A Tandem Coupling/Smiles Rearrangement/Cyclization Approach to 1,4-Benzooxazinones or 1,4-Pyridooxazinones under Mild Conditions.

A simple protocol is developed for the reaction of 1,2-dihalobenzenes or 2-halonitroarenes with 2-hydroxyacetamides to give benzoxazinone skeletons.