反应详情

To a solution of tert-butyl 8-bromo-2,3-diphenyl-7,8-dihydropyrido[2,3-b]pyrazine-5(6H)-carboxylate (Intermediate H) (500 mg, 1.072 mmol) in ethanol (10 ml) was added 40% dimethylamine in water (0.407 ml, 3.22 mmol) and the mixture was left to stir under an atmosphere of nitrogen overnight. The solvent was concentrated in vacuo. The crude product was purified by chromatography on silica eluting with EtOAc in iso-hexane to affore the title compound;

1. waitthe mixture was left
2. concentrationThe solvent was concentrated in vacuo
3. customThe crude product was purified by chromatography on silica eluting with EtOAc in iso-hexane