氟硼酸重氮盐裂解反应条件的探讨

讨论了以重氮化法合成4，4’-二氟二苯甲酮路线中的关键工艺——重氮盐裂解的各种影响因素。研究发现，通过加入Fe粉末作催化剂，将干燥的氟硼酸重氮盐分批次缓慢加入到m（重氮盐）：m（甲苯）=1：2．6的甲苯溶剂中裂解，反应可以十分平稳、温和地进行，并且其收率可以稳定在85％左右，含量达94％以上（气相色谱）。

The Research to the Condition of Catalytic Degradation of Borofluoric Acid Diazonium Salt

Discussed the influencing factors of the the catalytic degradation of borofluorie acid diazonium salt, which was the key step to synthesize 4, 4＇ - difluorobenzophenone. It was found that with iron powder as catalyst and adding dry diazonium salt to toluene whose volume was triple - weight of diazonium salt, the reaction could be occurred smoothly. And with those conditions the yield of the reaction could be up to 85% and the purity could be 94% （ with GC detection ）.