Riboflavin Photocatalyzed Dearomative Spiro-Etherification of Naphthols.
Nabakumar BeraBhabani Sankar LenkaBurkhard KönigDebayan SarkarPublished in: The Journal of organic chemistry (2023)
The dearomative spiro-etherification of naphthols is achieved using catalytic amounts of riboflavin tetracetate (RFTA) as a photosensitizer and molecular oxygen as a terminal oxidizing agent under blue light (440 nm) irradiation in the presence of acid. The presence of acid increases the photooxidation power of RFTA and facilitates the dearomatization reaction.