Sodium Carbonate → 7-[[(7S)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-N-(1-methyl-4-piperidyl)-2,3-dihydrobenzofuran-4-carboxamide

Participants

Reaction Steps

7-[[(7S)-8-Cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylic acid 41g (150 mg, 0.34 mmol) and O-(benzotriazol-1-yl)-N,N,N′,N′-tetra methyluronium tetrafluoroborate (111 mg, 0.34 mmol) were dissolved in 30 mL of dichloromethane followed by the addition of diisopropylethylamine (0.13 mL, 0.76 mmol), stirred for 10 minute, then added with 1-methyl-piperidyl-4-yl-amine (40 mg, 0.34 mmol), stirred at room temperature for 1 hour. The reaction mixture was added with 20 mL of saturated sodium carbonate solution and extracted with dichloromethane (100 mL×2). The combined organic phase was washed with water (20 mL) and saturated sodium chloride solution (20 mL) successively, then dried over anhydrous magnesium sulfate, filtered and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with elution system A to obtain the title compound 7-[[(7S)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-N-(1-methyl-4-piperidyl)-2,3-dihydrobenzofuran-4-carboxamide 41 (120 mg, yield: 65.0%) as a white solid.

Provenance & Evidence