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The catalytic system involving Sc(OTf)3 and a dendritic terpyridine ligand is able to promote the Friedel–Crafts acylation of a wide range of aromatics under microwave irradiation. The expected products are obtained in high yields after short reaction times and the nano-sized catalyst can be recovered and successfully used in 12 consecutive runs.
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Perrier et al. (2013) studied this question.
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