The diastereoselective addition of 1,3-bis(trimethylsilyloxy)-1-methoxybutadiene 2 to readily available α-heterosubstituted aldehydes (S)-1 affords after syn-diastereoselective reduction HMG-CoA-reductase inhibitor-precursors (S,R,S)-4 and 5 with various substitution patterns and high enantiomeric and diastereoisomeric excesses (ee = 93–>96%; de = 95–>96%) in good yields.
将 1,3-双(三甲基
硅氧基)-1-甲氧基
丁二烯 2 非对映选择性地加成到容易获得的α-异构醛(S)-1 中,经过同步-非对映选择性还原,可得到
HMG-CoA 还原酶
抑制剂前体(S,R,S)-4 和 5,它们具有不同的取代模式和较高的对映异构体和非对映异构体过量率(ee = 93->96%;de = 95->96%),收率良好。