title: Radical carbon-carbon bond formations enabled by visible light active photocatalysts.
abstract: This mini-review highlights the Stephenson group's contribution to the field of photoredox catalysis with emphasis on carbon-carbon bond formation. The realization of photoredox mediated reductive dehalogenation initiated investigations toward both intra- and intermolecular coupling  reactions. These reactions commenced via visible light-mediated reduction of activated halogens to give carbon-centered radicals that were subsequently involved in carbon-carbon bond forming transformations. The developed protocols using Ru and Ir based polypyridyl complexes as  photoredox catalysts were further tuned to efficiently catalyze overall redox neutral atom transfer radical addition reactions. Most recently, a simplistic flow reactor technique has been utilized to affect a broad scope of photocatalytic transformations with significant enhancement in reaction  efficiency.
authors.affiliation: Department of Chemistry, Boston University, 590 Commonwealth Ave, Boston, MA 02215, USA.
authors.forename: Carl-Johan
authors.initials: CJ
authors.lastname: Wallentin
authors.forename: John D
authors.initials: JD
authors.lastname: Nguyen
authors.forename: Corey R J
authors.initials: CR
authors.lastname: Stephenson
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D005609:Free Radicals / Q000737:chemistry; D008027:Light; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D055668:Photochemical Processes
chemical_list: D005609:Free Radicals; D009942:Organometallic Compounds; D002244:Carbon