Cooperative Lewis acidity in borane-substituted fluorophosphonium cations.
A series of aryl-difluorophosphoranes are converted to give fluorophosphonium salts [Ph2PF(o-C6X4BR2)](+) (X = H, F; R = Cy, Mes). The proximity of the two weakly Lewis acidic fluorophosphonium and borane moieties results in enhanced Lewis acid catalytic reactivity.
Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario M5S 3H6, Canada. dstephan@chem.utoronto.ca.
Juri
J
Möbus
Thorsten
T
Vom Stein
Douglas W
DW
Stephan