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

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Reaction Steps

7-[[(7R)-8-Cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylic acid 1q (150 mg, 0.34 mmol) and O-(benzotriazol-1-yl)-N,N,N′,N′-tetra methyluronium tetrafluoroborate (110 mg, 0.34 mmol) were dissolved in 30 mL of anhydrous dichloromethane, followed by the addition of diisopropylethylamine (0.1 mL, 0.75 mmol) and (2R)-1-amino-3-(4-methylpiperazin-1-yl)propan-2-ol 20e (59 mg, 0.34 mmol). The reaction solution was stirred for 3 hours. The resulting solution was added with 30 mL of saturated sodium carbonate solution and extracted with dichloromethane (50 mL×3). The combined organic phase was washed with saturated sodium carbonate solution (50 mL×3), water (50 mL) and saturated sodium chloride solution (50 mL) successively, then dried over anhydrous sodium sulfate, filtered and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain the title compound 7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-N-[(2R)-2-hydroxy-3-(4-methylpiperazin-1-yl)propyl]-2,3-dihydrobenzofuran-4-carboxamide 25 (120 mg, yield: 60.0%) as a white solid.

Provenance & Evidence