title: Visible light photoredox catalysis: synthesis of indazolo[2,3-a]quinolines from 2-(2-nitrophenyl)-1,2,3,4-tetrahydroquinolines.
abstract: The synthesis of indazolo[2,3-a]quinoline derivatives in moderate to good yields from 2-(2-nitrophenyl)-1,2,3,4-tetrahydroquinolines via visible light photoredox catalysis is reported. The reaction involves a novel ruthenium-catalyzed intramolecular formation of the N-N bond of the indazole ring.
authors.affiliation: Department of Chemistry, Tunghai University , No. 1727, Sec. 4, Taiwan Boulevard, Xitun District, Taichung 40704, Taiwan R.O.C.
authors.forename: Wen-Chung
authors.initials: WC
authors.lastname: Lin
authors.forename: Ding-Yah
authors.initials: DY
authors.lastname: Yang
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D002384:Catalysis; D003500:Cyclization; D007191:Indazoles / Q000138:chemical synthesis* / Q000737:chemistry; D008027:Light; D015394:Molecular Structure; D011804:Quinolines / Q000138:chemical synthesis* / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D000814:Aniline Compounds; D007191:Indazoles; D011804:Quinolines; D012428:Ruthenium; C542964:1,2,3,4-tetrahydroquinoline