Ferrocenediphosphines
US8106227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2007 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Nov 19, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula I in the form of enantiomerically pure diastereomers or a mixture of diastereomers, (I), where the radicals R1 are identical or different and are each C1-C4-alkyl; m is 0 or an integer from 1 to 3; n is 0 or an integer from 1 to 4; R2 is a hydrocarbon radical or a C-bonded heterohydrocarbon radical; Cp is unsubstituted or C1-C4-alkyl-substituted cyclopentadienyl; Y is a C-bonded chiral group which directs metals of metallation reagents into the ortho position; and Phos is a P-bonded P(III) substituent. The compounds are chiral ligands for complexes of transition metals which are used as homogeneous catalysts in asymmetric syntheses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.