SnCl4-Mediated Reactions of Cyclopropyl Alkyl Ketones with α-Keto Esters
作者:Yong-Hua Yang、Min Shi
DOI:10.1002/ejoc.200600618
日期:2006.12
to good yields with good stereoselectivitiesvia the sequential nucleophilic ring-opening reaction of cyclopropane by H2O, aldol type reaction and subsequent cyclic transesterification mediated by the Lewis acid. The mechanism was further confirmed by introducing a substituent at the other α-position of the cyclopropyl alkyl ketone to produce two or three other products without the formation of spiro-γ-lactone