Lewis Acid Mediated Reactions of Cyclopropyl Aryl Ketones with α-Ketoesters: Facile Preparation of 5,6-Dihydropyran-2-ones
作者:Yong-Hua Yang、Min Shi
DOI:10.1021/jo051815z
日期:2005.11.1
A newgeneralmethod for the synthesis of 5,6-dihydropyran-2-ones from cyclopropyl arylketones (monoactivated cyclopropanes) and α-ketoesters in good to excellent yields has been developed. The process involves a cascade of reactions, including a nucleophilic ring-opening reaction of monoactivated cyclopropane by H2O, Lewis acid mediated transesterification, and an aldol type reaction.