SiO_2负载壳聚糖席夫碱钯催化苯乙炔与碘代苯Sonogashira反应  

Reaction of Phenylacetylene with Iodobenzene catalyzed by SiO_2-Supported Chitosan Schiff-Base Palladium Catalyst

作　　者：朱虹[1] 唐星华[1] 黄欣毅[1] 

机构地区：[1]南昌航空大学环境与化学工程学院,江西南昌330063

出　　处：《江西化工》2012年第1期46-54,共9页Jiangxi Chemical Industry

摘　　要：制备了SiO2负载壳聚糖席夫碱钯催化剂,利用X-射线衍射,红外光谱和热重等方法对其进行了表征。以苯乙炔和碘代苯为反应物,研究了该催化剂的催化性能,同时考察了不同反应条件(反应时间,反应温度,催化剂用量等因素)对该反应的影响。最终得出了最佳反应条件:碘代苯4mmol,苯乙炔4mmol,K2CO3用量8mmol,催化剂0.1g(Pd质量分数为3.8%),乙醇16ml,N2气保护下80℃反应9h,产率达95.40%。该催化剂经过滤分离,溶剂洗涤,重复使用3次仍有较高的催化活性。A silica-supported chitosan（CS）schiff base（SB） palladium complex（SiO2-CS-SB-Pd） wasprepared and characterized by X-ray diffraction,Fourier transform infrared spectroscopy,and thermalgravimetric analysis.The catalytic performance of the catalyst was studied using the reaction of p-henylacetylene with iodobenzene as probe reaction.The influence of the different reaction conditi-ons（reactiontime,reaction temperature,catalyst amounts and other factors）were also investigated.T-he best conditions for the reaction were obtained： Iodobenzene 4mmol,phenylacetylene 4mmol,K2CO38mmol,catalyst0.1g（Pd%=3.8%）,ethanol（16ml） as the solvent,80℃under the protection of N2 atm-osphere,reaction time 9h.The catalyst still has higher catalytic activity after repeatedlyusing three times.

关 键 词：壳聚糖 席夫碱钯催化剂 苯乙炔 碘代苯 二苯乙炔 

分 类 号：O643.32[理学—物理化学]