作者:Andreas Pfaltz、Jörg Blankenstein、Robert Hilgraf、Esther Hörmann、Steven McIntyre、Frederik Menges、Marc Schönleber、Sebastian P. Smidt、Bettina Wüstenberg、Nicole Zimmermann
DOI:10.1002/adsc.200390027
日期:2003.1
efficient homogeneous catalysts for the enantioselective hydrogenation of olefins. The complexes are readily prepared, air-stable, and easy to handle. In contrast to chiral rhodium- and ruthenium-phosphine catalysts, they do not require the presence of a polar coordinating group near the CC bond. In the hydrogenation of unfunctionalized arylolefins, high enantioselectivities of >95% ee with turnover numbers
具有手性P,N-配体和四[3,5-(三氟甲基)苯基]硼酸酯(BAr F)作为抗衡离子的阳离子铱配合物是烯烃对映选择性氢化的有效均相催化剂。该配合物易于制备,空气稳定并且易于处理。与手性铑和钌膦催化剂相反,它们不需要在CC键附近存在极性配位基团。在未官能化芳基烯烃的氢化中,已经实现了> 95%ee的高对映选择性,具有高达5000的周转数和> 5000 h -1的周转频率。