5-Formyl-3-thiophenecarboxylic acid synthesis
- Product Name:5-Formyl-3-thiophenecarboxylic acid
- CAS Number:89324-44-7
- Molecular formula:C6H4O3S
- Molecular Weight:156.16
67808-66-6
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Yield:89324-44-7 632 mg
Reaction Conditions:
with hydrogenchloride;water at 100;
Steps:
44.2 The second step: the preparation of 5-formylthiophene-3-carboxylic acid (44-b)
Dissolve methyl 5-formylthiophene-3-carboxylate (44-a, 700 mg, 4.54 mmol) in hydrochloric acid (6M) (10 mL) at room temperature,After the addition, the reaction solution was stirred at 100° C. for 1 hour, and the reaction solution was concentrated under reduced pressure to obtain 5-formylthiophene-3-carboxylic acid (44-b, 632 mg).
References:
WO2023/20479,2023,A1 Location in patent:Page/Page column 72
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