Ytterbium(III) trifluoromethanesulfonate catalysed Friedel-Crafts acylation of 1-methylpyrrole in ionic liquid

摘要

In the presence of a catalytic amount of ytterbium (III) trifluoromethanesulfonate [Yb(OTf)(3)], 1-methylpyrrole can easily react with acyl chlorides in an ionic liquid [bpy][BF4](bpy=1-butylpyridine) to form corresponding ketones in satisfactory yield. The recyclability of the ionic liquid/catalyst system is demonstrated.