Direct Access to Alkylideneoxindoles via Axially Enantioselective Knoevenagel Condensation
作者:Simone Crotti、Nicola Di Iorio、Chiara Artusi、Andrea Mazzanti、Paolo Righi、Giorgio Bencivenni
DOI:10.1021/acs.orglett.9b00505
日期:2019.5.3
The organocatalytic axially enantioselective Knoevenagel condensation between prochiral cyclohexanones and oxindoles is presented. The reaction, promoted by a primary amine, proceeded smoothly and furnished unprecedented examples of novel cyclohexylidene oxindoles displaying axial chirality.
提出了手性环己酮和羟吲哚之间的有机催化轴向对映选择性Knoevenagel缩合反应。由伯胺促进的反应进行得很顺利,并提供了显示出轴向手性的新型环己叉基吲哚的空前实例。