Fluorous acid and base catalysts

The two following examples incorporate the fluorous super Brpnsted acid catalyst 13 for the acetalization of benzaldehyde with 1,3-propanediol and for the 

A slightly different type of fluorous lanthanide complex, Yb[C(S02C6Fi3)2 (S02C8Fi7)]3, showed a modest catalytic activity in BTF, but was found to be an effective catalyst in perfluoromethyldecalin for the Friedel-Crafts acylation of arenes with an acid anhydride. For example, anisole reacted with acetyl anhydride in the presence of 10mol% of the catalyst in perfluoromethyldecalin at 110°C for 2h to give the product in an 82% yield. Furthermore, the catalyst was recovered in a 96% yield via extraction of the reaction mixture with hot perfluoromethyldecalin ( 85°C). A 77% conversion was obtained in a second reaction with the recycled catalyst. 

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