摘要
以1-丁基-3-甲基咪唑盐作为离子液体阳离子,与3种不同阴离子BF4、PF6、Tf2N组成性质不同的3种离子液体,催化呋喃类和丁炔二羧酸酯之间发生Diels-Alder反应,合成了一系列化合物,研究了离子液体的催化效果。研究结果表明,呋喃类化合物的极性越低,Diels-Alder反应的活性越高。在含硫的呋喃类化合物的反应中,当以[Bmim]PF6作离子液体时,Diels-Alder反应产率可达53%。当[Bmim]PF6离子液体被吸附在硅胶表面上时,Diels-Alder的反应产率有所提高。
The Diels-Alder reactions between furan derivatives and dimethylacetyl enedecarboxylate were examined in ionic liquids [Bmim] Tf2N,[Bmim] PF6,and [Bmim] BF4,and it was found that the lower the polarity of the furan derivatives,the better the reactivity.The high yield（53%） of Diels-Alder reaction of alkylthiofuran with alkylacetylenedicarboxylate was observed when [Bmim] PF6 was used.Furthermore,it was observed that a higher reactivity was achieved when the reaction was conducted on the surface of silica gel coated with ionic liquid,and the silica gel supported ionic liquid was recycled three times without any significant decrease in chemical yield.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第8期899-904,共6页
Chinese Journal of Applied Chemistry
基金
新疆大学博士启动基金(B070269)项目资助
