J. Blum et al., Palladium-catalyzed cross-methylation of aryl triflates by intramolecularly stabilized dialkyl-aluminum, -gallium and -indium reagents, J MOL CAT A, 165(1-2), 2001, pp. 97-102
Several phenyl and naphthyl triflates undergo catalytic cross-methylation w
ith the monomeric and dimeric dimethylaluminum, -gallium and -indium comple
xes 1a, 1b, 1c, 3a, 3b and 3c in the presence of either PdCl2(PPh3)(2). Pd(
PPh3)(4) or Pd(binap)(OAc)(2). 4-Bromophenyl triflate reacts selectively vi
a the triflate function. Structural features of the substrate and the methy
lating agent, as well as the nature and quality of the palladium catalyst h
ave a considerable influence on the cross-coupling process. (C) 2001 Elsevi
er Science B.V. All rights reserved.