Organocatalyzed Sulfa-Michael Addition of Thiophenols on Trisubstituted α-Fluoroacrylates, a Straightforward Access to Chiral Fluorinated Compounds
作者:Xin Huang、Emilie David、Philippe Jubault、Tatiana Besset、Samuel Couve-Bonnaire
DOI:10.1021/acs.joc.0c02081
日期:2020.11.6
In this manuscript, a simple and efficient sulfa-Michael addition reaction of aryl thiols to trisubstituted α-fluoro-α,β-unsaturated esters both in racemic and, for the first time, in enantioselective version is reported. The commercially available dimer of cinchona derivatives (DHQ)2PYR was used as a catalyst. This strategy showed a great tolerance for various substrates and substituents, providing
在该手稿中,报道了在外消旋体中以及首次以对映体选择性的方式,芳基硫醇与三取代的α-氟-α,β-不饱和酯的简单有效的磺胺-迈克尔加成反应。金鸡纳衍生物(DHQ)2 PYR的可商购二聚体用作催化剂。该策略显示出对各种底物和取代基的高度耐受性,提供了中等至优异的产率,中等至优异的非对映选择性(2:1至> 99:1)和低至良好的对映选择性(2至87%)。该反应已被用于合成地尔硫卓和噻替西姆这两种治疗剂的氟化类似物。