There are described new optically active 3,4-bis-(diphenylphosphino)-pyrrolidines of the formula ##STR1## wherein Ph is a phenyl group and R is hydrogen, an alkyl group, an arylalkyl group or an acyl group, rhodium complexes containing a compound of formula (I) as its chiral ligands, said rhodium complexes having the formula [RH(en).sub.2 A].sup.+ X.sup.- (II), where (en).sub.2 is two molecules of a monoolefin or one molecule of a diolefin, A is an optically active compound of formula (I) and X.sup.- is a tetrafluoroborate, hexafluorophosphate or a perchlorate ion, and use of the rhodium complexes as catalysts for the homogeneous asymmetric hydrogenation of unsubstituted or .beta.-substituted .alpha.-acylamino-acrylic acids.
描述了一种新的光学活性3,4-双-(
二苯基膦基)-
吡咯烷化合物,其
化学式为##STR1##其中Ph为苯基,R为氢、烷基、芳基烷基或酰基;包含一种化合物为其手性
配体的
铑配合物,所述
铑配合物具有
化学式[RH(en).sub.2 A].sup.+ X.sup.- (II),其中(en).sub.2为两分子单烯烃或一分子二烯烃,A为
化学式(I)的光学活性化合物,X.sup.-为四
氟硼酸盐、
六氟磷酸盐或一
氯酸根离子;以及使用这些
铑配合物作为催化剂,对未取代或β-取代的α-酰
氨基
丙烯酸进行均相不对称氢化反应。