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Communication | Special issue | Vol 7, No. 2, 1977, pp.863-870
Published online, 1st January, 1970
DOI: 10.3987/S-1977-02-0863
Reactions of New Cyclic Sulphur 1,4-Ylide, 9-Cyano-10-methyl-10-thiaanthracene with Electrophiles

Mikio Hori,* Tadashi Katraoka, Hiroshi Shimizu, and Sachio Ohno

*Department of Pharmacognosy, Gifu College of Pharmacy, 6-1 Mitahora-higashi 5-chome, Gifu 502-8585, Japan


Reaction of 9-cyano-10-methyl-10-thiaanthracene (1) and dimethyl acetylenedicarboxylate gave the novel intramolecular rearrangement products, 9-cyano-9-R-thioxanthenes (2, 3 and 4) besides 9-cyano-9-methylthioxanthene (5) and thioxanthone (6). And also 9-cyano-9-(dicyanomethyl)thioxanthene (12) and others were obtained from the treatment of 1 with tetracyanoethylene.