Annulation of enamides into 2,5- and 2,4,5-substituted oxazoles by NBS/Me2S in the presence of mild base has been achieved. The reaction conditions are simple and tolerant to a wide variety of substituents including both electron-donating and withdrawing groups to produce oxazoles in one-pot without further purification of the intermediate.
N. Panda and R. Mothkuri, New J. Chem., 2014, 38, 5727 DOI: 10.1039/C4NJ01101E
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