US3928400A
Expired / Lapsed
US
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Process for producing vitamin A
Assignee: F Hoffmann La Roche AG
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Filing: 1974-04-26
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Granted: 1975-12-23
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Expires: 1994-04-26
Abstract
Abstract A process for producing vitamin A esters, vitamin A aldehyde and vitamin A acid esters from esters of 3,7-dimethyl-9-(1-hydroxy2,2,6-trimethylcyclohexyl)-nona-2,4,6-trien-8-yn-1 -ol and 3,7dimethyl-9-(1-hydroxy-2,2,6-trimethylcyclohexyl)-nona-2,4,6trien-8-ynoic acid including intermediates in this process.
Inventors
- 👤 Gary Lee Olson
- 👤 Gabriel Saucy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:39
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/14; C11; C11C; C11C3/00; C07C403/16; C07C403/24; C07C69/00; C07C69/608; C11C3/02; C07B; C07B2200/00; C07B2200/07; C07B2200/09; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
14 words
A PROCESS FOR PRODUCING AN ALL TRANS ISOMER OF A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
14 words
A PROCESS FOR PRODUCING AN ALL TRANS ISOMER OF A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said compound is treated with an organic amine base.
Claim 4
Dependent Claim
11 words
The process of claim 2 wherein said base is piperidine acetate.
Claim 5
Dependent Claim
9 words
A PROCESS FOR PRODUCING A COMPOUND OF THE FORMULA:
Claim 6
Dependent Claim
9 words
A PROCESS FOR PRODUCING A COMPOUND OF THE FORMULA:
Claim 7
Dependent Claim
11 words
The process of claim 4 wherein said catalyst is tris-(triphenyl-siloxy)-vanadium oxide.
Claim 8
Dependent Claim
50 words
The process of claim 4 wherein treating is carried out in the presence of at least 0.01 mole % based upon the moles of the compound to be treated of a silanol of the formula: (R4)3-Si-OH wherein R4, is lower alkyl, cycloalkyl, aryl, aryl lower alkyl, or cycloalkyl substituted alkyl.
Claim 9
Dependent Claim
17 words
The process of claim 6 wherein said silanol is triphenyl silanol and said catalyst is tri-(triphenylsiloxy)-vanadium oxide.
Claim 10
Dependent Claim
5 words
A compound of the formula:
Claim 11
Dependent Claim
5 words
A compound of the formula:
Claim 12
Dependent Claim
11 words
The compound of claim 8 wherein said compound is ethyl 3,7-dimethyl-8-keto-9-(2,6,6-trimethylcyclohexen-1-yl)-nona-2,4,6-trienoate.
Claim 13
Dependent Claim
13 words
The compound of claim 9 wherein said compound is the all trans isomer.
Claim 14
Dependent Claim
5 words
A compound of the formula:
Claim 15
Dependent Claim
5 words
A compound of the formula:
Claim 16
Dependent Claim
11 words
The compound of claim 11 wherein said compound is 1-acetoxy-3,7-dimethyl-8-keto-9-(2,6,6-trimethylcyclohexen-1-yl)-nona-2,4,6 -triene.
Claim 17
Dependent Claim
13 words
The compound of claim 12 wherein said compound is the all trans isomer.
Claim 18
Dependent Claim
11 words
The compound of claim 11 wherein said compound is 1-palmitoyloxy-3,7-dimethyl-8-keto-9-(2,6,6-trimethylcyclohexen-1-yl)-nona -2,4,6-triene.
Claim 19
Dependent Claim
13 words
The compound of claim 14 wherein said compound is the all trans isomer.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |