Iridium complexes, process for their preparation and their use
US5112999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1990 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Sep 11, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F15/004
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.