Abstract
A simple and efficient visible-light-induced methodology has been developed for the
selective synthesis of dihydro-4H-furo[3,2-c]chromen-4-one derivatives via dehydrogenative coupling reaction. The methodology
is highly useful for the synthesis of varieties of dihydro-4H-furo[3,2-c]chromen-4-ones from readily accessible reactants under oxygen atmosphere. Importantly,
the additive-free approach has been also demonstrated for this transformation. The
results of the mechanistic investigation showed that this dehydrogenative reaction
proceeded through a radical pathway. Additionally, the synthesized dihydro-4H-furo[3,2-c]chromen-4-one has been transformed into different 4H-furo[3,2-c]chromen-4-ones through simple protocols.
Key words
photocatalysis - dehydrogenative coupling - erythrosine B - oxygen - dihydro-4
H-furo[3,2-
c]chromen-4-one
