Direct Synthesis of Chiral 3-Arylsuccinimides by Rhodium-Catalyzed Enantioselective Conjugate Addition of Arylboronic Acids to Maleimides
作者:Balraj Gopula、Shu-Han Yang、Ting-Shen Kuo、Jen-Chieh Hsieh、Ping-Yu Wu、Julian P. Henschke、Hsyueh-Liang Wu
DOI:10.1002/chem.201501059
日期:2015.7.27
ligands L1–L10 were utilized in the enantioselective 1,4‐addition reaction of arylboronic acids to N‐substituted maleimides. In the presence of 2.5 mol % of RhI/L2, enantioenriched conjugate addition adducts were isolated in 72–99 % yields with 86–98 % ee. This protocol offers a convenient method to access a variety of 3‐arylsuccinimides in a highly enantioselective manner. Maleimides with readily cleavable
包含2,5-二芳基取代的双环[2.2.1]二烯配体L1 - L10的手性铑催化剂用于芳基硼酸与N-取代的马来酰亚胺的1,4-加成对映选择性反应。在存在2.5 mol%Rh I / L2的情况下,分离出对映体富集的共轭加合物,收率为72–99%,ee为86–98% 。该协议提供了一种方便的方法,可以以高对映选择性的方式访问各种3-芳基琥珀酰亚胺。具有易于裂解的N-保护基的马来酰亚胺被耐受,从而能够合成有用的合成中间体。吡咯烷4中,生物活性化合物和吡咯烷5,一个ENT -precursor到HSD-1抑制剂,合成以证明该方法的效用。