The SN2′ displacement of menthone-derived allylic carbonates with cuprate reagents occurs with high diastereoselectivity. This method can be used in an iterative fashion to construct stereocenters bearing a 1,3-relationship in a carbon chain. Each iteration provides the adduct in greater than 99% de. The synthesis of three fragments of the polyether ionophore ionomycin is disclosed.Key words: menthone, chiral auxiliary, SN2′ displacement, cuprate, iteration, ionomycin.
薄荷醇衍生的烯丙基碳酸酯与铜酸盐试剂的S'N2位移具有高对映选择性。该方法可用于迭代方式构建碳链中具有1,3-关系的立体中心。每次迭代提供的加合物的去除率大于99%。披露了聚醚离子载体离子霉素的三个片段的合成。关键词:薄荷醇、手性辅助剂、S'N2位移、铜酸盐、迭代、离子霉素。