Chiral Phosphoric Acid-Catalyzed Enantio- and Diastereoselective Allylboration of Aldehydes with β,γ-Substituted Allylboronates
作者:Jinping Yuan、Pankaj Jain、Jon C. Antilla
DOI:10.1021/acs.joc.2c00764
日期:2022.6.17
The catalytic asymmetric addition of β,γ-substituted allylboronates to aldehydes has been described. Promoted by 5 mol % chiral phosphoric acid, the reactions were broadly applicable, scalable, and efficient, allowing for the formation of 3,4-anti/syn-homoallylic alcohols bearing adjacent tertiary or quaternary stereogenic centers in a highly enantio- and diastereoselective manner (≤99% ee and dr >20:1)
已经描述了 β,γ-取代的烯丙基硼酸酯对醛的催化不对称加成。在 5 mol% 手性磷酸的促进下,该反应具有广泛的适用性、可扩展性和高效性,允许以高度对映和非对映选择性的方式形成带有相邻叔或季立体中心的 3,4-反/同-高烯丙醇(≤99% ee 和 dr >20:1)。涉及手性磷酸的刚性椅子状过渡态有助于高度控制的反应。