Dimethylformamide → N-{3-[(Pyridin-3-yl)oxy]phenyl}-1H-benzimidazole-2-carboxamide

Participants

Reaction Steps

0.064 mmol of benzimidazolecarboxylic acid 4l was dissolved in DMF together with 0.064 mmol of the amine 5d, a solution of TBTU (0.096 mmol) in DMF, HOBT (0.026 mmol) in DMF and 0.32 mmol of DIPEA were added successively, and the mixture was stirred at room temperature. After 2.5 hours, 0.2 eq. of acid was added, and the mixture was stirred overnight. After further addition of 0.2 eq. of acid, the reaction mixture was diluted with water after 3 hours, and the resulting precipitate was filtered off with suction, washed with water and digested with diethyl ether.

Provenance & Evidence