A new electronically deficient atropisomeric diphosphine ligand (S)-CF3O-BiPhep was synthesized from 1-bromo-3-(trifluoromethoxy)benzene in high yield. The key steps included oxidative coupling with anhydrous ferric chloride and optical resolution by (+)-DMTA. The ligand afforded high performance for Ir-catalyzed asymmetric hydrogenation of quinolines with ee up to 92% and TON up to 25,000. It was
以1-
溴-3-(三
氟甲氧基)苯为原料,高收率合成了一种新的电子缺陷的阻转异构二
膦配体(S)-CF 3 O-BiPhep。关键步骤包括与无
水氯化
铁的氧化偶联和(+)-
DMTA的光学拆分。该
配体为ir高达92%的ee和TON高达25,000的Ir催化
喹啉的不对称加氢提供了高性能。它也成功地应用于ee高达87%的Pd催化的简单
吲哚的不对称加氢和ee高达97%的Rh催化的苯基
硼酸向2-
环己烯酮的不对称1,4-加成反应。