Kinetic Resolution of Tertiary Alcohols by Chiral DMAP Derivatives: Enantioselective Access to 3-Hydroxy-3-substituted 2-Oxindoles
作者:Hiroki Mandai、Ryuhei Shiomoto、Kazuki Fujii、Koichi Mitsudo、Seiji Suga
DOI:10.1021/acs.orglett.0c03956
日期:2021.2.19
We developed an efficient acylative kinetic resolution of 3-hydroxy-3-substituted 2-oxindoles by a chiral DMAP derivative having a 1,1′-binaphthyl with two tert-alcohols units. A wide range of 3-hydroxy-3-substituted oxindoles having various functional groups were efficiently resolved (14 examples, up to s = 60) in the presence of 1 mol % of catalyst within 3–9 h. Multigram-scale reactions (10 g) also
我们通过具有1,1'-联萘基和两个叔醇单元的手性DMAP衍生物开发了3-羟基-3-取代的2-氧吲哚的有效酰基动力学拆分。在1 mol%的催化剂存在下3到9个小时内,可以有效地拆分各种具有各种官能团的3-羟基-3-取代的羟吲哚(14个实例,最高s = 60)。数克级反应(10 g)也在5 h内以高s因子(s = 43)进行。