6,6′-bis-(1-phosphanorbornadiene) diphosphines, their preparation and their uses
US6521795B2 · kind B2 · utility
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1References
18Claims
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Assignee
Inventors
Key dates
| Filing date | Jun 4, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A subject of the present invention is new 6,6′-bis-(1-phosphanorbornadiene) diphosphines, their preparation process and their use in asymmetrical catalysis.The new diphosphines correspond to general formula (I): in which R1, R2, R3, R4, R5 are as defined in claim 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.