Phenyl Derivatives of Antimony (III,V) and Bismuth (III,V) in the Presence of Palladium Salts, as C-Phenylating Agents for Methyl Acrylate

摘要

The C-phenylation of methyl acrylate to methyl cynnamate with Ph_3Sb, Ph_3SbX_2 (X = Cl, OAc), Ph_3Bi, and Ph_3BiX_2 (X = OAc, O_2CEt) in the presence of PdCl_2, Pd(OAc)_2, Li_2PdCl_4. NaPd(OAc)Cl_2, and Na_2Pd(OAc)_2Cl_2 was studied to show that the reactions with Ph_3Sb and Ph_3Sb(OAc)_2 are more selective and give higher yields of the target product than those with Ph_3Bi and Ph_3Bi(OAc)_2, while Ph_3M(OAc)_2 are preferred over Ph_3M. Copper (II) alkanecarboxylate additives have no effect on the yield of methyl cynnamate in the reactions with Ph_3Sb.