1,2-diastereoselection induced by chiral silicon in the addition of Grignard reagents to acylsilanes
摘要:
The reaction of acylsilanes 1 with Grignard reagents gives the diastereomeric alpha-hydroxysilanes 3. The level of asymmetric induction depends on the nature of R1 and R2. Good results were obtained for R1 = t-Bu, R2 = Me and R1 = alpha-Napht, R2 = Ph. Subsequent desilylation occurs with predominant inversion of configuration at carbon.