An intramolecular diels-alder approach to quassinoids—a stereoselective construction of a-aromatic klaineanone期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

An intramolecular diels-alder approach to quassinoids—a stereoselective construction of a-aromatic klaineanone

Authors:	Keiichiro Fukumoto Masatoshi Chihiro Yuichi Shiratori Masataka Ihara Tetsuji Kametani Toshio Honda

Affiliation:	1. Pharmaceutical Institute, Tohoku University, Aobayama, Sendai 980, Japan;2. Hoshi College of Pharmacy, Ebara 2-4-41, Shinagawa-ku, Tokyo 142, Japan

Abstract:	Thermolysis of a benzocyclobutene derivative ( $20$ ) prepared from norcamphor produced stereoselectively a tetracyclic compound ( $2$ ), which was converted to a lactone ( $21$ ) having correct stereochemistry at C₇, C₈, C₉, C₁₁, C₁₃, and C₁₄ positions of (±)-klaineanone.

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