Trityl chloride → N-[3-(1-methyl-5-triphenylmethylaminopyrazol-4-yl)propyl]formamide

Participants

Reaction Steps

To a solution of N-[3-(5-amino-1-methylpyrazol-4-yl)propyl]formamide (3.64 g, 20 mmol) and triethylamine (2.23 g, 22 mmol) in methylene chloride (50 ml) was added triphenylmethyl chloride (6.13 g, 22 mmol). The mixture was stirred at room temperature for 90 minutes. The reaction mixture was washed with successively 10% aqueous citric acid solution, brine, and 10% aqueous sodium carbonate solution. The organic layer was dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was triturated with ethyl acetate and dried in vacuo to give N-[3-(1-methyl-5-triphenylmethylaminopyrazol-4-yl)propyl]formamide (6.8 g) as a solid.

Provenance & Evidence