Rapid Asymmetric Synthesis of Disubstituted Allenes by Coupling of Flow-Generated Diazo Compounds and Propargylated Amines
作者:Jian-Siang Poh、Szabolcs Makai、Timo von Keutz、Duc N. Tran、Claudio Battilocchio、Patrick Pasau、Steven V. Ley
DOI:10.1002/anie.201611067
日期:2017.2.6
We report herein the asymmetric coupling of flow‐generated unstabilized diazo compounds and propargylated amine derivatives, using a new pyridinebis(imidazoline) ligand, a copper catalyst and base. The reaction proceeds rapidly, generating chiral allenes in 10–20 minutes with high enantioselectivity (89–98 % de/ee), moderate yields and a wide functional group tolerance.
我们在此报告了使用新的吡啶双(咪唑啉)配体,铜催化剂和碱对流动生成的不稳定重氮化合物和炔丙基化的胺衍生物的不对称偶联。反应迅速进行,在10–20分钟内生成手性烯丙基,具有高对映选择性(89–98%de / ee),中等收率和宽泛的官能团耐受性。