A Polystyrene-Supported, Highly Recyclable Squaramide Organocatalyst for the Enantioselective Michael Addition of 1,3-Dicarbonyl Compounds to β-Nitrostyrenes
作者:Pinar Kasaplar、Paola Riente、Caroline Hartmann、Miquel A. Pericàs
DOI:10.1002/adsc.201200526
日期:2012.11.12
A chiral squaramide has been supported onto a polystyrene (PS) resin through a copper-catalyzed azide–alkyne cycloaddition (CuAAC) reaction and used as a very active, easily recoverable and highly reusable organocatalyst for the asymmetric Michael addition of 1,3-dicarbonyl compounds to β-nitrostyrenes. The PS-supported squaramide could be recycled up to 10 times.
通过铜催化的叠氮化物-炔烃环加成(CuAAC)反应,将手性方酰胺被负载在聚苯乙烯(PS)树脂上,并用作非常活泼,易于回收和高度可重复使用的有机催化剂,用于1,3-二羰基不对称迈克尔加成反应β-硝基苯乙烯的化合物。PS支撑的方胺最多可回收10次。