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Communication | Regular issue | Vol 45, No. 5, 1997, pp.841-845
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7767
Convenient Preparation of 1-Azaazulene Derivatives by the Reaction of Tropon-imines with Enamines

Makoto Nitta* and Tohru Takayasu

*Department of Chemistry, School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan

Abstract

Troponimines having OH, OMe, OMs, and OTs group on the nitrogen atom react with pyrrolidine enamines to give formal [8+2] cycloadducts, which undergo spontaneous aromatization to give 1-azaazulene derivatives in good to moderate yield.