Diasteroselective Preparation of Cyclopropanols Using Methylene Bis(iodozinc)
摘要:
A diastereoselective synthesis of trans-2-substituted cyclopropanols is outlined. Bimetallic CH2(ZnI)(2) was found to react with alpha-chloroaldehydes to give cyclopropanols in yields of 64-89% and dr's >= 10:1. The high trans-selectivity resulted from equilibration of the cyclopropoxide intermediates.