Enantioselective Synthesis of 1,2,3-Trisubstituted Cyclopropanes Using <i>gem</i>-Dizinc Reagents
作者:Lucie E. Zimmer、André B. Charette
DOI:10.1021/ja906033g
日期:2009.11.4
The first asymmetric cyclopropanation of allylic alcohols using gem-dizinc carbenoids, which allows the synthesis of 1,2,3-substituted cyclopropane derivatives in high yields and excellent enantio- and diastereoselectivities, is reported. The initially formed cyclopropylzinc undergoes an in situ B/Zn exchange with the stoichiometric chiral ligand to generate a cyclopropyl borinate that can be directly
报道了使用 gem-dizinc carbenoids 的烯丙醇的第一个不对称环丙烷化反应,该反应允许以高产率和优异的对映选择性和非对映选择性合成 1,2,3-取代的环丙烷衍生物。最初形成的环丙基锌与化学计量手性配体进行原位 B/Zn 交换,生成硼酸环丙基酯,可直接参与 Suzuki-Miyaura 交叉偶联反应。