Abstract
AbstractA novel approach to various trisubstituted oxazoles (28 examples, up to 88% yield) has been developed via 9H‐thioxanthen‐9‐one (TX) mediated oxidative annulation of N‐acetyl enamide under visible light irradiation in the presence of BF3 ⋅ Et2O (2.0 equiv) and 40 mol% of PhNO2. This metal‐free procedure features high atom and step economy, green and mild conditions and broad substrate scope.
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