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Communication | Regular issue | Vol 9, No. 12, 1978, pp.1741-1744
Published online, 1st January, 1970
DOI: 10.3987/R-1978-12-1741
■ Reactions of Benzo-1,2-dithiole-3-thione with N,N’-Dialkyl-1,2-diaminoethanes. Synthesis of o-Thioquinonemethides with a Ketene Aminal Group

Renji Okazaki, Kyung-Tae Kang, and Naoki Inamoto*

*Department of Chemistry, Scool of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033

Abstract

Benzo-1,2-dithiole-3-thione (2) reacted with N,N’-dialkyl-1,2-diaminoethanes (2) to give o-thioquinonemethides with a ketene aminal group (4-6) in high yields, which were found to be of considerable betain nature significantly different from previously known o-thioquinonemethides with a ketene thioacetal group (1).