US3928419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of resorcylic acid esters
Assignee: International Flavors and Fragrances Inc
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Filing: 1974-04-22
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Granted: 1975-12-23
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Expires: 1994-04-22
Abstract
Abstract WHEREIN R1 represents methyl, R2 represents lower alkyl having from one up to four carbon atoms, R3 is either of hydrogen, methyl or ethyl, R4 and R5 are the same or different C1-C4 lower alkyl and M is an alkali metal at a temperature of from 0*C up to 150*C. WITH AN ALKALI METAL SALT OF A MALONIC ESTER HAVING THE STRUCTURE: A process is described for the preparation of ring-disubstituted resorcyclic acid esters which comprises a single step of reacting an Alpha -substituted- Alpha , Beta unsaturated alkenone having the structure:
Inventors
- 👤 Kenneth K Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:08
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0061; A; A23; A23L; A23L27/00; A23L27/20; A23L27/204
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
A PROCESS FOR PREPARING A C1-C4 ALKYL-3-LOWER ALKYL, 6METHYL RESORCYLATE COMPRISING THE STEP IF INTIMATELY ADMIXING AT A TEMPERATURE OF FROM 0*C UP TO 150:C AN A-ACYLOXY, A,BUNSATURATED ALKENONE HAVING THE STRUCTURE:
Claim 2
Dependent Claim
32 words
A PROCESS FOR PREPARING A C1-C4 ALKYL-3-LOWER ALKYL, 6METHYL RESORCYLATE COMPRISING THE STEP IF INTIMATELY ADMIXING AT A TEMPERATURE OF FROM 0*C UP TO 150:C AN A-ACYLOXY, A,BUNSATURATED ALKENONE HAVING THE STRUCTURE:
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the reaction temperature is from 60*C up to 80*C.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the reaction is carried out in the presence of a solvent selected from the group consisting of dimethyl sulfoxide, dimethyl sulfone, dimethyl formamide, tetrahydrofuran and diethyl ether.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the malonic ester salt is formed by reacting a malonic acid ester corresponding to said malonic ester salt, with a strong base.
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 |