Patent US4524032A successfully refreshed from Google Patents.
US4524032A
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Direct fluorination of etherified or unetherified hydroxy group bearing aromatic compounds
Assignee: Daikin Industries Ltd
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Filing: 1983-01-14
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Granted: 1985-06-18
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Expires: 2003-01-14
Abstract
Abstract A process for direct fluorination of etherified or unetherified hydroxy group-bearing aromatic compounds, which comprises reacting an etherified or unetherified hydroxy group-bearing aromatic compound with fluorine gas to give the corresponding etherified or unetherified hydroxy group and at least one fluorine atom-bearing aromatic compound.
Inventors
- 👤 Susumu Misaki
- 👤 Sadamu Ishii
- 👤 Masahiro Suefuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:52
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/587; C07C49/687; C07B; C07B39/00; C07C37/00; C07C37/62; C07C41/00; C07C41/01; C07C41/18; C07C41/22; C07C45/00; C07C45/51; C07C45/511; C07C45/512; C07C45/61; C07C45/63
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A process for the direct fluorination of hydroxy group-bearing aromatic compounds which comprises reacting a hydroxy group-bearing aromatic compound with fluorine gas in an inert solvent at a temperature of from -40° to 10° C. to give the corresponding product having at least one hydroxy group and at least one fluorine atom thereon.
Claim 2
Dependent Claim
53 words
A process for the direct fluorination of hydroxy group-bearing aromatic compounds which comprises reacting a hydroxy group-bearing aromatic compound with fluorine gas in an inert solvent at a temperature of from -40° to 10° C. to give the corresponding product having at least one hydroxy group and at least one fluorine atom thereon.
Claim 3
Dependent Claim
22 words
The process according to claim 1, wherein the inert solvent is acetonitrile, a glyme or a halogenated hydrocarbon or a mixture thereof.
Claim 4
Dependent Claim
14 words
The process according to claim 2, wherein the glyme is diglyme, triglyme or tetraglyme.
Claim 5
Dependent Claim
25 words
The process according to claim 1, wherein the fluorine gas is diluted with an inert gas prior to reaction with said hydroxy group-bearing aromatic compound.
Claim 6
Dependent Claim
25 words
The process according to claim 1, wherein the aromatic compound reactant is a compound comprising an aromatic ring having at least one hydroxy group thereon.
Claim 7
Dependent Claim
14 words
The process according to claim 5, wherein said aromatic ring is a benzene ring.
Claim 8
Dependent Claim
37 words
The process according to claim 5, wherein the aromatic compound reactant is represented by the formula: ##STR3## wherein R, R' and R" are each hydrogen, halogen, lower alkoxy, hydroxy, nitro, cyano, formyl, phenyl, hydroxyphenyl or lower alkoxyphenyl.
Claim 9
Dependent Claim
37 words
The process according to claim 1, wherein said product is represented by the formula: ##STR4## wherein R, R' and R" are each hydrogen, halogen, lower alkyl, lower alkoxy, hydroxy, nitro, cyano, formyl, phenyl, hydroxyphenyl or lower alkoxyphenyl.
Claim 10
Dependent Claim
49 words
The process according to claim 1, wherein the aromatic compound reactant has at least one open position with no substituent on at least one of the ortho and para positions to said hydroxy group and said product has a fluorine atom on at least one of said open positions.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |