Sodium hydride → Ethyl 8-(3,4-difluorobenzyl)-3-[3-methoxy-4-(2-methyl-1,3-oxazol-5-yl)phenyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridine-8-carboxylate

Participants

Reaction Steps

Ethyl 3-[3-methoxy-4-(2-methyl-1,3-oxazol-5-yl)phenyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridine-8-carboxylate (3.00 g) was added to a suspension of sodium hydride (60%, 340 mg) in DMF (5 mL) under ice-cooling. The reaction mixture was stirred for 30 min under ice-cooling, 3,4-difluorobenzyl bromide (1.53 g) was added under ice-cooling, and the mixture was stirred for 1 hr under ice-cooling. The reaction mixture was diluted with ethyl acetate, the mixture was washed with saturated aqueous ammonium chloride solution and saturated brine, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (methanol/ethyl acetate) to give the title compound (3.47 g).

Provenance & Evidence