Visible light photocatalysis of intramolecular radical cation Diels-Alder cycloadditions.
Intramolecular radical cation Diels-Alder reactions can be conducted under photocatalytic conditions using visible light irradiation. The photocatalyst system involves the use of a Ru(bpy)(3) (2+) chromophore and methyl viologen as a co-oxidant. These reactions enable the cycloaddition of substrates whose thermal Diels-Alder cycloadditions are electronically mismatched and thus require forcing conditions. Nevertheless, the radical cation cycloadditions can be conducted on gram scale using ambient sunlight as the only source of irradiation.
Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA.
Shishi
S
Lin
Christian E
CE
Padilla
Michael A
MA
Ischay
Tehshik P
TP
Yoon