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Riboflavin Photocatalyzed Dearomative Spiro-Etherification of Naphthols

Bera, Nabakumar ; Lenka, Bhabani Sankar ; König, Burkhard ; Sarkar, Debayan



Abstract

The dearomative spiro-etherification of naphthols isachieved usingcatalytic amounts of riboflavin tetracetate (RFTA) as a photosensitizerand molecular oxygen as a terminal oxidizing agent under blue light(440 nm) irradiation in the presence of acid. The presence of acidincreases the photooxidation power of RFTA and facilitates the dearomatizationreaction.


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