反应详情

11.35 g (50 mmol) of 2,3-dichloro-4,5-dicyanobenzoquinone are added to a mixture of 21.5 g (50 mmol) of the compound from Example 2 in 800 ml of dichloromethane and the mixture is stirred at room temperature for 1 h. The solution is filtered from a beige precipitate, the filtrate is washed four times with water, the organic phase is dried over sodium sulphate, filtered through a thin layer of active carbon and the filtrate is concentrated in vacuo. The residue is crystallized from ether/petroleum ether.

1. filtrationThe solution is filtered from a beige precipitate
2. washthe filtrate is washed four times with water
3. dry with materialthe organic phase is dried over sodium sulphate
4. filtrationfiltered through a thin layer of active carbon
5. concentrationthe filtrate is concentrated in vacuo
6. customThe residue is crystallized from ether/petroleum ether