Iridium complexes, process for their preparation and their use

Details Iridium complexes, process for their preparation and their use Iridium complexes, process for their preparation and their use

1990-09-11

1992-05-12

Shen, Cecilia

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

Organic compounds

Heavy metal containing

556 18, 556 19, 556136, 548402, 549206, 549209, 549212, C07F 1500, C07F 1702

Patent

active

051129990

ABSTRACT:
Compounds of general formula I or Ia ##STR1## or mixtures thereof, wherein the groups P-L-P are a ligand from the group comprising diphosphine and diphosphinite, in which the secondary phosphine groups or phosphinite groups P are coupled via 2 to 4 C atoms, and which form a 5-, 6- or 7-membered ring with the Ir atoms, X, X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5 and X.sup.6 independently of the others are Cl, Br or I, or X.sup.1 and X.sup.6 and H and X.sup.2, X.sup.3, X.sup.4 and X.sup.5 independently of the others are Cl, Br or I, or X.sup.1 and X.sup.5 and H and X.sup.2, X.sup.3, X.sup.4 and X.sup.6 independently of the others are Cl, Br or I, and M.sup..sym. is an alkali metal cation or quaternary ammonium. The compounds are suitable as homogeneous catalysts for the (preferably) asymmetric hydrogenation of N-substituted imines to secondary amines.

REFERENCES:
patent: 4994615 (1991-02-01), Spindler et al.
patent: 5011995 (1991-04-01), Pugin et al.
J. of Organom. Chem. 173, pp. 231-251 (1979).
J. of Organom. Chem. 133, pp. 231-271 (1977).
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J. Chem. Soc. (A), 1971, 2334-2337.
Brunie, J. Mazan, pp. 225-232.
J. Powell et al, CA 68-105339z (1968).
J. Powell et al, CA 68-105340t (1968).
Spindler et al, CA 112-138725c (1990) ef. EP 256,982.
Pugin et al, CA 112-35277d (1990) ef. EP 301,457.

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