Abstract
AbstractWe describe a photocatalytic decarboxylative cyclization of 1,6-enynes or N-methacryloyl-2-phenylbenzimidazoles for efficient and ecofriendly syntheses of lactams or benzimidazo[2,1-a]isoquinoline-6(5H)-ones, respectively, by the use of KI/PPh3 as a redox catalyst system. In this method, N-hydroxyphthalimide esters were used as alkyl-radical precursors to achieve this decarboxylative cyclization without any dyes, transition-metal catalysts, oxidants, or bases.
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