Chiral Primary Amine Catalyzed Enantioselective Protonation via an Enamine Intermediate
作者:Niankai Fu、Long Zhang、Jiuyuan Li、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1002/anie.201105477
日期:2011.11.25
Enamine protonation: A chiral diamine catalyzes an asymmetric Friedel–Crafts reaction through catalytic enantioselective protonation of an enamine. This process can be applied to a range of α‐substituted acroleins and indoles with high yields of products and high enantioselectivity (up to 94 % ee). An OH/π interaction between H2O and the indole ring was found to play an important role in the transition
烯胺质子化:手性二胺通过烯胺的对映选择性质子化催化不对称的Friedel-Crafts反应。该方法可用于一系列α-取代的丙烯醛和吲哚,具有高收率和高对映选择性(最高94%ee)。的O H / H之间的π相互作用2 O和吲哚环,发现发挥在过渡状态中起重要作用(参见方案)。