title: Thrilling strain! Donor-acceptor-substituted cyclobutanes for the synthesis of (hetero)cyclic compounds.
abstract: The analogy goes further: Following the often-studied donor-acceptor-substituted cyclopropanes, the corresponding cyclobutane derivatives were employed for the ring-strain-driven stereoselective syntheses of carbo- and heterocycles.
authors: Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin (Germany). hans.reissig@chemie.fu-berlin.de.
authors: Hans-Ulrich
authors: HU
authors: Reissig
authors: Reinhold
authors: R
authors: Zimmer
keywords: cycloaddition; cyclobutanes; homogeneous catalysis; photochemistry; pyrans