The visible light-induced regioselective synthesis of benzofuro3,2bpyridines from aurone-derived azadienes is achieved through a radical dimerization/aromatization mechanism under catalystfree conditions. In specific instances, spirobenzofuran-2,2′benzofuro[3,2-bpyridines] are formed as intermediates, which can...
Fan et al. (2025) studied this question.