| 摘要 |
Compounds of the formulae I and Ia in the form of mixtures of diastereome rs or pure diastereomers, (I), (Ia), where R1 is a hydrogen atom or C1-C4-al kyl and R'1 is C1-C4-alkyl; X1 and X2 are each, independently of one another , a sec-phosphino group; T is C6-C20-arylene or C4-C18- heteroarylene having heteroatoms selected from the group consisting of O, S, -N= and N(C1-C4-alk yl); v is 0 or an integer from 1 to 4; X1 is bound in the ortho position rel ative to the T-C* bond; Q is vinyl, methyl, ethyl, -CH2-OR, -CH2-N(C1-C4-alk yl)2 or a C- or S-bonded chiral group which directs metals of metallation re agents into the ortho position; R is hydrogen, a silyl radical or an aliphat ic, cycloaliphatic, aromatic or aromatic-aliphatic hydrocarbon radical which has from 1 to 18 carbon atoms and is unsubstituted or substituted by C1-C4- alkyl, C1-C4-alkoxy, F or CF3; are ligands for metal complexes as homogeneou s catalyst in asymmetric syntheses.
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