US3974205A
Expired / Lapsed
US
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Tetrachloroethyl esters of unsaturated organic acids and the method for their preparation
Assignee: Czech Academy of Sciences
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Filing: 1973-12-21
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Granted: 1976-08-10
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Expires: 1993-12-21
Abstract
Abstract The invention relates to tetrachloroethyl esters of unsaturated organic acids of the general formula I ##EQU1## WHERE X stands for a substituent selected from the group consisting of COOH, COOCH 3 , COOC 2 H 5 , ##EQU2## It further relates to their polymers and mixed polymers of the above monomers, namely with vinyl and diene compounds, and to methods for preparation both monomers and these polymers. To prepare the compounds of the general formula I, acyl chloride of the general formula II ##EQU3## where Y stands for a substituent selected from the group consisting of COOH, COOCH 3 , COOC 2 H 5 , ##EQU4## is treated with chloral, advantageously in the presence of a mineral acid or salt, for example with addition of sulfuric acid and ferric chloride, respectively.
Inventors
- 👤 Frantisek Hrabak
- 👤 Milan Bezdek
- 👤 Karel Bouchal
- 👤 Jan Lokaj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:53
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
A tetrachloroethyl ester of an unsaturated organic acid of the formula I ##EQU5## wherein X is a substituent selected from the group consisting of COOH, COOCH 3 , COOC 2 H 5 , ##EQU6##
Claim 2
Dependent Claim
34 words
A tetrachloroethyl ester of an unsaturated organic acid of the formula I ##EQU5## wherein X is a substituent selected from the group consisting of COOH, COOCH 3 , COOC 2 H 5 , ##EQU6##
Claim 3
Dependent Claim
15 words
A tetrachloroethyl ester of an unsaturated organic acid according to claim 1 designated bis-(1,2,2,2-tetrachloroethyl) fumarate.
Claim 4
Dependent Claim
15 words
A tetrachloroethyl ester of an unsaturated organic acid according to claim 1 designated bis-(1,2,2,2-tetrachloroethyl) muconate.
Claim 5
Dependent Claim
16 words
A tetrachloroethyl ester of an unsaturated organic acid according to claim 1 designated 1,2,2-tetrachloroethyl fumarate monochloride.
Claim 6
Independent Claim
81 words
A method of producing a 1,2,2,2-tetrachloroethyl ester of an unsaturated dicarboxylic acid monochloride having the formula III ##STR6## where Z is COCl or CH=CH--COCl, comprising the step of heating the bis-(1,2,2,2-tetrachloroethyl) ester of the formula ##STR7## wherein n is 1 or 2, in the presence of 0.1 to 5% of ferric chloride for a period of time sufficient to form a 1,2,2,2,-tetrachloroethyl ester of the formula III ad thereafter isolating said ester from the reaction mixture by fractional distillation or crystallization.
Claim 7
Independent Claim
81 words
A method of producing a 1,2,2,2-tetrachloroethyl ester of an unsaturated dicarboxylic acid monochloride having the formula III ##STR6## where Z is COCl or CH=CH--COCl, comprising the step of heating the bis-(1,2,2,2-tetrachloroethyl) ester of the formula ##STR7## wherein n is 1 or 2, in the presence of 0.1 to 5% of ferric chloride for a period of time sufficient to form a 1,2,2,2,-tetrachloroethyl ester of the formula III ad thereafter isolating said ester from the reaction mixture by fractional distillation or crystallization.
Claim 8
Dependent Claim
14 words
The method according to claim 5 wherein said ester is isolated by fractional distillation.
Claim 9
Dependent Claim
13 words
The method according to claim 5, wherein said ester is isolated by crystallization.
References Cited (Backward Citations)
DE2252908A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |