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Communication | Regular issue | Vol 6, No. 7, 1977, pp.933-939
Published online, 1st January, 1970
DOI: 10.3987/R-1977-07-0933
The Reaction of N4S4 with Phenylacetylene and Methyl Propiolate

Masashi Tashiro,* Shuntaro Mataka, and Kazufumi Takahashi

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


The reaction of N4S4 with phenylacetylene (1d) and methyl propiolate (1e) was investigated. The reaction with 1d gave 3-phenyl- (2d), 3-amino-4-phenyl-1,2,5-thiadiazole (4d) and [1,2,5-thiadiazolo]dithiatriazapentalene (5) in 15, 5 and 8% yields respectively. The reaction with afforded the corresponding 1,2,5-thiadiazoles, 2e and 3e in 7 and 5% yields respectively, together with a small amount of trithiadiazepine (6) and the adduct (7) of the fragment arising from the cleavage of the C≡C bond of 1e with N3S3.