Abstract
A visible light mediated deformylative alkynylation of aldehydes is presented. Under photo irradiation, 1,4-dihydropyridine (DHP), derived from an aldehyde, generated a C(sp3)- radical which couples with an alkynylbenziodoxolone to generate an alkyl substituted alkyne coupling product. This strategy is mild and easy to operate, a wide range of functional groups were tolerated, and 16 examples of products with 35–86% yields were obtained.
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