title: Zwitterionic phosphonium ligands: synthesis, characterization and application in telomerization of 1,3-butadiene.
abstract: Novel zwitterionic phosphonium alkylsulfonate ligands are chemoselectively synthesized from N-heterocyclic phosphines and cyclic sulfones in one step in good to excellent yields. Their in situ generated palladium complexes showed high productivity in the industrial telomerization of 1,3-butadiene with methanol. Optimal results are obtained in the presence of cyclohexyl-substituted ligands under mild conditions and at metal loadings as low as 0.001 mol%.
authors.affiliation: Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Str. 29a, D-18059 Rostock, Germany. matthias.beller@catalysis.de.
authors.forename: A
authors.initials: A
authors.lastname: Pews-Davtyan
authors.forename: R
authors.initials: R
authors.lastname: Jackstell
authors.forename: A
authors.initials: A
authors.lastname: Spannenberg
authors.forename: M
authors.initials: M
authors.lastname: Beller