Method for producing 3-methyl-2-thiophenecarboxylic acid
US8350057B2 · kind B2 · utility
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Key dates
| Filing date | Jun 25, 2009 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Nov 22, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing 3-methyl-2-thiophenecarboxylic acid is provided.A method for producing 3-methyl-2-thiophenecarboxylic acid, which comprises reacting a compound represented by the formula (I):(wherein X is a chlorine atom or a bromine atom) with magnesium in the presence of an alkyl halide to give a Grignard reagent represented by the formula (II):(wherein X is the same as defined above), reacting the Grignard reagent of the formula (II) with carbon dioxide, and acidifying the reaction product.
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