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Communication | Regular issue | Vol 22, No. 7, 1984, pp.1497-1500
Published online, 1st January, 1970
DOI: 10.3987/R-1984-07-1497
Novel Ring Contractions of 2,7-Dihydro-3,6-diphenyl-1,4,5-thiadiazepine via a Halogenation-dehalogenation Process

Kichinosuke Kamata and Otohiko Tsuge*

*Kurume Technical College, Komorinocho 1232, Kurume, Fukuoka 830-0001, Japan

Abstract

2,7-Dihydro-3,6-diphenyl-1,4,5-thiadiazepine undergoes novel ring contractions via a halogenation-dehalogenation process in methanol, giving sulfur-containing five-membered cyclic compounds: this result is a great contrast to the ring contraction with extrusion of sulfur reported previously.