Oxazoles with their 2 and 5 positions substituted with aryl or alkyl groups are regarded as privileged heterocyclic motifs in numerous pharmacologically active synthetic molecules.[1] They are also widespread in bioactive natural products.[2] Subsequently, a lot of new methods have been developed to form oxazoles.[3–6] Among these methods, the intramolecular cyclization of acyclic precursors,[3] the oxidative coupling of amines and ...