反应详情

To tert-butyl [3-({2-[(cyclopropylcarbonyl)amino][1,3]thiazolo[5,4-b]pyridin-5-yl}oxy)-4-methylphenyl]carbamate (0.80 g, 1.82 mmol) produced in Example C46(v) were added anisole (0.5 mL) and trifluoroacetic acid (5.0 mL) at 4° C. to give a solution, and the solution was stirred at the same temperature for 2 hr. The reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogen carbonate solution (80 mL) was added to the obtained oily residue, and the mixture was extracted with ethyl acetate (80 mL)/tetrahydrofuran (8 mL). The organic layer was washed with saturated brine (80 mL), and dried over anhydrous sodium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by basic silica gel column chromatography (ethyl acetate), and the obtained solution was concentrated under reduced pressure. The residue was triturated with hexane to give the title compound (525 mg, 85%) as a colorless powder.

1. customto give a solution
2. concentrationThe reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogen carbonate solution (80 mL)
3. additionwas added to the obtained oily residue
4. extractionthe mixture was extracted with ethyl acetate (80 mL)/tetrahydrofuran (8 mL)
5. washThe organic layer was washed with saturated brine (80 mL)
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationThe insoluble material was filtered off
8. concentrationthe filtrate was concentrated under reduced pressure
9. customThe obtained residue was purified by basic silica gel column chromatography (ethyl acetate)
10. concentrationthe obtained solution was concentrated under reduced pressure
11. customThe residue was triturated with hexane