Chiral ligands of the formula I or II,
may be obtained in high enantiomeric purity from compounds of the formulae III or IV, respectively,
with suitable phosphines, where the symbols R1, R, n, R3, R4, R' are as described in claim 1. The products may be converted into transition metal complexes which are useful as catalysts for asymmetric hydrogenation reactions.
式子I或II的手性
配体,可以通过式子III或IV的化合物与适当的
膦配体高对映纯度地获得,其中符号R1、R、n、R3、R4、R'如权利要求1所述。这些产物可转化为过渡
金属配合物,用作不对称氢化反应的催化剂。