HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2391972Generated: October 29, 2026
Sodium Hydroxide → 5-chloro-4-(1-methyl-1H-pyrazol-5-yl)thiophene-2-carboxylic acid
https://huagongshe.com/reaction/2391972
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Sodium Hydroxide | HCID 14798 | — |
| Reactant | Methyl 5-chloro-4-(1-methyl-1H-pyrazol-5-yl)thiophene-2-carboxylate | HCID 57826577 | — |
| Solvent | Methanol | HCID 887 | — |
| Solvent | Tetrahydrofuran | HCID 8028 | — |
| Product | 5-chloro-4-(1-methyl-1H-pyrazol-5-yl)thiophene-2-carboxylic acid | HCID 57826389 | — |
Reaction Steps
To a solution of methyl 5-chloro-4-(1-methyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate (0.30 g, 1.17 mmole) in THF (10 mL) and MeOH (10 mL) was added 6N NaOH (5 mL). The reaction solution was heated to 50° C. for 2 hrs. The reaction solution was concentrated under vacuum, made acidic (pH ˜2) with 3N HCl, and extracted with DCM. The organic solution was dried (Na2SO4) and concentrated to a solid (0.22 g) which was used without further purification. LC-MS (ES) m/z=243 (M+H)+.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US08273782B2 |
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| Source dataset | uspto-grants-2012_09 |
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| ORD ID | ord-fe1d0fe40d03431a94ba4b85b28fc558 |
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| Source note | uspto-grants-2012_09 |
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