Patent US5484932A successfully refreshed from Google Patents.
US5484932A
Expired / Lapsed
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Halogenation processes in advantageous solvents, and novel bistrifluoromethyl-polyfluoroalkoxybenzenes
Assignee: Bayer AG
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Filing: 1994-06-02
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Granted: 1996-01-16
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Expires: 2014-06-02
Abstract
Abstract Compounds such as ##STR1## wherein R is F, CF 3 , CF 2 H, CHF CF 3 or CF 2 CF 3 , as well as related compounds containing chlorine, are used as solvents in halogenation processes.
Inventors
- 👤 Albrecht Marhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:50
CPC Classifications
C; C07; C07B; C07B39/00; C07B37/00; C07B37/04; C07C; C07C37/00; C07C37/62; C07C41/00; C07C41/01; C07C41/18; C07C41/22; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C07D; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A process for the chlorination or bromination of a side-chain of an aromatic or heterocyclic compound which comprises reacting said compound with a chlorinating agent or a brominating agent in a solvent comprising one or more compounds of the formula I ##STR6## in which R represents fluorine, chlorine, CF 3 , CF 2 H, CF 2 Cl, CHFCF 3 , CF 2 CF 3 or CFClCF 3 , Hal represents fluorine or chlorine, a represents zero, 1, 2 or 3, b represents zero, 1 or 2, and c represents zero or, in the case Hal=fluorine, can also represent 1, 2 or 3, and, in the case Hal=chlorine, can also represent 1, where a and b do not represent zero simultaneously and the sum a+b+C is at most 6 and wherein the solvent is not itself chlorinated or brominated in the process.
Claim 2
Dependent Claim
141 words
A process for the chlorination or bromination of a side-chain of an aromatic or heterocyclic compound which comprises reacting said compound with a chlorinating agent or a brominating agent in a solvent comprising one or more compounds of the formula I ##STR6## in which R represents fluorine, chlorine, CF 3 , CF 2 H, CF 2 Cl, CHFCF 3 , CF 2 CF 3 or CFClCF 3 , Hal represents fluorine or chlorine, a represents zero, 1, 2 or 3, b represents zero, 1 or 2, and c represents zero or, in the case Hal=fluorine, can also represent 1, 2 or 3, and, in the case Hal=chlorine, can also represent 1, where a and b do not represent zero simultaneously and the sum a+b+C is at most 6 and wherein the solvent is not itself chlorinated or brominated in the process.
Claim 3
Dependent Claim
59 words
The process of claim 1, in which in the formula (I) R represents fluorine, CF 3 , CF 2 H, CHFCF 3 or CF 2 CF 3 , Hal represents fluorine or chlorine, a represents zero, 1 or 2, b represents zero or 1, and c represents zero or 1, where a and b do not represent zero simultaneously.
Claim 4
Dependent Claim
63 words
The process of claim 1, in which in the formula (I), in the case of two CF 3 groups being present, these are in meta positions with regard to one another and, in the case of an OCF 2 -R group and further substituents being present, said further substituents are in meta or para positions with regard to the OCF 2 -R group.
Claim 5
Dependent Claim
24 words
The process of claim 1, in which the halogenating agent used is selected from the group consisting of chlorine, sulphuryl chlorine, bromine and N-bromosuccinimide.
Claim 6
Dependent Claim
30 words
The process of claim 1, in which the compounds of the formula (I) are used in amounts from 5 to 1000% by weight, based on the compound to be halogenated.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-15 | 1999-07-17 | 2000-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-15 | 2003-07-17 | 2004-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-15 | 2007-07-17 | 2008-01-16 | $7700.00 | Window Closed / Lapsed |