title: Visible Light Photocatalysis of Radical Anion Hetero-Diels-Alder Cycloadditions.
abstract: We have discovered a photocatalytic intramolecular hetero-Diels-Alder reaction of tethered bis(enones). This transformation involves the intermediacy of an enone radical anion and constitutes the formal coupling of an electron-deficient heterodiene with an electronically mismatched enone dienophile. The diastereoselectivity and regioselectivity of the process are high, and the dihydropyran products are amenable to a variety of synthetically useful transformations.
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706.
authors.forename: Anna E
authors.initials: AE
authors.lastname: Hurtley
authors.forename: Megan A
authors.initials: MA
authors.lastname: Cismesia
authors.forename: Michael A
authors.initials: MA
authors.lastname: Ischay
authors.forename: Tehshik P
authors.initials: TP
authors.lastname: Yoon