反应详情

A mixture of 7-[(6-chloropyridin-2-yl)methoxy]-5-[4-(methylsulfonyl)phenoxy]-1H-indole-2-carboxylic acid (780 mg), 1-[3-(dimethylamino)propyl-3-ethylcarbodiimide hydrochloride (632 mg), 1-hydroxybenzotriazole ammonium salt (502 mg) and N,N-dimethylformamide (30 mL) was stirred at room temperature for 15 hr. Water was added to the reaction solution, and the precipitated solid was collected by filtration, and washed successively with water and diethyl ether to give the title compound (680 mg, yield 90%) as a white solid. The obtained crystals were recrystallized from N,N-dimethylformamide-water to give colorless crystals. melting point 259-260° C.

1. filtrationthe precipitated solid was collected by filtration
2. washwashed successively with water and diethyl ether