反应详情

A solution of 1,1-dimethylethyl {1-[2-(6-chloro-1-oxido-3-oxo-1,2,4-benzotriazin-4(3H)-yl)ethyl]-4-piperidinyl}(2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)carbamate (81 mg, 0.141 mmol) in chloroform (1 ml) and MeOH (1 ml) was added 4M HCl in 1,4-dioxane (1 ml) and the reaction was stirred at rt for 0.5 h before evaporation, treatment with sat. aq NaHCO3 (50 ml). The reaction was then extracted with 20% MeOH in DCM (3×100 ml). The combined organic phases were dried, evaporated and the crude residue purified by chromatography on silica gel using a 0-20% MeOH/DCM gradient to provide the free base of the title compound as a yellow foam (60 mg, 90%).

1. extractionThe reaction was then extracted with 20% MeOH in DCM (3×100 ml)
2. customThe combined organic phases were dried
3. customevaporated
4. customthe crude residue purified by chromatography on silica gel using a 0-20% MeOH/DCM gradient