反应详情

20 ml of 2-propanol and 10 ml of isobutanol (2-methylpropan-1-ol) and also 20.0 ml of hydrazinium hydroxide are added to 17.5 g of methyl 4-benzyloxy-2-ethyl-3-methylbenzoate (C1). The reaction mixture is subsequently heated under reflux for 18 h overnight. After cooling, a further 30 ml of 2-propanol are added to the solution, which is subsequently stirred at room temperature for 30 min. The precipitate is filtered off with suction, and the filter cake is rinsed a number of times with a little 2-propanol. The product is subsequently recrystallised from 2-propanol, and the precipitate obtained is dried overnight in vacuo, giving 12.3 g of the title compound as a colourless, amorphous solid having a melting point of 179° C.; MS: 284.2 (M+); TLC: Rf=0.27 (ethyl acetate/ethanol 97:3 parts by volume).

1. temperatureThe reaction mixture is subsequently heated
2. temperatureunder reflux for 18 h overnight
3. temperatureAfter cooling
4. filtrationThe precipitate is filtered off with suction
5. washthe filter cake is rinsed a number of times with a little 2-propanol
6. customThe product is subsequently recrystallised from 2-propanol
7. customthe precipitate obtained
8. customis dried overnight in vacuo