Furans-Maleimides Diels-Alder Reactions in Protic Ionic Liquid  

作　　者：XAWKAT Ahmat ABLAJAN Keyume HIRAKU Shinozaki 

机构地区：[1]Department of Materials and Life Sciences, Graduate School of Advanced Science and Technology, Tokyo Denki University [2]Institute of Chemistry and Chemical Engineering, Xinjiang University

出　　处：《Chemical Research in Chinese Universities》2009年第2期161-168,共8页高等学校化学研究（英文版）

摘　　要：The authors have studied the Diels-Alder reactions between furan derivatives and maleimide derivatives in an ionic liquid and have found that higher reactivity can be obtained in a protic ionic liquid [Mim]Tf2N than in the conventional organic solvent. Furthermore, in the Diels-Alder reactions of 2- and 2,5-alkylfurans with N-alkylma- leimide, the reactivity increases by extending the alkyl chain length of N-alkylmaleimide. In addition, it was demon- strated that endo-selectivity increases when 2,5-disubstituted furans are used. These results will be explained by comparing the stability of the Diels-Alder adduct with that of the products obtained from the reactions of 2-substituted furans and 2,5-disubstituted furans.The authors have studied the Diels-Alder reactions between furan derivatives and maleimide derivatives in an ionic liquid and have found that higher reactivity can be obtained in a protic ionic liquid [Mim]Tf2N than in the conventional organic solvent. Furthermore, in the Diels-Alder reactions of 2- and 2,5-alkylfurans with N-alkylma- leimide, the reactivity increases by extending the alkyl chain length of N-alkylmaleimide. In addition, it was demon- strated that endo-selectivity increases when 2,5-disubstituted furans are used. These results will be explained by comparing the stability of the Diels-Alder adduct with that of the products obtained from the reactions of 2-substituted furans and 2,5-disubstituted furans.

关 键 词：Diels-Alder reaction Furan derivative Maleimide derivative Protic ionic liquid 

分 类 号：O621.2[理学—有机化学]