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Communication | Regular issue | Vol 22, No. 3, 1984, pp.467-470
Published online, 1st January, 1970
DOI: 10.3987/R-1984-03-0467
An Extremely Mild Thermolysis of Several 2-(2-Halogeno-2-propenylsulfinyl)tropones

Hitoshi Takeshita,* Hideshi Motomura, Kingo Uchida, and Hiroaki Mametsuka

*Instituete of Advanced Material Study, Kyushu University, 6-1, Kasuga-koen, Kasuga 816-8580, Japan


By heating 2-(2-chloro-2-propenylsulfinyl)tropanes at above 110 °C afforded 3-chloro-4H,9H-cyclohepta[b]thiopyran-9-ones and their S-oxides. Accompanied formation of di(2-troponyl)disulfides indicated the thermolysis to be a radical, non-concerted intermolecular reaction.