Ammonia → 6-chloro-4-(1-methyl-1H-pyrazol-3-ylamino)-pyridazine-3-carboxylic acid amide

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Reaction Steps

6-Chloro-4-(1-methyl-1H-pyrazol-3-ylamino)-pyridazine-3-carboxylic acid methyl ester (75 mg, 0.28 mmol) was suspended in 7M ammonia in methanol (3 mL). After 16 h, the reaction mixture was concentrated in vacuo to give 6-chloro-4-(1-methyl-1H-pyrazol-3-ylamino)-pyridazine-3-carboxylic acid amide (70 mg, 100%) as an off-white solid which was used directly in the next step without purification. 1H NMR (300 MHz, DMSO-d6) δ ppm 11.39 (s, 1H) 8.77 (br. s., 1H) 8.24 (s, 1H) 8.13 (br. s., 1H) 7.72 (d, J=2.3 Hz, 1H) 6.18 (d, J=2.3 Hz, 1H) 3.84 (s, 3H); LCMS (EI/CI) m/z: 253 [M+H].

Provenance & Evidence