Polymer-Bound Pyridine-Bis(oxazoline). Preparation through Click Chemistry and Evaluation in Asymmetric Catalysis
作者:Mélanie Tilliet、Stina Lundgren、Christina Moberg、Vincent Levacher
DOI:10.1002/adsc.200700112
日期:2007.9.3
A pyridine-bis(oxazoline) ligand was efficiently immobilized by copper(I)-catalyzed azide-alkyne cycloaddition onto a polystyrene resin. The so obtained click-pybox resin 1a was associated with various metal salts (YbCl3, LuCl3, CuOTf) and the resulting resin-bound catalysts were explored in ring-opening of cyclohexene oxide, silylcyanation of benzaldehyde and alkynylation of imines. These new polymer-supported
通过铜(I)催化的叠氮化物-炔烃环加成反应将吡啶-双(恶唑啉)配体有效地固定在聚苯乙烯树脂上。如此获得的点击式box盒树脂1a与各种金属盐(YbCl 3,LuCl 3,CuOTf)缔合,并在环己烯氧化物的开环,苯甲醛的甲硅烷基氰化和亚胺的炔基化反应中探索了与树脂结合的催化剂。这些新型的聚合物负载型催化剂在催化活性,对映选择性和可回收性方面表现出良好至优异的性能。