Triethylamine → 2-[(R)-4-(6-Chloro-4,5-dimethyl-pyridazin-3-yl)-2-methyl-piperazin-1-yl]-4-trifluoromethyl-pyrimidine-5-carboxylic acid methyl ester

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Reaction Steps

Triethylamine (2.0 mL, 14.4 mmol, 2.9 eq) is added to a solution of 2-chloro-4-trifluoromethyl-pyrimidine-5-carboxylic acid methyl ester (1.25 g, 5.0 mmol, 1 eq), 3-chloro-4,5-dimethyl-6-((R)-3-methyl-piperazin-1-yl)-pyridazine (1.20 g, 5.0 mmol, 1 eq) in dichloromethane (40 mL) and the resulting solution is stirred at rt for 2 h. The reaction mixture is diluted with dichloromethane (50 mL) and washed with water (25 mL), then brine (25 mL). The organic layer is separated, dried over sodium sulfate and concentrated under reduced pressure to a white residue. The desired compound is isolated by silica gel chromatography (10-75% EtOAc/heptane) as a white solid (1.83 g, 82%).

Provenance & Evidence