title: Facile, Novel Methodology for the Synthesis of Spiro
abstract: The role of the bifunctional catalyst is decisive: The magnesium ion as Lewis acid and its nucleophilic iodide counterion contribute in synergy to the successful ring expansion of the cyclopropane 1 by aldimine 2 [Eq. (1)]. This reaction offers a novel route to spiro[pyrrolidin-3,3'-oxindoles] 3.
authors.affiliation: Laboratorium für Organische Chemie, ETH-Zentrum, Universitätstrasse 16, CH-8092 Zürich (Switzerland).
authors.initials: PB
authors.lastname: Alper
authors.initials: C
authors.lastname: Meyers
authors.initials: A
authors.lastname: Lerchner
authors.initials: DR
authors.lastname: Siegel
authors.initials: EM
authors.lastname: Carreira