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6922697 
Journal Article 
Lewis Acid Ionic Liquid Immobilized on Chitosan for Synthesis of Dichlorophenylphosphine 
Qiu, X; Xie, Yu; Wang, XY; Cao, QY; Tang, X; Hu, J; Hong, X; Yan, SiF; , 
2013 
Yes 
Asian Journal of Chemistry
ISSN: 0970-7077
EISSN: 0975-427X 
ASIAN JOURNAL OF CHEMISTRY 
SAHIBABAD 
25 
3 
1673-1678 
English 
WOS:000312621400109 
Lewis acid ionic liquid immobilized on chitosan as a new catalyst was prepared via the synthesis of 1-triniethoxy-silylpropy1-3-methylindazolium-chloride-AlCl3, 1-trimethoxy-silylpropyl-3-methylindazolium-chloride-InCl3 and 1-trimethoxy-silylpropyl-3-methylindazolium-chloride-FeCl3 and then grafting them to chitosan respectively. Their catalytic activities were investigated in the synthesis of dichlorophenylphosphine. The results showed when the three catalysts' amounts were 0.0225, 0.0195 and 0.015 g respectively, the substrate of benzene could be completely transformed into dichlorophenylphosphine on the conditions of the phosphorus trichloride 0.22 g, the molar ratio of phosphorus trichloride to benzene 1.8:1, the reaction temperature 75 degrees C and the reaction time 120 min. Moreover, the molar ratios of ionic liquid moiety to benzene were merely 0.285, 0.187 and 0.172% respectively, which were much lower than that of the corresponding pure ionic liquids to benzene. The catalyst can be reused for many times with fine catalytic efficiency. In addition, the new catalyst using chitosan with the higher deacetylation degree as carrier could improve catalytic activity and reusability.