Alkyl C−O Ring Cleavage of Bicyclic β-Lactones with Normant Reagents: Synthesis of a Merck IND Intermediate
作者:Wei Zhang、Andrea S. Matla、Daniel Romo
DOI:10.1021/ol070572p
日期:2007.5.1
diastereoselective Cu(I)-mediated, bicyclic beta-lactone ring cleavage reactions with either alkyl or aryl cuprates proceeded with inversion of stereochemistry to give optically active trans-substituted cyclopentanes and cyclohexanes. Optimization of typically problematic aryl cuprate additions was made possible by minimization of a competing bromide-induced ring cleavage process. The utility of this process