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Communication | Regular issue | Vol 20, No. 6, 1983, pp.1013-1016
Published online, 1st January, 1970
DOI: 10.3987/R-1983-06-1013
Formation of 2-Alkylthio-substituted 2H-Pyrans in the Reaction of Cyclic 1,3-Diketones with Alkylthiodiphenylcyclopropenium Ions

Hiroshi Yoshida, Mikito Nakajima, Tsuyoshi Ogata, and Kiyoshi Matsumoto

*Department of Molecular Science, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu 432-8561, Shizuoka, Japan


The reaction of methylthio-, ethylthio-, and benzylthiodiphenylcyclopropenium salts with 5- and 6-membered cyclic 1,3-diketones giving 2-alkylthio-2H-pyrans in good yields is reported.