BiO(OH)-NaBH4还原法制备氧化偶氮苯类化合物  

Reduction of Nitro Aromatic Compounds to Azoxy Compounds by Bismuth Oxide Hydroxide-Sodium Borohydride

作　　者：蔡可迎[1,2] 黄耀国[2] 宗志敏[2] 魏贤勇[2] 

机构地区：[1]徐州教育学院化学系,徐州221006 [2]中国矿业大学化工学院,徐州

出　　处：《应用化学》2008年第3期372-374,共3页Chinese Journal of Applied Chemistry

基　　金：江苏省高新技术产业发展项目(JHB05-33)

摘　　要：以NaOH溶液快速沉淀BiCl3溶液制备了BiO（OH），研究了BiO（OH）对NaBH4还原芳香族硝基化合物的催化性能，考察了NaBH4用量对反应的影响。结果表明，在温和条件下BiO（OH）具有很高的催化活性和选择性。NaBH4和芳香族硝基化合物的摩尔比为1．04：1，在甲醇中室温反应2h，芳香族硝基化合物主要被还原为氧化偶氮苯类化合物，收率80．4％～96．9％。该催化剂重复使用5次后活性没有明显下降，于120℃再生后，其活性与新制备催化剂相当。Bismuth oxide hydroxide was prepared by rapid precipitation from a solution of bismuth （ Ⅲ ） chloride with sodium hydroxide, which was used as a catalyst for the reduction of nitro aromatic compounds with sodium borohydride. The catalytic performance of bismuth oxide hydroxide and the effect of the amount of sodium borohydride on the reduction were investigated. The results showed that bismuth oxide hydroxide had a high activity and selectivity for the reduction under mild reaction conditions. At a mole ratio of 1.04：1 of sodium borohydride to each of nitro aromatic compounds in methanol and 2 h and r. t. , the corresponding azoxy compounds were prepared in 80. 4% -96.9% yields. Moreover, no obvious deactivation was observed after five times recycling of the catalyst, which can be regenerated at 120 ℃ and then recycled very easily.

关 键 词：氧化偶氮苯 硼氢化钠 还原 氢氧化氧铋 

分 类 号：O625.6[理学—有机化学]