反应详情

5.08 g (18 mmol) of 5-amino-3-ethyl-1-(1-methyl-4-phenyl-butyl)-1-H-pyrazole-4-carbonitrile are dissolved in 100 ml of ethanol and, after 100 ml of concentrated NH3 solution (25% strength) and 50 ml of hydrogen peroxide solution (30% strength) have been added, the solution is stirred for 16 hours at room temperature. After the non-aqueous solvents have been removed, the pH is brought to 5 with 1N HCl. The aqueous phase is extracted three times with dichloromethane, and the organic phase is dried over sodium sulphate and evaporated on a rotary evaporator. This gives 3.58 g of a brown oil (66%).

1. customAfter the non-aqueous solvents have been removed
2. extractionThe aqueous phase is extracted three times with dichloromethane
3. dry with materialthe organic phase is dried over sodium sulphate
4. customevaporated on a rotary evaporator