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Communication | Regular issue | Vol 29, No. 11, 1989, pp.2097-2100
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5178
Chemistry on Benzopentathiepin. Reactions of Benzopentathiepin with Active Methylene Compounds in the Presence of Base

Ryu Sato,* Yutaka Kanazawa, Yasuo Akutsu, and Minoru Saito

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

Abstract

Benzopentathiepin (BPT) reacted with various active methylene compounds such as malononitrile, ethyl cyanoacetate, ethyl acetoacetate, acetylacetone, ethyl 2-chloroacetoacetate, and ethyl α-chloropropionate in the presence of base such as triethylamine or sodium ethoxide to give dithiins, dithioles, or 1,2,4-trithiin in satisfactory yields.