Methanol → HCID 178498883, compound

Participants

Reaction Steps

To a solution of 3-methyl-1H-pyrazole-4-carboxylic acid (1.26 g, 10 mmol) in methanol (100 mL) was added thionyl chloride (5.73 g, 45 mmol) at 0° C. The mixture was stirred for 12 hours. The solvent was evaporated in vacuo. To the residue, saturated sodium bicarbonate aqueous solution was added and the mixture was extracted with ethyl acetate (100 mL×3), the organic phase was dried by sodium sulfate. The mixture was filtered and the filtrate was concentrated in vacuo to give methyl 3-methyl-1H-pyrazole-4-carboxylate (0.8 g, 57%). 1H NMR (300 MHz, CDCl1): δ 7.87 (s, 1H), 3.84 (s, 3H), 2.53 (s, 3H).

Provenance & Evidence