synthesized. This soluble polymer-supported complex was found to catalyze the asymmetric addition of diethylzinc to a series of aromatic aldehydes in good yields and with good enantiomeric ratio (er). The PEG-supported catalyst could be recycled and reused up to three times. The reactivity and selectivity of the catalyst was dependent on the nature of the linker between the polymer and the complex
合成了与聚
乙二醇(P
EG)连接的手性Zn(II)-salen配合物。发现该可溶性聚合物负载的络合物以良好的产率和良好的对映体比率(er)催化
二乙基锌向一系列芳族醛的不对称加成。P
EG负载的催化剂最多可以循环使用3次。催化剂的反应性和选择性取决于聚合物和配合物之间的连接基的性质。