Ethyl Acetate → 2,6-difluoro-N-[5-(5-methoxy-2-trifluoromethyl-benzoimidazol-1-yl)-pyrazin-2-yl]-benzamide

Participants

Reaction Conditions

Reaction Steps

Into a 50 mL round bottom flask, was placed 5-(5-methoxy-2-trifluoromethyl-benzoimidazol-1-yl)-pyrazin-2-ylamine (v) (30 mg, 0.10 mmol). To this was added 2,6-difluorobenzoic acid (30 mg, 0.19 mmol), 1-ethyl-3-[3-dimethylaminopropyl]-carbodiimide (EDC) (100 mg, 0.52 mmol) and N,N-dimethylamino-pyridine (DMAP) (70 mg, 0.57 mmol) followed by CHCl3 (10 mL). The resulting solution was stirred at 55° C. overnight. The reaction progress was monitored by TLC (EtOAc/PE=1:2). After completion, the resultant solution was diluted with 20 mL of CHCl3, washed with 20 mL of H2O and dried over Na2SO4. After removal of the solvent and volatile components under reduced pressure, the residue was purified by eluting through a silica gel column with a 1:5 EtOAc/PE solvent system. This resulted in 20 mg (46%) of 2,6-difluoro-N-[5-(5-methoxy-2-trifluoromethyl-benzoimidazol-1-yl)-pyrazin-2-yl]-benzamide (Compound 1) as a white solid.

Provenance & Evidence