coordination in a Pd(II) complex of a phosphine-phosphoramidite ligand 1, which showed excellent enantioselectivity (up to 99.4% ee) in Rh-catalyzed hydrogenation of α-dehydroamino esters in acetone. A dramatic solvent effect was found in the hydrogenation of itaconates, which induces opposite chiralities of the product with the same catalytic system by the use of different solvents (e.g., 99.6% ee (R) in TFE
X射线衍射实验表明,膦-亚
磷酰胺
配体1的Pd(II)络合物中有趣的三
磷二齿配位,在Rh催化的
丙酮中α-脱氢
氨基酯的加氢反应中表现出出色的对映选择性(高达99.4%ee)。 。在
衣康酸酯的氢化中发现了显着的溶剂效应,通过使用不同的溶剂(例如,
TFE中的99.6%ee(R)与甲基中的71.2%ee(S),在相同的催化体系下诱导了相反的手性乙基酮)。