Patent ID: 11969719
Assignee: JILIN UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 3:
4. The preparation method according to claim 1, wherein the first alkali comprises one selected from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate and cesium carbonate; the first catalyst comprises phenanthroline and cuprous iodide; a molar ratio of the bis(4-bromophenyl)amine:the X-R compound:the first alkali is 1:(1-1.5):(8-9); a molar ratio of the cuprous iodide:the phenanthroline is (0.03-0.05):(0.03-0.05); a molar ratio of the bis(4-bromophenyl)amine:the cuprous iodide is 1:(0.03-0.05); and a temperature of the Ullmann reaction is between 110 degrees Celsius (° C.) and 120° C., and a time of the Ullmann reaction is between 20 h and 30 h.