Azetidine → 4-(azetidine-1-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (2-pyrrolidin-1-yl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-amide

Participants

Reaction Steps

A mixture of 1-methyl-5-(2-(pyrrolidin-1-yl)-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (150 mg, 422 μmol), azetidine (85.4 μl, 1.27 mmol), propylphosphonic anhydride (50% in ethyl acetate, 622 μl, 1.06 mmol) and N,N-diisopropylethylamine (287 μl, 1.69 mmol) in tetrahydrofuran (6 ml) was stirred for 18 hours at 70°. The solvent was evaporated, the residue was triturated with sodium hydrogencarbonate solution. The precipitated solid was filtered off, washed with water and dried affording 4-(azetidine-1-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (2-pyrrolidin-1-yl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-amide (136 mg, 81.7%) as a light brown solid. mp: >250° C., MS: m/z=395.4 (M+H+).

Provenance & Evidence