Catalytic asymmetric hydrogenation of a compound of the formula ##STR1## wherein R, R.sup.1 and R.sup.2 each independently represent hydrogen, substituted or unsubstituted alkyl having from 1 to 5 carbon atoms or substituted or unsubstituted aryl, and R.sup.3 represents substituted or unsubstituted alkyl having from 1 to 5 carbon atoms or substituted or unsubstituted aryl, provided that, if only one of R and R.sup.1 is hydrogen the Z geometric isomer is hydrogenated, in the presence of a homogeneous, coordination complex catalyst comprising rhodium, iridium or ruthenium in combination with an optically active bis phosphine ligand provides an excellent level of optical purity.
化合物的催化不对称氢化反应,该化合物的
化学式为##STR1##
其中R,R.sup.1和R.sup.2各自独立地表示氢,取代或未取代的1至5个碳原子的烷基或取代或未取代的芳基,R.sup.3表示取代或未取代的1至5个碳原子的烷基或取代或未取代的芳基,但如果仅有R和R.sup.1中的一个是氢,则Z几何异构体被氢化,在存在由
铑,
铱或
钌与手性双
膦配体组成的均相配位复合物催化剂的情况下,提供了极高的光学纯度
水平。