title: Metal-Free Visible Light-Mediated Photocatalysis: Controlling Intramolecular [2 + 2] Photocycloaddition of Enones through Axial Chirality.
abstract: Atropisomeric enone-imides and enone-amides featuring N-CAryl bond rotation were evaluated for intramolecular [2 + 2] photocycloaddition. Straight addition product was observed over cross-addition product with good control over reactivity. The atropselectivity was found to be dependent on the substituent on the aryl ring. Substitution-dependent atropselectivity was rationalized on the basis of a divergent mechanistic pathway.
authors.affiliation: Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States.
authors.forename: Anthony
authors.initials: A
authors.lastname: Clay
authors.affiliation: Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States.
authors.forename: Nandini
authors.initials: N
authors.lastname: Vallavoju
authors.affiliation: Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States.
authors.forename: Retheesh
authors.initials: R
authors.lastname: Krishnan
authors.affiliation: Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States.
authors.forename: Angel
authors.initials: A
authors.lastname: Ugrinov
authors.affiliation: Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States.
authors.forename: Jayaraman
authors.initials: J
authors.lastname: Sivaguru