Ethyl Acetate → HCID 86654955, compound

Participants

Reaction Steps

To a solution of 3-(1-tert-butoxycarbonyl-2,4-dioxo-1,2-dihydro-4H-thieno[3,4-d]pyrimidin-3-yl)-5-trifluoromethyl-1H-indole-2-carboxylic acid tert-butyl ester 51 (30 mg, 0.054 mmol) in anhydrous THF (1 mL) and anhydrous DMF (1 mL) was added potassium tert-butoxide (9 mg, 0.080 mmol) and 2,5-difluorobenzyl bromide 5J (14.6 mg, 0.071 mmol). The reaction mixture was stirred at room temperature for 3 hours. Ethyl acetate (50 mL) was added and the organic layer was washed with saturated ammonium chloride solution and brine. The organic layer was dried over sodium sulfate. The organic solvent was removed under reduced pressure to provide 3-(1-tert-butoxycarbonyl-2,4-dioxo-1,2-dihydro-4H-thieno[3,4-d]pyrimidin-3-yl)-1-(2,5-difluorobenzyl)-5-trifluoromethyl-1H-indole-2-carboxylic acid tert-butyl ester 5K which was used in the next step without further purification.

Provenance & Evidence