Structure and reactivity of new phosphine ligands containing the hemi-labile sulfone moiety.
New heterofunctional phosphine ligands have been synthesised, incorporating the substitutionally labile sulfone and sulfonamide moieties as chelating groups, which display activity in the palladium-catalysed Suzuki and amination cross-coupling reactions. Single-crystal X-ray diffraction studies of the complexes formed with [Pd(mu-Cl)(dmba)] (dmba-H = N,N-dimethylbenzylamine) highlight the coordinating nature of these ligands; showing the formation of a bis chelate complex through a six-membered Pd-P-C-C-S-O ring with the sulfonamide class of ligands.
Chapman
Christopher J
CJ
Department of Chemistry, University of Bath, Claverton down, Bath, UK BA2 7AY.
Frost
Christopher G
CG
Mahon
Mary F
MF