title: Highly efficient Heck reactions of aryl bromides with n-butyl acrylate mediated by a palladium/phosphine-imidazolium salt system.
abstract: [reaction: see text] A new phosphine-imidazolium salt, L.HBr (1, L = (1-ethylenediphenylphosphino-3-(mesityl))imidazol-2-ylidene), has been prepared. A combination of 0.5 mol % of Pd(dba)(2) and 0.5 mol % of L.HBr in the presence of 2 equiv of Cs(2)CO(3) as base has proven to be highly efficient in the Heck coupling reactions of aryl bromides (from electron-deficient to electron-rich aryl bromides) with n-butyl acrylate.
authors.affiliation: Department of Chemistry, University of New Orleans, New Orleans, Louisiana 70148, USA.
authors.forename: C
authors.initials: C
authors.lastname: Yang
authors.forename: H M
authors.initials: HM
authors.lastname: Lee
authors.forename: S P
authors.initials: SP
authors.lastname: Nolan