Photocatalyzed Arylthiolation/Cyclization of 3‐(2‐(Ethynyl)phenyl)quinazolinones with Disulfides towards Arylthiolated Quinolino[2,1‐b]quinazolinones

An approach to the synthesis of arylthiolated quinolino[2,1‐b]quinazolinones has been developed using unactivated alkynes containing quinazolinones and diaryldisulfides under visible light irradiation. The procedure entails a sequential radical arylthiolation and cyclization reaction. A possible radical mechanism has been investigated and proven as a single electron transfer (SET) procedure.