Abstract:

The Diels-Alder reaction between furan derivatives and dimethylacetyl enedecarboxylate was examined in ionic liquid with [Bmim]Tf2N, [Bmim] PF6, [Bmim] BF4, and it is found that the lower the polarity of the furan derivatives is, the better the reactivity can be found. The high yield(53%) of Diels-Alder reaction of alkylthiofuran with alkylacetylenedicarboxylate is observed when used [Bmim] PF6 ionic liquid. Furthermore, it is observed that a higher reactivity is achieved when the reaction was conducted on the surface of silica gel coated with ionic liquid, and the silica gel coated with ionic liquid is easily recycled three times without any significant decrease in chemical yields.

Key words: Diels-Alder reaction, furan derivatives, ionic liquid, silica-gel