1,2-Dichloroethane → HCID 178499178, compound

Participants

Reaction Steps

To a solution of EDC (11.59 g, 60.7 mmol), HOBt (8.19 g, 60.7 mmol) and 4-amino-1H-pyrazole-3-carboxylic acid methyl ester (7.84 g, 55.6 mmol) in DMF (100 ml) was added 5-tert-butyl-2-methoxy-benzoic acid (10.52 g, 50.6 mmol) and the mixture stirred at room temperature overnight. The mixture was reduced in vacuo and the residue partitioned between EtOAc (500 ml) and brine (200 ml), the organic portion was washed with saturated aqueous sodium hydrogen carbonate (200 ml), dried (MgSO4) and reduced in vacuo to yield 4-(5-tert-butyl-2-methoxy-benzoylamino)-1H-pyrazole-3-carboxylic acid methyl ester as a pale yellow solid (17.07 g, 93%). (LC/MS (acidic method): Rt 3.12 min, [M+H]+ 332).

Provenance & Evidence