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Paper | Special issue | Vol 44, No. 1, 1997, pp.187-196
Published online, 1st January, 1970
DOI: 10.3987/COM-95-S7
New Sulfur-Carbon Displacement Reaction and Systematic Desulfurization in Multi-Sulfur Linkages of Benzopentathiepin

Satoshi Ogawa, Makoto Wagatsuma, and Ryu Sato*

*Department of Applied Chemistry, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan

Abstract

Benzopentathiepin reacts with phosphorus ylides to form a mixture of benzotetrathiepins and benzotrithiins. The carbanion fragment of the phosphorus ylides replaces the one or two sulfur atoms in the multi-sulfur linkages of benzopentathiepin. Systematic desulfurization to form a new cyclic system is accomplished by the use of a combination of phosphorus ylide and triphenylphosphine in the reactions of benzopentathiepin, benzotetrathiepins, and benzotrithiins.