US4267375A
Expired / Lapsed
US
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Preparation of thioethers
Assignee: Chevron Belgium NV
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Filing: 1978-09-25
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Granted: 1981-05-12
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Expires: 1998-09-25
Abstract
Abstract Thioethers may be prepared by reacting a thiol, such as thiophenol, with an alcohol (having electron donor groups in the alpha or beta position to its hydroxyl group) such as phenyl-1-hydroxy-phenethylsulfide. Reaction is carried out in the presence of a Lewis Acid metal halide, typically zinc chloride.
Inventors
- 👤 Alfred G. Maasbol
- 👤 Lothar G. Dulog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A method for the preparation of 1-phenyl-1,2-bis(phenylthio)ethane wherein thiophenol is heated at reflux temperature is benzene with zinc chloride and with an oxygenated aromatic derivative selected from the group consisting of phenyl-1-hydroxyphenethyl sulphide, phenyl-2-hydroxyphenethyl sulphide and styrene oxide for a period of time sufficient to form 1-phenyl-1,2-bis(phenylthio)ethane, and 1-phenyl-1,2-bis(phenylthio)ethane is separated.
Claim 2
Independent Claim
51 words
A method for the preparation of 1-phenyl-1,2-bis(phenylthio)ethane wherein thiophenol is heated at reflux temperature is benzene with zinc chloride and with an oxygenated aromatic derivative selected from the group consisting of phenyl-1-hydroxyphenethyl sulphide, phenyl-2-hydroxyphenethyl sulphide and styrene oxide for a period of time sufficient to form 1-phenyl-1,2-bis(phenylthio)ethane, and 1-phenyl-1,2-bis(phenylthio)ethane is separated.
Claim 3
Independent Claim
23 words
A method for the preparation of 1-phenyl-1,2-bis(phenylthio)ethane which comprises heating thiophenol at reflux temperature in benzene with zinc chloride and with phenyl-1-hydroxy-phenethyl sulfide.
Claim 4
Independent Claim
23 words
A method for the preparation of 1-phenyl-1,2-bis(phenylthio)ethane which comprises heating thiophenol at reflux temperature in benzene with zinc chloride and with phenyl-1-hydroxy-phenethyl sulfide.
Claim 5
Independent Claim
23 words
A method for the preparation of 1-phenyl-1,2-bis(phenylthio)ethane which comprises heating thiophenol at reflux temperature in benzene with zinc chloride and with phenyl-2-hydroxy-phenethyl sulfide.
Claim 6
Independent Claim
23 words
A method for the preparation of 1-phenyl-1,2-bis(phenylthio)ethane which comprises heating thiophenol at reflux temperature in benzene with zinc chloride and with phenyl-2-hydroxy-phenethyl sulfide.
References Cited (Backward Citations)
US2745878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |