characterized by X-ray diffraction analysis. The chiral rare-earth metal complexes 1–7 displayed high reactivity in the asymmetric hydrophosphonylation of α,β-unsaturated ketones, and 5 mol % of complex 7 together with 10 mol % of chiral diamine (1S,2S)-1,2-cyclohexanediamine were proved to be the optimal catalyst combination. Various hydrophosphonylation products with excellent yields and high to excellent
手性双核稀土
金属配合物 RE 2 L n 2 ( n = 1, RE = Y( 1 ), Eu( 2 ), Nd( 3 ), La( 4 ), Gd( 5 ); n = 2, RE = Eu( 6 ), Gd( 7 )) 由相应的 Trost
配体 H 3 L 1或 H 3 L 2 (H 3 L 1 = ( S , S )-2,6-bis[2-(hydroxydiphenylmethyl)pyrrolidin-)稳定1-基甲基]-4-甲基
苯酚,H 3 L 2 = (制备了S , S )-2,6-双[2-(羟基二苯甲基)
吡咯烷-1-基甲基]-4-
氯苯酚),并通过 X 射线衍射分析表征了三个未知的配合物5-7 。手性稀土
金属配合物1-7在 α,β-不饱和酮的不对称氢膦酰化反应中表现出高反应性,5 mol% 的配合物 7与10 mol% 的手性二胺 (1 S ,2 S )-1, 2-
环己二胺被证