The potential for extended stereocontrol in silyl group-transfer cyclizations was explored in model studies which formed four contiguous chiral centers. The diastereofacial selectivity for the reaction of cyclized intermediates was outstanding for both fluoride and SnCl2 trityl chloride mediated reactions. Good simple diastereoselectivity was observed in reactions initiated by prochiral silyl enolates.
在形成四个连续手性中心的模型研究中探索了甲
硅烷基转移环化中扩展立体控制的潜力。对于
氟化物和 SnCl2 三苯
甲基氯介导的反应,环化中间体反应的非对映选择性都很突出。 在前手性甲
硅烷基烯醇化物引发的反应中观察到良好的简单非对映选择性。