反应详情

To a solution of tert-butyl 3-(2-(6-bromo-[1,2,4]triazolo[4,3-a]pyridin-3-yl)quinolin-8-yloxy)-2,2-dimethylpropylcarbamate (0.108 g, 0.205 mmol) in 2 mL dichloromethane was added neat TFA (0.395 mL, 5.13 mmol). The reaction mixture was stirred at ambient temperature for 4 hours, after which it was concentrated. The residue was concentrated twice from dichloromethane/hexanes to give solids, which were dried in vacuo. The solids were dissolved in several drops of methanol and minimal dichloromethane, and this solution was added to a vigorously stirring solution of 20 mL ether and 1.5 mL 2M HCl/ether, causing precipitation. The solids were stirred 5 minutes, then isolated by filtration through a medium glass fitted funnel by pushing the solvent through the funnel with nitrogen pressure, rinsed twice with ether, twice with 1:1 dichloromethane:ether, twice with ether, and dried in vacuo to give the title compound (0.042 g, 0.0841 mmol, 41.0% yield) as a pale yellow powder. MS APCI (+) m/z 426/428 (M+1)(Br isotope) detected.

1. concentrationafter which it was concentrated
2. concentrationThe residue was concentrated twice from dichloromethane/hexanes
3. customto give solids, which
4. customwere dried in vacuo
5. dissolutionThe solids were dissolved in several drops of methanol
6. additionminimal dichloromethane, and this solution was added to a vigorously stirring solution of 20 mL ether and 1.5 mL 2M HCl/ether
7. customprecipitation
8. stirringThe solids were stirred 5 minutes
9. customisolated by filtration through a medium glass
10. customfitted funnel
11. washrinsed twice with ether, twice with 1:1 dichloromethane
12. dry with materialether, twice with ether, and dried in vacuo