反应详情

温度

60 °C

94 g (0.42 mole) of para-[N-(β-ureidoethyl)]amino nitrobenzene is added little by little, while stirring, to 950 cm3 of a 3 N solution of NaOH containing 285 g of technical hydrosulfite, which has first been heated to 60° C. When the addition has been completed the reaction mixture is kept at 70° C until decoloration is complete. The mixture is then filtered, cooled and dried after salting out. The result is 46 g of N-(β-ureidoethyl) para-phenylenediamine which, after recrystallization in isopropyl alcohol, melts at 126°.

1. additionWhen the addition
2. customis kept at 70° C until decoloration
3. filtrationThe mixture is then filtered
4. temperaturecooled
5. customdried
6. customafter recrystallization in isopropyl alcohol