Enantio- and Diastereoselective Synthesis of Hydroxy Bis(boronates) via Cu-Catalyzed Tandem Borylation/1,2-Addition
作者:Jacob C. Green、Matthew V. Joannou、Stephanie A. Murray、Joseph M. Zanghi、Simon J. Meek
DOI:10.1021/acscatal.7b01123
日期:2017.7.7
Catalytic enantioselective synthesis of 1-hydroxy-2,3-bisboronate esters through multicomponent borylation/1,2-addition is reported. Catalyst and substrates are readily available, form both a C–B and C–C bond, and generate up to three contiguous stereocenters. The reaction is tolerant of aryl, vinyl, and alkyl aldehydes and ketones in up to 95% yield, >20:1 dr, and 99:1 er. Intramolecular additions
报道了通过多组分硼化/1,2-加成催化对映选择性合成 1-羟基-2,3-二硼酸酯。催化剂和底物很容易获得,形成 C-B 和 C-C 键,并生成最多三个连续的立体中心。该反应可耐受芳基、乙烯基和烷基醛和酮,产率高达 95%,dr 大于 20:1,er 大于 99:1。醛和酮的分子内加成导致立体发散过程。羟基双(硼酸酯)酯产品适合进行位点选择性化学加工。