摘要:
Chiral allylsilane 2 reacted with chiral alpha-substituted aldehydes to afford the corresponding 1,4-syn-products with good diastereoselectivities. The best selectivities are observed when the reactions are carried out by transmetallation of allylsilane using Tin (IV) chloride in CH2Cl2, at -78 degrees C, before addition of the aldehydes. (C) 1998 Elsevier Science Ltd. All rights reserved.