反应详情

To a solution of 1,1-dimethylethyl (2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)(1-{2-[7-(methyloxy)-2-oxo-1(2H)-quinolinyl]ethyl}-4-piperidinyl)carbamate (92 mg) in chloroform (1.5 ml) was added 4N HCl in 1,4-dioxane (1.5 ml) and the reaction stirred at rt for 1 h. More 4N HCl in 1,4-dioxane (0.5 ml) was added and the reaction stirred at rt for 0.5 h then the solvents removed. The residue was dissolved in MeOH (25 ml) and treated with Amberlyst A21 basic resin until the pH was 6. The residue was filtered off and the solvent removed; the residue was subjected to column chromatography on silica gel eluting with 0-20% methanol-DCM to afford the free base of the title compound (67 mg, 89%).

1. stirringthe reaction stirred at rt for 0.5 h
2. customthe solvents removed
3. dissolutionThe residue was dissolved in MeOH (25 ml)
4. additiontreated with Amberlyst A21 basic resin until the pH was 6
5. filtrationThe residue was filtered off
6. customthe solvent removed