Intramolecular Lewis-acid promoted (2+2) cycloadditions: An efficient total synthesis of (±)-coronafacic acid via an internal Diels-Alder reaction.
作者:Michael E. Jung、Kim M. Halweg
DOI:10.1016/s0040-4039(01)90538-6
日期:1981.1
Internal (2+2) cycloaddition of the ester gave the cyclobutene in fair yield; cyclization of the readily derived trienone and hydrolysis produced coronafacic acid in 7% overall yield.