氟硼酸重氮盐裂解反应条件的探讨  

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

作　　者：周华[1] 祁军[1] 

机构地区：[1]湖北省化学研究院,湖北武汉430074

出　　处：《山东化工》2009年第1期18-20,共3页Shandong Chemical Industry

摘　　要：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)。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 ）.

关 键 词：氟硼酸重氮盐 重氮化法 催化裂解 4 4’-二氟二苯甲酮 

分 类 号：TQ244.2[化学工程—有机化工]