反应详情

0.23 g (0.00077 mol) of 5-(4-p-tolyl-piperazin-1-ylmethyl)-pyrimidine-2,4-diamine was dissolved in 220 ml of hot methanol. The solution was treated at room temperature with 0.44 ml (0.00154 mol) of 3.5N ethanolic hydrochloric acid. The solution was completely freed from the solvents and the residue was recrystallized from ethanol/diethyl ether. 0.22 g (77%) of 5-(4-p-tolyl-piperazin-1-ylmethyl)-pyrimidine-2,4-diamine dihydrochloride was obtained as whited crystals; m.p. 220°-222°.

1. customthe residue was recrystallized from ethanol/diethyl ether