反应详情

Ethyl 3-(2-amino-5-bromopyridin-3-yloxy)-4-chlorobenzoate (9.645 g, 25.95 mmol) and benzoyl isothiocyanate (4.659 g, 28.55 mmol) were placed in THF (250 mL) and the reaction mixture was stirred at room temperature for 18 hours, then heated at 55° C. for two days. THF was removed and the residue was purified by silica gel chromatography (5-25% EtOAc in hexane) to provide ethyl 3-(2-(3-benzoylthioureido)-5-bromopyridin-3-yloxy)-4-chlorobenzoate (7.08 g, 51.0%) as a yellow solid.

1. temperatureheated at 55° C. for two days
2. customTHF was removed
3. customthe residue was purified by silica gel chromatography (5-25% EtOAc in hexane)