US3966825A
Expired / Lapsed
US
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Process for preparing β-nitroethanethiol
Assignee: Syntex USA LLC
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Filing: 1975-06-30
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Granted: 1976-06-29
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Expires: 1995-06-30
Abstract
Abstract β-Nitroethanethiol is prepared by reacting a carboxylic acid ester of β-nitroethananol with trisodium thiophosphate and hydrolyzing the reasulting thiophosphate ester to form β-nitroethanethiol.
Inventors
- 👤 Michael Marx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:45
CPC Classifications
C; C07; C07C; C07C323/00; C07C201/00; C07C201/06; C07C201/12; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
The process for preparing β-nitroethanethiol which comprises reacting a carboxylic acid ester of β-nitroethanol with trisodium thiophosphate followed by acid hydrolysis of the resulting phosphate ester of β-nitroethanethiol.
Claim 2
Dependent Claim
28 words
The process for preparing β-nitroethanethiol which comprises reacting a carboxylic acid ester of β-nitroethanol with trisodium thiophosphate followed by acid hydrolysis of the resulting phosphate ester of β-nitroethanethiol.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said carboxylic acid ester is β-nitroethyl acetate.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein the reaction takes place in an aqueous medium.
Claim 5
Dependent Claim
14 words
The process of claim 3 wherein a suitable surfactant is added to the water.
Claim 6
Dependent Claim
19 words
The process of claim 4 wherein said surfactant is chosen from the group comprising benzyltriethylammonium chloride and cetyltriethylammonium chloride.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein said carboxylic acid ester is prepared by acylating β-nitroethanol.
Claim 8
Dependent Claim
16 words
The process of claim 6 wherein said ester is prepared by reacting β-nitroethanol with acetic acid.
Claim 9
Dependent Claim
39 words
The process for preparing nitroethanethiol which comprises a. reacting acetic acid and β-nitroethanol to form β-nitroethyl acetate; b. reacting β-nitroethyl acetate with trisodium thiophosphate; and c. effecting hydrolysis of the resulting phosphate ester under acid conditions to form β-nitroethanethiol.
Claim 10
Dependent Claim
39 words
The process for preparing nitroethanethiol which comprises a. reacting acetic acid and β-nitroethanol to form β-nitroethyl acetate; b. reacting β-nitroethyl acetate with trisodium thiophosphate; and c. effecting hydrolysis of the resulting phosphate ester under acid conditions to form β-nitroethanethiol.
References Cited (Backward Citations)
US2351763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |