Aldol-additions t0eα- and β-alkoxy aldehydes: The effect of chelation on simple diastereoselectivity
作者:M.T. Reetz、K. Kesseler、A. Jung
DOI:10.1016/s0040-4020(01)98807-6
日期:——
reaction of enol silanes with chiralα- and β-alkoxyaldehydes constitutes the only presently known, general way to perform aldol additions with chelation-control (asymmetric induction 90%). If the enol silane is prochiral, the additional stereoselection (simple diastereoselectivity) is surprisingly good. This unusual effect has been traced to syn-type of complexation of the aldehyde function.