Claims
- 1. A process for the preparation of 2-methoxy-3,6-dichloro-benzoic acid comprising the steps of catalytically debrominating 2-hydroxy-5-bromo-3,6-dichloro-benzyl alcohol to produce 2-hydroxy-3,6-dichloro-benzyl alcohol, methylating said 2-hydroxy-3,6 -dichloro-benzyl alcohol at the 2-hydroxy group to produce 2-methoxy-3,6-dichloro-benzyl alcohol, oxidizing said 2-methoxy-3,6-dichloro-benzyl alcohol to produce 2-methoxy-3,6-dichloro-benzoic acid, and recovering said 2-methoxy-3,6-dichloro-benzoic acid.
- 2. The process of claim 1, in which said debromination is effected by hydrogenation at normal pressure in the presence of a palladium catalyst.
- 3. The process of claim 1, in which said debromination is effected in a reaction medium comprising a mixture of methanol and water.
- 4. The process of claim 1, in which said oxidation is effected with oxygen in the presence of a catalyst.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2331712 |
Jun 1973 |
DT |
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Parent Case Info
This is a continuation-in-part of copending application Ser. No. 480,685 filed June 19, 1974 now U.S. Pat. No. 3,928,432.
US Referenced Citations (2)
Continuation in Parts (1)
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Number |
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Parent |
480685 |
Jun 1974 |
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