title: Synthesis of benzopyrano[4,3-b](N-arylsulfonyl)indoles and benzopyrano[3,4-b](N-arylsulfonyl)indoles via intramolecular palladium-catalyzed aryl-aryl coupling reaction.
abstract: A series of benzopyrano[3,4-b](N-arylsulfonyl) indole derivatives and benzopyrano[4,3-b](N-arylsulfonyl) indole derivatives were synthesized from 2- or 3-methylindole via intermolecular S(                            N                         )2 reaction and subsequent intramolecular palladium-catalyzed aryl-aryl coupling reaction for the first time. It was suggested that, besides using the Fischer cyclization, benzopyrano[4,3-b]indoles and benzopyrano[3,4-b]indoles could also be prepared via intermolecular S(                            N                         )2 reaction and sequential intramolecular palladium-catalyzed coupling reaction.
authors.affiliation: College of Sciences, Northwest A&F University, Yangling, People's Republic of China.
authors.forename: Ling-Ling
authors.initials: LL
authors.lastname: Fan
authors.forename: Zhi-Ping
authors.initials: ZP
authors.lastname: Che
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Xiang
authors.initials: X
authors.lastname: Yu
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Zhi
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
mesh_terms: D002384:Catalysis; D003500:Cyclization; D007211:Indoles / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*
chemical_list: D007211:Indoles; D010165:Palladium