Diphosphines containing silane groups, immobilised diphosphines and the use thereof as hydrogenation catalysts

摘要: Compounds of formula I ##STR1## wherein R1 denotes identical or different radicals and is linear branched C1 -C12 alkyl, unsubstituted C5 -C6 cycloalkyl which substituted by -C4 alkyl alkoxy, phenyl benzyl, both substituents a group (R1)2 P are o,o'-diphenylene, R2 hydrogen, R3 alkylene, R4 C2 -C18 phenylene benzylene, R5 phenyl, can be applied to solid carriers, such as silica gel aerosils, complexed with rhodium iridium compounds. These materials heterogeneous separable catalysts for the asymmetrical hydrogenation prochiral compounds containing carbon double bonds carbon/hetero atom bonds, example ketones imines.