A one-pot visible-light strategy for cyclobutanone synthesis via sequential [2 + 2] cycloaddition and Nef reaction of nitroalkenes and 2-vinylpyridines

A visible-light one-pot strategy synthesizes pyridinyl-cyclobutanones via sequential [2 + 2] photocycloaddition and photo-Nef of nitroalkenes and 2-vinylpyridines, achieving high yields without isolating intermediates.