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Pd complexes have shown great potential for the development of versatile aerobic reactions because of their ability to directly couple O2 reduction,which have afforded new opportunities for selective oxidation chemistry.1 In our continued interest on synthetic chemistry using Pd/O2 catalytic system,2 we now focus on developing simple and efficient methods to synthesize heterocycles from unsaturated alkenes or/and alkynes through the appropriate choice of Pd catalysts and O2.