A Concise Approach to Polysubstituted Oxazoles from N-Acyl-2-bromo Enamides via a Copper(I)/Amino Acid-Catalyzed Intramolecular C—O Bond Formation.
2014
A straightforward and efficient copper(I)/amino acid-catalyzed intramolecular Ullmann-type C–O coupling reaction has been developed. This protocol affords a facile methodology for the synthesis of a series of novel 2,4,5-substituted oxazoles from readily accessible N-acyl-2-bromo enamides under mild conditions.
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