超声波辐射下芳香族硝基化合物的氢转移还原  

Transfer Hydrogenation Reduction of Aromatic Nitro-compounds under Ultrasonic Irradiation

作　　者：蔡可迎[1] 

机构地区：[1]徐州教育学院化学系,徐州221006

出　　处：《精细石油化工进展》2007年第4期47-49,共3页Advances in Fine Petrochemicals

摘　　要：以次磷酸钠为还原剂,Pd/C为催化剂,在超声波辐射作用下还原了几种芳香族硝基化合物,在20～60min的时间内,芳香胺的收率为90%～99%。以10mmol邻硝基甲苯为底物进行实验,获得的较优反应条件为:n(次磷酸钠):n(邻硝基甲苯)=3:1,催化剂50%Pd/C用量0·05g,溶剂50%乙醇溶液用量10mL,反应时间20min。在此条件下,邻甲基苯胺的收率达到98%。Several aromatic nitro - compounds were reduced to corresponding aromatic amines with sodium hypophosphite in the presence of catalyst Pd/C under ultrasonic irradiation. The yields of aromatic amines were 90% 99 % at reaction time 20 - 60 min. The optimum reaction conditions for o - nitrotoluene as reactant were obtained and those were n （sodium hypophosphite） ： n （o - nitrotoluene） = 3： 1, the amount of catalyst 50% Pd/C 0.005 g/mmol o -nitrotoluene,50% ethanol solvent 10 mL, and reaction time 20 min. The yield of o -toluidine was up to 98 % under above conditions.

关 键 词：芳香族硝基化合物 芳香胺 超声波辐射 还原 

分 类 号：O621.2[理学—有机化学]