Diphosphines containing silane groups, immobilised diphosphines

Details Diphosphines containing silane groups, immobilised diphosphines Diphosphines containing silane groups, immobilised diphosphines

1992-01-21

1993-10-12

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549221, C07F 708, C07F 928

Patent

active

052527514

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 asymmetrical hydrogenation of prochiral compounds containing carbon double bonds or carbon/hetero atom double bonds, for example ketones and imines.

REFERENCES:
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Advanced Organic Chemistry, 3rd Edition, J. March, pp. 802-803, 1985.
"Acylation by Ketens and Isocyanates A Mechanistic Comparison", by D. P. N. Satchell, Chem. Soc. Rev., vol. 4 No. 1, 1975, pp. 231-245.
Achiwa, J. Chem. Jap. Soc., Chem. Letters, pp. 905-908 (1978).
Nagel, et al.; J. Chem. Soc., Chem. Commun., pp. 1098-1099 (1986).
Kolb, et al., React Kiret. Catal. Let. 7(2), pp. 199-204 (1977).

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