A visible light-induced photocatalytic strategy for synthesis of flavonoids was developed through deoxygenative/cyclization reaction of salicylic acid derivatives with aryl acetylene by diphenyl sulfide as an O-transfer reagent. Based on...
A strategy was developed for the visible-light-induced
photocatalytic
synthesis of dihydrochalcone via the deoxygenation and coupling of
benzoic acid derivatives with alkenes using diphenyl sulfide as the
O-transfer reagent. Under mild photoredox conditions, a series of
dihydrochalcone derivatives were produced in moderate to good yields.
A mechanism for the visible-light-induced free-radical coupling was
proposed on the basis of the control experiments. The protocol provides
a new strategy the generation of acyl radicals from carboxylic acids
and the synthesis of dihydrochalcones.
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