title: Photocatalytic N-formylation of amines via a reductive quenching cycle in the presence of air.
abstract: Photochemical N-formylation of amines was performed under simple and mild reaction conditions. Amines are common electron donors in reductive photocatalysis, which then typically decompose after donating an electron to the photocatalyst. We have found that these oxidized amines can be utilized to give N-formamides in the presence of air without additional formylating agents. The reaction proceeds via the in situ formation of enamines. Oxygen (air) is necessary for the reaction to occur as it regenerates the photocatalyst forming superoxide radical anions as crucial intermediates involved in the reaction.
authors.affiliation: Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany. Burkhard.Koenig@ur.de.
authors.forename: Tamal
authors.initials: T
authors.lastname: Ghosh
authors.affiliation: Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany. Burkhard.Koenig@ur.de.
authors.forename: Amrita
authors.initials: A
authors.lastname: Das
authors.affiliation: Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany. Burkhard.Koenig@ur.de.
authors.forename: Burkhard
authors.identifier: http://orcid.org/0000-0002-6131-4850
authors.initials: B
authors.lastname: König