Ammonium formate → (R)-1-(4-trifluoromethoxy-benzenesulfonyl)-4-(5-trifluoromethyl-thiazolo[4,5-d]pyrimidin-2-yl)-piperazine-2-carboxylic acid 4-difluoromethoxy-3-fluoro-benzylamide

Participants

Reaction Steps

Under an argon atmosphere, to a solution of the compound (912 mg) obtained in Step 6 and ammonium formate (750 mg) in ethanol (18 ml) was added 10% palladium carbon (912 mg). After stirring under refluxing conditions for 1 hr, the catalyst was filtered off. The filtrate was concentrated under reduced pressure, and the residue was partitioned by adding ethyl acetate and water. The organic layer was washed with water, dried over anhydrous magnesium sulfate, filtrated, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:n-hexane=10:1-1:2) to give the title compound (625 mg).

Provenance & Evidence