反应详情

4.3 g of methyl 3-[7-(3-chloro-4-methoxybenzylamino)-1-methyl-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-propionate are dissolved in 30 ml of tetrahydrofuran (THF) and, after addition of 10 ml of 10% NaOH, stirred at 60° for 8 hours. After addition of 10% HCl, the deposited crystals are separated off and recrystallized from methanol. 3.7 g of 3-[7-(3-chloro-4-methoxybenzylamino)-1-methyl-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl]propionic acid, m.p. 178°, are obtained.

1. customthe deposited crystals are separated off
2. customrecrystallized from methanol