反应详情

Phenyl 2,4-dichloro-3-nitrobenzenesulfonate (17.4 g, 0.05 mol) and 25 ml of methylpiperazine in 100 ml of isopropanol were refluxed for 10 minutes and subsequently concentrated. The residue was stirred with 50 ml of 50% methanol, filtered off with suction, and washed with 50% methanol and finally with water. Melting point 94-95° C. (after recrystallization from cyclohexane).

1. concentrationsubsequently concentrated
2. filtrationfiltered off with suction
3. washwashed with 50% methanol and finally with water
4. customMelting point 94-95° C. (after recrystallization from cyclohexane)