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Communication | Regular issue | Vol 4, No. 7, 1976, pp.1243-1248
Published online, 1st January, 1970
DOI: 10.3987/R-1976-07-1243
Reactions of N4S4 with Benzil Mono- and Bishydrazone

Masashi Tashiro* and Shuntaro Mataka

*Research Institute of Industrial Science, Faculty of Engineering, Kyushu University, 6-1, Kasuga-koen, Kasuga 816-8580, Japan


The reactions of N4S4 with benzil mono- (1) and bishydrazone (2) were carried out in refluxing toluene. In the reaction with 1, 2-benzoyl-2,4,5-triphenylisoimidazole (3), which was assumed to be the intermediate for the lophine formation in the reaction of benzil with ammonia, was isolated together with 3,4-diphenyl-1,2,5-thiadiazole (4), benzilazine (5) and diphenylacetamide (6), however, the compound (3) was not the intermediate. In the reaction with 2, 4 was isolated in a modest yield with a trace of a novel compound, 5,6-diphenyl-1,3,2,4-dithiadiazine (7).