Catalytic Enantioselective Allylations of Acetylenic Aldehydes via 2-Propanol-Mediated Reductive Coupling
作者:Gilmar A. Brito、Franco Della-Felice、Guoshun Luo、Alexander S. Burns、Ronaldo A. Pilli、Scott D. Rychnovsky、Michael J. Krische
DOI:10.1021/acs.orglett.8b01776
日期:2018.7.6
O-benzoates modified by (S)-SEGPHOS or (S)-Cl,OMe-BIPHEP catalyze enantioselective 2-propanol-mediated reductive couplings of diverse nonmetallic allyl pronucleophiles with the acetylenic aldehyde TIPSC≡CCHO. Absolute stereochemistries of the resulting secondary homoallylic–propargylic alcohols were assigned using Rychnovsky’s competing enantioselective conversion method.
( S )-SEGPHOS 或 ( S )-Cl,OMe-BIPHEP 修饰的环金属化 π-烯丙基C,O-苯甲酸酯催化多种非金属烯丙基亲核试剂与乙醛 TIPSC=CCHO 的对映选择性 2-丙醇介导的还原偶联。使用 Rychnovsky 的竞争性对映选择性转化方法确定所得仲高烯丙醇-炔丙醇的绝对立体化学。