An oxidative cross-dehydrogenative coupling (CDC) reaction for the formation of CC and CP bonds is disclosed using a catalytic amount of DDQ (10 mol %) under aerobic conditions (see scheme). This unprecedented environmentally benign strategy of using AIBN (10 mol %) and molecular oxygen to regenerate DDQ exhibits a larger substrate scope. For the first time, an efficient utility of 4-hydroxycoumarins as pronucleophiles for CDC is presented.
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Alagiri et al. (2012) studied this question.
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