title: Cycloaddition of P-C Single Bonds: Stereoselective Formation of Benzo-1,3,6,2-trioxaphosphepine Complexes via a Ditopic van der Waals Complex.
abstract: While phosphaalkenes and phosphanes are known to participate in [4+n] cycloaddition reactions, P-C single bonds are inert in this respect. Herein, reactions of oxaphosphirane complexes with tetrachloro-ortho-benzoquinone are presented that reveal a stereoselective reaction of the endocyclic P-C bond to afford benzo-1,3,6,2-trioxaphosphepine complexes. High-level DFT calculations provide evidence that the final product is derived from a sequence of three consecutive steps involving a ditopic van der Waals complex.
authors.affiliation: Sant Longowal Institute of Engineering & Technology, Longowal, Sangrur, Punjab, 148106, India.
authors.forename: Payal
authors.initials: P
authors.lastname: Malik
authors.affiliation: Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 30100, Murcia, Spain. artuesp@um.es.
authors.forename: Arturo
authors.initials: A
authors.lastname: Espinosa Ferao
authors.affiliation: Institut für Anorganische Chemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhardt-Domagk-Strasse 1, 53121, Bonn, Germany.
authors.forename: Gregor
authors.initials: G
authors.lastname: Schnakenburg
authors.affiliation: Institut für Anorganische Chemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhardt-Domagk-Strasse 1, 53121, Bonn, Germany. r.streubel@uni-bonn.de.
authors.forename: Rainer
authors.initials: R
authors.lastname: Streubel
keywords: cycloaddition; oxaphosphirane complexes; phosphanes; ring expansion; trioxaphosphepine complexes