反应详情

A solution of 1,1-dimethylethyl {1-[2-(7-fluoro-2-oxo-1(2H)-quinoxalinyl)ethyl]-4-piperidinyl}carbamate (8.72 g, 22.36 mmol) in methanol (90 ml) and dichloromethane (150 mL) was treated with 4 M hydrogen chloride in 1,4-dioxane (150 mL) (added in a slow stream, some exotherm and rapid precipitation observed) and stirred at room temperature for 2.5 h. The mixture was evaporated to dryness and the residue was triturated with ether. The solid was filtered off, washed with ether and dried to give the amine salt as a grey-green solid (8.06 g, 99%).

1. additionadded in a slow stream
2. customsome exotherm and rapid precipitation
3. customThe mixture was evaporated to dryness
4. customthe residue was triturated with ether
5. filtrationThe solid was filtered off
6. washwashed with ether
7. customdried