Chemistry of hydrocarbon compounds – Adding hydrogen to unsaturated bond of hydrocarbon – i.e.,... – Using transition metal-containing catalyst
Patent
1994-02-16
1995-01-17
Pal, Asok
Chemistry of hydrocarbon compounds
Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...
Using transition metal-containing catalyst
564423, 564489, C07C 236, C07C20922
Patent
active
053827295
ABSTRACT:
Compounds of formula I ##STR1## wherein R.sub.1 denotes identical or different radicals and is linear or branched C.sub.1 -C.sub.12 alkyl, unsubstituted C.sub.5 -C.sub.6 cycloalkyl or C.sub.5 -C.sub.6 cycloalkyl which is substituted by C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, or is phenyl or benzyl, or both substituents R.sub.1 of a group (R.sub.1).sub.2 P are o,o-diphenylene, R.sub.2 is hydrogen, linear or branched C.sub.1 -C.sub.12 alkyl, phenyl or benzyl, R.sub.3 is C.sub.1 -C.sub.12 alkylene, R.sub.4 is C.sub.2 -C.sub.18 alkylene, phenylene or benzylene, and R.sub.5 is C.sub.1 -C.sub.6 alkyl or phenyl, can be applied to solid carriers, such as silica gel or aerosils, and complexed with rhodium or iridium compounds. These materials are heterogeneous and separable catalysts for the assymetrical hydrogenation of prochiral compounds containing carbon double bonds or carbon/hetero atom double bonds, for example ketones and imines.
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Muller Manfred
Pugin Benoit
Spindler Felix
Ciba-Geigy Corporation
Mansfield Kevin T.
Pal Asok
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