反应详情

PPA (0.223 mL, 50% in EtOAc, ˜0.38 mmol) is slowly added to a mixture of 2-{2,6-dichloro-3-[(2,2-dimethyl-propionylamino)-methyl]-phenylamino}-6-(2,2-difluoro-ethoxy)-1H-benzimidazole-5-carboxylic acid (0.150 g, 0.291 mmol), 4-bromoaniline (50 mg, 0.291 mmol), TEA (0.101 mL, 0.728 mmol) and THF (10 mL). The mixture is refluxed for 3 d, concentrated and purified via prep. HPLC (column: Zorbax stable bond C18, 5 μm, 30×100 mm, gradient: water+0.15% HCOOH/MeOH 95:5→10:90) to furnish the title compound.

1. temperatureThe mixture is refluxed for 3 d
2. concentrationconcentrated
3. custompurified via prep