Approach to a 4H-1,3-Benzothiazine Ring Thet Utilises the Photo-cyclisation of N-o-Iodobenzoylthioamides: the Ring Trasformation of Isothiazoles

Tarozaemon Nishiwaki,* Etsuko Kawamura, Noritaka Abe, Yoshiro Sasaoka, and Hirafumi Kochi

*Department of Chemistry, Faculty of Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Japan


The photo-cyclisation of N-o-iodobenzoylthioamides has been found to provide a novel and efficient synthesis of 4H-1,3-benzothiazin-4-ones.