Organocatalytic Enantio- and Diastereoselective Construction of <i>syn</i>-1,3-Diol Motifs via Dynamic Kinetic Resolution of In Situ Generated Chiral Cyanohydrins
作者:Akira Matsumoto、Keisuke Asano、Seijiro Matsubara
DOI:10.1021/acs.orglett.9b00677
日期:2019.4.19
syn-1,3-dioxanes as protected 1,3-diols via dynamic kinetic resolution of in situ generated chiral cyanohydrins has been developed. This method involves a reversible cyanohydrin formation/hemiacetalization/intramolecular oxy-Michael addition reaction cascade, affording a chiral syn-1,3-diol structure with simultaneous construction of two stereogenic centers. The use of trifluoromethyl ketones is crucial
已开发了一种通过原位生成的手性氰醇的动态动力学拆分方法不对称合成作为保护性1,3-二醇的合成-1,3-二恶烷的有机催化方法。该方法涉及可逆的氰醇形成/半缩醛化/分子内氧基-迈克尔加成反应级联,提供了手性合成的1,3-二醇结构,同时构建了两个立体异构中心。三氟甲基酮的使用对于有效的三组分级联反应至关重要,并且手性双官能有机催化剂在手性syn -1,3-二醇基序的形成中具有很高的对映选择性和非对映选择性。