Water → 1-(3,4-dichlorobenzyl)-5-methyl-1H-1,2,3-triazole-4-carboxylic acid

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Reaction Steps

To a mixture of methyl 1-[(3,4-dichlorophenyl)methyl]-5-methyl-1H-1,2,3-triazole-4-carboxylate (Intermediate 7) (9 g, 0.03 mol) in methanol (200 mL) was added NaOH (2.4 g) and water. The mixture was stirred overnight. Water was added and the solvent was evaporated. The residue was extracted with DCM (twice). The aqueous phase was adjusted to pH=2 with a 2N HCl solution. The formed precipitate was filtered to give the title compound as a white solid (7.29 g, 84%). LC/MS: m/z 287 (M+H)+, Rt: 2.52 min.

Provenance & Evidence