US3687990A
Expired / Lapsed
US
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Isoprenoid compounds and a process for producing the same
Assignee: F Hoffmann La Roche AG
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Filing: 1969-07-01
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Granted: 1972-08-29
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Expires: 1989-07-01
Abstract
Abstract Aliphatic isoprenoid compounds having two terminal ether linkages and compounds produced by hydrolysis, acylation, hydrogenation, and oxidation of said isoprenoid compounds including processes for producing these compounds. The isoprenoid compound is produced by reacting an ether of 3-methyl-pent-3-en1-yne with an alkyl ether of 2-methyl-acrolein. These compounds are intermediates in the production of C20 dialdehyde pigments.
Inventors
- 👤 Hugo Gutmann
- 👤 Roman Marbet
- 👤 Ulrich Schwieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:25
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C67/00; C07C67/14; C07C67/28; C07C67/283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A process for the manufacture of an isoprenoid compound of the formula comprising (1) condensing in a solvent an ether compound of the formula: wherein R1 represents an alkyl radical; R2 and R3 represent a radical selected from the group consisting of hydrogen and alkyl; and R1 and R3, taken together, represent a trimethylene bridge with an aldehyde of the formula: wherein R4 represents an alkoxy radical in the presence of an amide selected from the group consisting of alkali metal amides and alkaline earth metal amides to produce an isoprenoid compound having an acetylene linkage; (2) treating said isoprenoid compound with a mineral acid to hydrolyze said isoprenoid compound; (3) treating said isoprenoid compound with an acylating agent; and (4) treating said acylated isoprenoid compound with an oxidizing agent to oxidize said acylated isoprenoid compound with the concomitant saponification of the acyl group.
Claim 2
Dependent Claim
4 words
The compound 2,6-dimethyl-8-hydroxyocta-2,6-dien-4-yn-1-oic acid.
References Cited (Backward Citations)
US3489806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |