Base promoted synthesis of activated cyclopropanes bearing homologated carbonyl groups via tandem Michael addition–intramolecular enolate trapping
作者:Alessio Russo、Alessandra Lattanzi
DOI:10.1039/c1ob06487h
日期:——
A simple base promoted intramolecular Michael initiated ring closure reaction of γ-hydroxyenone derived diphenyl phosphinates with 1,3-indandione, enabled the synthesis of novel activated cyclopropanes with homologated carbonyl moiety in good yield. Promising levels of enantioselectivity are achieved when using cinchona derivatives as promoters.