title: Synthesis and reaction of the first 1,2-oxaphosphetane complexes.
abstract: While P(V) 1,2-oxaphosphetanes are well known from the Wittig reaction, their P(III) analogues are still unexplored. Herein, the synthesis and reactions of the first 1,2-oxaphosphetane complexes are presented, which were achieved by reaction of the phosphinidenoid complex [Li(12-crown-4)(solv)][(OC)5W{(Me3Si)2HCPCl}] with different epoxides. The title compounds appeared to be stable in toluene up to 100 °C, before unselective decomposition started. Acid-induced ring expansion with benzonitrile resulted in selective formation of the first complex bearing a 1,3,4-oxazaphosphacyclohex-2-ene ligand.
authors.affiliation: Institut für Anorganische Chemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhardt-Domagk-Strasse 1, 53121 Bonn (Germany) http://anorganik.chemie.uni-bonn.de/akstreubel/
authors.forename: Andreas Wolfgang
authors.initials: AW
authors.lastname: Kyri
authors.forename: Vitaly
authors.initials: V
authors.lastname: Nesterov
authors.forename: Gregor
authors.initials: G
authors.lastname: Schnakenburg
authors.forename: Rainer
authors.initials: R
authors.lastname: Streubel
keywords: Wittig reaction; oxaphosphetane complexes; phosphinidenoid complexes; ring expansion; ring insertion