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Paper | Regular issue | Vol 32, No. 8, 1991, pp.1517-1526
Published online, 1st January, 1970
DOI: 10.3987/COM-91-5726
Heterocyclization Reactions of Chlorosulfonyl Isocyanate with Ethyl 3-Oxo-2-(arylhydrazono)butanoates

Joseph Daniel and Durga Nath Dhar*

*Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India


Reaction of chlorosulfonyl isocyanate with ethyl 3-oxo-2-(arylhydrazono)butanoates (1a-i) gave thiadiazolotriazinediones (3a-i) and thiatriazinothioxapyridazines (6a-i). Here a 1:2 reacton of the butanoate and CSI followed by cyclization is postulated.