Solvent-Free Asymmetric Olefin Hydroformylation Catalyzed by Highly Cross-Linked Polystyrene-Supported (<i>R,S</i>)-BINAPHOS−Rh(I) Complex
作者:Fumitoshi Shibahara、Kyoko Nozaki、Tamejiro Hiyama
DOI:10.1021/ja034447u
日期:2003.7.1
iso/normal ratio of 95/5 and 90% ee. Less volatile olefins, such as styrene, vinyl acetate, 1-alkenes, and fluorinated alkenes, were successfully converted into the corresponding isoaldehydes with high ee values, when they were injected through a supercritical CO(2)-flow column reactor. Successive injection of a series of olefins realized the conversion of an olefin library into an optically active aldehyde
使用共价锚定在高度交联的聚苯乙烯载体上的 (R,S)-BINAPHOS-Rh(I) 催化剂,在没有有机溶剂的情况下进行烯烃的不对称加氢甲酰化。顺式-2-丁烯(一种气态底物)的反应在分批反应器中用 H(2) (12 atm) 和 CO (12 atm) 处理后,提供了具有 100% 区域选择性和 82% ee 的 (S)-2-甲基丁醛配备固定床。该聚合物负载型催化剂适用于连续气相流塔反应器,从而将3,3,3-三氟丙烯转化为异/正比为95/5和90%ee的(S)-2-三氟甲基丙醛. 挥发性较低的烯烃,如苯乙烯、醋酸乙烯酯、1-烯烃和氟化烯烃,成功地转化为相应的具有高 ee 值的异醛,当它们通过超临界 CO(2) 流动柱式反应器注入时。连续注入一系列烯烃,实现了烯烃库向旋光醛库的转化。