title: Exploiting a novel size exclusion phenomenon for enantioselective acid/base cascade catalysis.
abstract: A novel size exclusion phenomenon between PS-BEMP and sterically bulky BPAs, has been discovered and exploited in a one-pot base-catalysed Michael addition/acid-catalysed enantioselective N-acyliminium cyclisation cascade, allowing the preparation of structurally complex β-carbolines with moderate to good enantiocontrol.
authors.affiliation: Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.  Darren.dixon@chem.ox.ac.uk.
authors.forename: Michael E
authors.initials: ME
authors.lastname: Muratore
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Adam W
authors.initials: AW
authors.lastname: Pilling
authors.forename: R Ian
authors.initials: RI
authors.lastname: Storer
authors.forename: Darren J
authors.initials: DJ
authors.lastname: Dixon