The chiral phosphine ligand (R)-1,2-bis (diphenyiphosphi- no)-1-cyclohexylethane, when complexed to a transition metal such as Rh(l), functions as a superior chiral hydrogenation catalyst. The chiral phosphine ligand is more stereochemically rigid than previous compounds; consequently, virtually optically pure materials can be produced from the chiral hydrogenation of prochiral compounds using the catalyst of this invention. This catalyst is especially useful in the chiral hydrogenation of alpha-acylamido acrylic acids.
手性
膦配体(R)-1,2-双(二苯基
磷)-1-环己基
乙烷与过渡
金属(如 Rh(l))络合后,可作为一种优良的手性氢化催化剂。手性
膦配体比以前的化合物具有更高的立体
化学刚性;因此,使用本发明的催化剂对原手性化合物进行手性氢化,可以制备出几乎光学纯度的材料。这种催化剂尤其适用于α-酰
氨基
丙烯酸的手性氢化。