反应详情

Triethylamine (0.115 g) and 0.200 g of benzoyl chloride were added to a solution of 0.500 g of N-benzenesulfonyl-4-amino-3-(biphenyl-4-ylmethylamino)benzamide in 5 ml of N,N-dimethylformamide. The mixture was stirred at room temperature for 15 hours. A potassium hydrogencarbonate aqueous solution was added thereto to stop the reaction. The solvent was distilled off under reduced pressure. The residue was dissolved in a mixture of water and methanol, and the solution was adjusted to a pH of from 5 to 6 with 10% hydrochloric acid. The crystals precipitated were collected, and were dried to obtain 0.393 g of crude N-benzenesulfonyl-4-benzoylamino-3-(biphenyl-4-ylmethylamino)benzamide. This crude product was converted to 6-benzenesulfonylcarbamoyl-1-(biphenyl-4-ylmethyl)-2-phenylbenzimidazole [(246), 0.270 g] in the same manner as in Example 183.

1. customthe reaction
2. distillationThe solvent was distilled off under reduced pressure
3. dissolutionThe residue was dissolved in a mixture of water and methanol
4. customThe crystals precipitated
5. customwere collected
6. customwere dried