Claims
- 1. A process for the isomerization of ortho- and para-bromo phenols or the ethers thereof into corresponding meta-brominated derivatives, comprising isomerizing the ortho- or para-brominated phenols or ethers in the presence of a liquid superacidic medium having a H.sub.0 acidity estimated on the Hammett logarithmic scale of greater than -11 up to about 31 25 at elevated temperatures to effect isomerization of the ortho- and para-bromophenols or the corresponding ethers to the meta-brominated derivatives.
- 2. The process according to claim 1 in which the temperature is ambient temperature.
- 3. The process according to claims 1 or 2 in which the liquid superacidic medium is fluoroantimonic acid HF--SbF.sub.5.
- 4. The process according to claims 1 or 2 in which the liquid superacidic medium is a complex of hydrofluoric acid and boron trifluoride HF--BF3.
- 5. The process according to claim 1 in which the liquid superacidic medium is magic acid FSO.sub.3 H--SbF.sub.5.
- 6. The process according to claim 1 in which the liquid superacidic medium is a complex of trifluoromethanesulfonic acid and antimony pentafluoride.
Priority Claims (1)
Number |
Date |
Country |
Kind |
80 12262 |
Jun 1980 |
FRX |
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Parent Case Info
This is a continuation of application Ser. No. 267,415, filed May 26, 1981, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3681467 |
O'Bara |
Aug 1972 |
|
4138411 |
Gandihon |
Feb 1979 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
784782 |
May 1968 |
CAX |
Non-Patent Literature Citations (2)
Entry |
Jacquesy et al., "J.C.S. Chem. Comm." (1980) p. 100-111. |
Fury et al., "J. Org. Chem." (Jul. 1965) vol. 30, pp. 2301-2304. |
Continuations (1)
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Number |
Date |
Country |
Parent |
267415 |
May 1981 |
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