Diisopropylethylamine → N-(2-(dimethylamino)-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-4-(3-fluoroazetidine-1-carbonyl)-1-methyl-1H-pyrazole-5-carboxamide

Participants

Reaction Steps

A mixture of 5-(2-(dimethylamino)-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1-methyl-1H-pyrazole-4-carboxylic acid (150 mg, 455 μmol), 3-fluoroazetidine hydrochloride (152 mg, 1.37 mmol), propylphosphonic anhydride (50% in ethyl acetate, 671 μl, 1.14 mmol) and diisopropylethylamine (398 μl, 2.28 mmol) in tetrahydrofurane (8 ml) is stirred for 18 hours at room temperature under nitrogen atmosphere. The solvent is evaporated and the residue triturated with sat. aqueous sodium hydrogencarbonate solution; the precipitated solid is collected by filtration, washed with water and dried affording N-(2-(dimethylamino)-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-4-(3-fluoroazetidine-1-carbonyl)-1-methyl-1H-pyrazole-5-carboxamide (158 mg, 89.8%) as a white solid. Mp.: 243-4° C. MS: m/z=387.2 (M+H+).

Provenance & Evidence