US3607991A
Expired / Lapsed
US
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Process for preparing phosphate esters
Assignee: Kerr McGee Corp
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Filing: 1968-03-21
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Granted: 1971-09-21
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Expires: 1988-03-21
Abstract
Abstract A process for preparing phosphorothioate and phosphorodithioate esters by reacting a Chloro-0, 0-dialkylphosphorothioate 0dialkylphosphorothioate with an alkali metal salt of an organic compound which has a pKa value of from about 7 to 12, in the presence of a trimethylamine catalyst. The use of trimethylamine as the catalyst for the reaction enables the reaction to be carried out at relatively low temperatures, that is, between about 0* and 80* C., with the reaction being completed in a relatively short period of time.
Inventors
- 👤 Willard D Peterson
- 👤 Gilbert L Dupertuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
The process as defined in claim 1 in which said trimethylamine is present in the reaction mixture in an amount ranging from about 0.02 to 5 moles per mole of said chloro-O,O-dialkylphosphorothioate
Claim 2
Dependent Claim
22 words
The process as defined in claim 1 in which the trimethylamine catalyst is introduced into the reaction mixture in an aqueous solution.
Claim 3
Dependent Claim
52 words
The process as defined in claim 1 in which the alkali metal salt of said organic compound is the sodium salt of a substituted phenol and said reaction mixture is provided by admixing a water-immiscible organic phase containing said chloro-O,O-dialkylphosphorothioate with an aqueous phase containing said sodium salt of the substituted phenate.
Claim 4
Dependent Claim
13 words
The process as defined in claim 1 in which said chloro-O,O-dialkylphosphorothioate is chloro-O,O-diethylphosphorothioate.
Claim 5
Dependent Claim
19 words
The process as defined in claim 1 in which said reaction mixture is acidified upon completion of said reaction.
Claim 6
Dependent Claim
45 words
The process as defined in claim 1 in which said chloro-O,O-dialkylphosphorothioate is chloro-O,O-diethylphosphorothioate, said alkali metal salt of an organic compound is the sodium salt of a substituted phenol and said reaction is carried out at a temperature of between about 10* and 45* C.
Claim 7
Dependent Claim
34 words
The process as defined in claim 7 in which said reaction mixture is provided by admixing said chloro-O,O-diethylphosphorothioate with an aqueous phase containing said sodium salt of a substituted phenol and said trimethylamine catalyst.
Claim 8
Dependent Claim
43 words
The process as defined in claim 7 in which said reaction mixture is provided by admixing said sodium salt of a substituted phenol with a water-immiscible organic phase comprising said chloro-O,O-diethylphosphorothioate in an organic solvent therefor in the presence of said trimethylamine catalyst.
Claim 9
Dependent Claim
43 words
The process as defined in claim 7 in which said reaction mixture is provided by admixing an organic phase comprising said chloro-O,O-diethylphosphorothioate in an organic solvent therefor with an aqueous phase comprising said sodium salt of a substituted phenol and said trimethylamine catalyst.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |