Intramolecular Lewis-acid promoted (2+2) cycloadditions: An efficient total synthesis of (±)-coronafacic acid via an internal Diels-Alder reaction.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

Intramolecular Lewis-acid promoted (2+2) cycloadditions: An efficient total synthesis of (±)-coronafacic acid via an internal Diels-Alder reaction.

Authors:	Michael E. Jung Kim M. Halweg

Affiliation:	Department of Chemistry, University of California Los Angeles, California 90024 U.S.A.

Abstract:	Internal (2+2) cycloaddition of the ester $7$ gave the cyclobutene $8$ in fair yield; cyclization of the readily derived trienone $4$ and hydrolysis produced coronafacic acid in 7% overall yield.

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