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Communication | Regular issue | Vol 14, No. 10, 1980, pp.1445-1448
Published online, 1st January, 1970
DOI: 10.3987/R-1980-10-1445
Reaction of Pyridinium Disubstituted Methylides with Diphenylcyclopropenethione

Kiyoshi Matsumoto* and Yukio Ikemi

*Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan


Diphenylcyclopropenethione undergoes nucleophilic attack by pyridinium disubstituted ylides (1a-e) to produce the corresponding indeno-2-thiopyrone (3), 2-pyrone (5 or 10), 1-thio-2-pyrone (6, 8, 11, or 12), and/or 2-thiopyrone (4) derivatives.