Generation of Silicon-Centered Stereogenicity by Chiral Counteranion-Directed Desymmetrization of Silanediols
作者:Min Zhu、Martin Oestreich
DOI:10.1021/acscatal.3c02682
日期:2023.8.4
An enantiotopic group-selective monosilylation of silanediols using List’s counteranion-directed silylation methodology is reported. A silylium-ion-like silicon electrophile generated from an allylic silane paired with an imidodiphosphorimidate (IDPi) enables the enantioselective discrimination of the two hydroxy groups attached to the prochiral silicon atom. The enantioselectivity achieved in the
报道了使用 List 的反阴离子引导的甲硅烷基化方法对硅烷二醇进行对映基团选择性单甲硅烷基化。由烯丙基硅烷与亚氨基二磷酸酯 (IDPi) 配对生成的硅离子状硅亲电子试剂能够对连接到前手性硅原子的两个羟基进行对映选择性区分。通过随后的动力学拆分,进一步提高去对称步骤中实现的对映选择性,以获得具有高对映控制的硅立体二硅氧烷,以及少量的非手性三硅氧烷副产物。