Abstract
Catalyzed by CuOTf under very mild conditions, aryl triflates which are embedded in the azacalix[1]arene[3]pyridine macrocycle underwent coupling reactions with metal halides and acetates to afford respectively halogenated and acyloxylated arene products in moderate to excellent yields. The unprecedented CuOTf-catalyzed transformations of aryl triflates proceeded through an oxidative addition of intramolecularly chelated Cu(I) into the C–O bond of aryl triflates to form arylcopper(III) intermediates which underwent anion exchange and reductive elimination reactions with nucleophiles to yield functionalized macrocyclic products.
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