Merrifield resin-supported hydrocinchonidinium salts containing particular functional groups that can participate in hydrogen bonding were prepared and evaluated as chiral phase-transfer catalysts using the asymmetric benzylation of glycine imine ester. These electronically modified Merrifield resin-supported phase-transfer catalysts generally provided better enantioselectivities compared to the unmodified ones.
利用甘
氨酸
亚胺酯的不对称苄化反应,制备并评估了作为手性相转移催化剂的含有可参与氢键作用的特定官能团的 Merrifield
树脂支撑的氢化琥珀
酰亚胺盐。与未修饰的催化剂相比,这些电子修饰的 Merrifield
树脂支撑相转移催化剂通常具有更好的对映选择性。