title: Efficient synthesis of biscarbazoles by palladium-catalyzed twofold C-N coupling and C-H activation reactions.
abstract: A new and efficient strategy for the synthesis of 3,9'- and 2,9'-biscarbazoles was developed. Our strategy relies on the cyclization of 1,1'-biphenyl-2,2'-diyl bis(trifluoromethanesulfonate) with 4- or 3-anisidine, transformation of the methoxy to a triflate group and subsequent oxidative Pd-catalyzed cyclization with various anilines.
authors.affiliation: Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany.
authors.forename: Tran Quang
authors.initials: TQ
authors.lastname: Hung
authors.forename: Ngo Ngoc
authors.initials: NN
authors.lastname: Thang
authors.forename: Do Huy
authors.initials: do H
authors.lastname: Hoang
authors.forename: Tuan Thanh
authors.initials: TT
authors.lastname: Dang
authors.forename: Alexander
authors.initials: A
authors.lastname: Villinger
authors.forename: Peter
authors.initials: P
authors.lastname: Langer
mesh_terms: D002227:Carbazoles / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D018360:Crystallography, X-Ray; D003500:Cyclization; D008958:Models, Molecular; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*
chemical_list: D002227:Carbazoles; D010165:Palladium