反应详情

1-[2-(1,4-benzodioxan-2-yl)-2-hydroxyethyl]-4-[(2,6-dimethylphenyl)aminocarbonylmethyl]piperazine acetate (1.0 g) is dissolved in 50 ml 50% aqueous sulfuric acid, and the solution evaporated to dryness. The product is suspended in ethanol and filtered, air dried and recrystallized from methanol/acetone to yield 1-[2-(1,4-benzodioxan-2-yl)-2-hydroxyethyl]-4-[(2,6-dimethylphenyl)aminocarbonylmethyl]piperazine .2HSO4.

1. customthe solution evaporated to dryness
2. filtrationfiltered
3. customair dried
4. customrecrystallized from methanol/acetone