title: Asymmetric ion pair catalysis of 6π electrocyclizations: Brønsted acid catalyzed enantioselective synthesis of optically active 1,4-dihydropyridazines.
authors.affiliation: Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
authors.forename: Arindam
authors.initials: A
authors.lastname: Das
authors.forename: Chandra M R
authors.initials: CM
authors.lastname: Volla
authors.forename: Iuliana
authors.initials: I
authors.lastname: Atodiresei
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Bettray
authors.forename: Magnus
authors.initials: M
authors.lastname: Rueping
keywords: Brønsted acid; electrocyclic reactions; heterocycles; reaction mechanisms; synthetic methods