反应详情

To a solution of tert-butyl 5-(6-acetoxy-2-(3-aminophenyl)quinazolin-4-ylamino)-1H-indazole-1-carboxylate (0.57 g, 1.12 mmol) and DIEA (0.65 g, 5.03 mmol) in dichloromethane (20 mL) was added butryl chloride (0.180 g, 1.69 mmol). The resulting reaction mixture was stirred at room temperature for 4 h. The volatiles were removed under reduced pressure and the residue was triturated with water causing formation of a precipitate. The solid was collected via filtration and dried under vacuum. The solid was suspended in anhydrous methanol (50 mL) and 28% ammonium hydroxide (0.9 mL) was added. The resulting reaction mixture was stirred at room temperature for 24 h. The volatiles were removed under reduced pressure and the residue upon trituration with ether gave tert-butyl 5-(2-(3-butyramidophenyl)-6-hydroxyquinazolin-4-ylamino)-1H-indazole-1-carboxylate (0.354 g, 0.66 mmol, 59% over two steps). HPLC retention time 6.342 min.

1. customThe resulting reaction mixture
2. customThe volatiles were removed under reduced pressure
3. customthe residue was triturated with water causing formation of a precipitate
4. filtrationThe solid was collected via filtration
5. customdried under vacuum
6. addition28% ammonium hydroxide (0.9 mL) was added
7. customThe resulting reaction mixture
8. stirringwas stirred at room temperature for 24 h
9. customThe volatiles were removed under reduced pressure