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

Participants

Reaction Steps

A mixture of 1-methyl-5-(2-morpholin-4-yl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (150 mg, 0.404 mmole), 3-fluoroazetidine hydrochloride (135 mg, 1.21 mmole), N-ethyldiisopropylamine (353 ul, 2.02 mmole) and 1-propanephosphonic acid cyclic anhydride (50% in ethyl acetate, 606 ul, 1.01 mmole) in tetrahydrofurane (7 ml) is stirred for 22 h at room temperature. The solvent is removed under reduced pressure and the residue (994 mg) is triturated for 2 hrs with sat. aqueous sodium bicarbonate solution (30 ml). The solid is collected by filtration, washed with water and dried affording 4-(3-fluoro-azetidine-1-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (2-morpholin-4-yl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-amide (68 mg, 39.3%) as an off-white solid. mp.: 247-250° C. MS: m/z=425.1 (M+H+)

Provenance & Evidence