title: Synthesis of functionalized dioxa-aza[7]helicenes using palladium catalyzed arylations.
abstract: Despite the recent reports on transition-metal catalyzed cycloisomerization strategies toward helicenes, the amount of palladium catalyzed routes remains rather scarce. Within this letter the successful preparation and characterization of novel dioxa-aza[7]helicenes using palladium mediated coupling reactions is presented.
authors.affiliation: Molecular Design and Synthesis, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
authors.forename: Hans
authors.initials: H
authors.lastname: Kelgtermans
authors.forename: Liliana
authors.initials: L
authors.lastname: Dobrzańska
authors.forename: Luc
authors.initials: L
authors.lastname: Van Meervelt
authors.forename: Wim
authors.initials: W
authors.lastname: Dehaen
mesh_terms: D001372:Aza Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D001572:Benzofurans / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D003500:Cyclization; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*; D011083:Polycyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D001372:Aza Compounds; D001572:Benzofurans; D011083:Polycyclic Compounds; C031660:helicenes; D010165:Palladium