Diisopropylethylamine → HCID 86666019, compound

Participants

Reaction Steps

A mixture of 1-methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (150 mg, 335 μmol), (1S,4S)-2-oxa-5-azabicyclo[2.2.1]heptane hydrochloride (136 mg, 1.00 mmol), propylphosphonic anhydride (50% in ethyl acetate, 493 μl, 837 μmol) and N,N-diisopropylethylamine (398 μl, 2.34 mmol) in tetrahydrofuran (7.00 ml) was refluxed for 2.5 days (weekend). The solvent was evaporated, the residue was triturated with sodium hydrogencarbonate solution. The precipitated solid was filtered off, washed with water and dried affording 2-methyl-4-((1R,4R)-2-oxa-5-aza-bicyclo[2.2.1]heptane-5-carbonyl)-2H-pyrazole-3-carboxylic acid (2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-amide (79 mg, 53.1%) as a white solid. mp: 272-273° C., MS: m/z=445.1 (M+H+)

Provenance & Evidence