US4068082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing esters
Assignee: Lee Pharmaceuticals Inc
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Filing: 1973-09-19
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Granted: 1978-01-10
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Expires: 1993-09-19
Abstract
Abstract Esters are prepared by reaction of acyl halides and alcohols or hydroxyalkyl esters and acid halides in the presence of a tertiary amine and polar aprotonic solvents. Bis(2-methacrylatoethyl) phthalate is prepared by the reaction of phthaloyl chloride with 2-hydroxyethyl methacrylate in pyridine and acetone. Bis-phenol-A-bis(2-methacrylatoethyl)ether is prepared from 2,2-bis[4-(2-hydroxyethoxy)phenyl]-propane and methacryl chloride in acetone.
Inventors
- 👤 Donald G. Stoffey
- 👤 Jan Alexander Orlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:25
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
In a process for making esters of the formula ##STR11##by the reaction of a compound of the formula R(OH).sub.x with a compound of the formula ##STR12## wherein R and R 1 are each independently alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, or substituted aryl, and X is halogen, and x is a positive integer, in the presence of sufficient tertiary amine as an acceptor for the hydrogen halide generated by the reaction, the improvement which comprises conducting said reaction in a polar aprotonic solvent as the reaction medium, wherein the solvent is comprised of acetone.
Claim 2
Dependent Claim
95 words
In a process for making esters of the formula ##STR11##by the reaction of a compound of the formula R(OH).sub.x with a compound of the formula ##STR12## wherein R and R 1 are each independently alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, or substituted aryl, and X is halogen, and x is a positive integer, in the presence of sufficient tertiary amine as an acceptor for the hydrogen halide generated by the reaction, the improvement which comprises conducting said reaction in a polar aprotonic solvent as the reaction medium, wherein the solvent is comprised of acetone.
Claim 3
Dependent Claim
61 words
In a process for making bis acrylates by the reaction of an acryl halide with a diol, or by the reaction of a hydroxyalkyl acrylate with a dicarboxylic acid halide, in the presence of sufficient tertiary amine as an acceptor for the hydrogen halide generated by the reaction, the improvement which comprises conducting said reaction in acetone as the reaction medium.
Claim 4
Dependent Claim
61 words
In a process for making bis acrylates by the reaction of an acryl halide with a diol, or by the reaction of a hydroxyalkyl acrylate with a dicarboxylic acid halide, in the presence of sufficient tertiary amine as an acceptor for the hydrogen halide generated by the reaction, the improvement which comprises conducting said reaction in acetone as the reaction medium.
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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |