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Patent US3978101A successfully refreshed from Google Patents.
US3978101A
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Rhodium complexes of asymmetric diphosphines, their preparation and their use
Assignee: Rhone Poulenc SA
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Filing: 1975-06-25
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Granted: 1976-08-31
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Expires: 1995-06-25
Abstract
Abstract Optically active diphosphines of the formula: R1 CH2-CH-CH2-P ANGLE ¦¦R2 ¦¦ ¦¦R1' CH2-CH-CH2-P ANGLE R2' in which the phosphinomethyl groups are trans to each other, from rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.
Inventors
- 👤 Paul Aviron-Violet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:38
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; B01J31/2409; B01J31/2414; B01J31/2442; B01J31/2447; B01J31/2452; B01J31/2457; C07F15/00; C07F15/0006; C07F15/0073; C07F15/008; C07F9/28; C07F9/50; C07F9/5027; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A rhodium complex in which the rhodium is bound to halogen and a diphosphine of the formula: ##EQU2## in which the phosphinomethyl groups are in the trans-position relative to one another, and the groups R 1 , R 2 , R' 1 and R' 2 , which may be identical or different, each represent straight or branched alkyl of 1 to 8 carbon atoms, cycloalkyl of 5 or 6 ring carbon atoms, or aryl consisting of one or more benzene rings which are bonded to one another by a valency bond or which form with one another an ortho- or peri-condensed system, the said aryl being unsubstituted or substituted by straight or branched alkyl of 1 to 4 carbon atoms, the said complex containing between 0.5 to 2 mols of said diphosphine per atom of rhodium.
Claim 2
Dependent Claim
136 words
A rhodium complex in which the rhodium is bound to halogen and a diphosphine of the formula: ##EQU2## in which the phosphinomethyl groups are in the trans-position relative to one another, and the groups R 1 , R 2 , R' 1 and R' 2 , which may be identical or different, each represent straight or branched alkyl of 1 to 8 carbon atoms, cycloalkyl of 5 or 6 ring carbon atoms, or aryl consisting of one or more benzene rings which are bonded to one another by a valency bond or which form with one another an ortho- or peri-condensed system, the said aryl being unsubstituted or substituted by straight or branched alkyl of 1 to 4 carbon atoms, the said complex containing between 0.5 to 2 mols of said diphosphine per atom of rhodium.
Claim 3
Dependent Claim
15 words
A complex according to claim 1 in which the rhodium is also bound to carbonyl.
Claim 4
Dependent Claim
32 words
The rhodium complex according to claim 1 of formula: ##STR12## in which the diphosphine is the dextrorotatory or laevorotatory stereoisomer and the phosphinomethyl groups are in the trans-position relative to one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |