title: Relay catalysis: combined metal catalyzed oxidation and asymmetric iminium catalysis for the synthesis of bi- and tricyclic chromenes.
abstract: A catalytic asymmetric oxidative iminium-allenamine cascade allows the use of propargyl alcohols as stable substrates and yields valuable chiral bicyclic 4H-chromenes. A subsequent Michael addition-condensation domino reaction provides complex tricyclic 4H-chromenes in a highly enantioselective fashion.
authors.affiliation: RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany. magnus.rueping@rwth-aachen.de
authors.forename: Magnus
authors.initials: M
authors.lastname: Rueping
authors.forename: Jeremy
authors.initials: J
authors.lastname: Dufour
authors.forename: Modhu Sudan
authors.initials: MS
authors.lastname: Maji