New Regiocontrolled Synthesis of Functionalized Pyrroles from 2-Azetidinone-Tethered Allenols
作者:Benito Alcaide、Pedro Almendros、Rocío Carrascosa、María C. Redondo
DOI:10.1002/chem.200700788
日期:2008.1.7
A new one-pot approach to synthesize densely substituted racemic and enantiopure pyrrolesfrom beta-lactams has been developed. The approach relies on the regiocontrolled cyclization of beta-allenamine intermediates derived from the ring opening of 2-azetidinone-tetheredallenols. In this approach four points of diversity are introduced, one of which is the position of the allene moiety on the beta-lactam