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Paper | Regular issue | Vol 31, No. 8, 1990, pp.1537-1542
Published online, 1st January, 1970
DOI: 10.3987/COM-90-5453
A New Synthesis of 5,6-Dihydro-4H-1,3,4-thiadiazine 1,1-Dioxides from Methyl Styrylsulfonylacetate

Masahiko Takahashi* and Ichiro Yamashita

*Department of Industrial Chemistry, Faculty of Engineering, Ibaraki University, 4-12-1 Nakanarusawamachi, Hitachi, Ibaraki 316-8511, Japan


Treatment of methyl styrylsulfonylacetate with arenediazonium chloirdes gave methyl styrylsulfonylglyoxylate arenehydrazones, which were cyclized on treatment with bases to 4-aryl-5-phenyl-5,6-dihydro-1,3,4-thiadiazine 1,1-dioxides, a hitherto unknown class of heterocycles.