DABCO-catalyzed ring opening of activated cyclopropanes and recyclization leading to γ-lactams with an all-carbon quaternary center
作者:Shaoxia Lin、Ling Li、Fushun Liang、Qun Liu
DOI:10.1039/c4cc03392b
日期:——
A novel and efficient method for the construction of gamma-lactams with an all-carbon quaternary center is developed via a DABCO-catalyzed reaction of EWG-activated cyclopropanecarboxamides and electron-deficient alkenes. The process involves sequential ring-opening of activatedcyclopropanes, intermolecular Michael addition and intramolecular aza-cyclization.