US4327235A
Expired / Lapsed
US
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Method for preferential hydrogenation of terminal methylene group in compound possessing terminal methylene group
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1980-12-16
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Granted: 1982-04-27
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Expires: 2000-12-16
Abstract
Abstract In an organic compound having a methlene group attached to a tertiary carbon atom thereof, preferential hydrogenation of the methylene group of the compound is effected by bringing hydrogen into contact with the compound in the presence of a nickel boride colloid.
Inventors
- 👤 Yukimichi Nakao
- 👤 Shoei Fujishige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:01
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C2521/00; C07C2521/02; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A method for preferential hydrogenation of a methylene group in an organic compound containing a group represented by the general formula: ##STR2## wherein, R is one member selected from the group consisting of alkyl groups and aryl groups and C to which R and CH 2 are attached is a tertiary carbon atom, which method comprises exposing the organic compound to hydrogen in an alcohol solution containing a nickel boride colloid.
Claim 2
Independent Claim
71 words
A method for preferential hydrogenation of a methylene group in an organic compound containing a group represented by the general formula: ##STR2## wherein, R is one member selected from the group consisting of alkyl groups and aryl groups and C to which R and CH 2 are attached is a tertiary carbon atom, which method comprises exposing the organic compound to hydrogen in an alcohol solution containing a nickel boride colloid.
Claim 3
Dependent Claim
15 words
The method according to claim 1, wherein the pressure of hydrogen is about one atmosphere.
Claim 4
Dependent Claim
22 words
The method according to claim 1, wherein the temperature of hydrogen is within the range of from 10° C. to 50° C.
Claim 5
Dependent Claim
37 words
The method according to claim 1, wherein the nickel boride colloid is present in the amount of from 1 to 1000 m.mol per mol of the organic compound containing the group represented by the general formula ##STR3##
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |