Editing Heck reaction (section)

==Catalyst and substrates==
The reaction is catalyzed by palladium complexes. Typical catalysts and precatalysts include [[tetrakis(triphenylphosphine)palladium(0)]], [[palladium chloride]], and [[palladium(II) acetate]]. Typical supporting [[ligand]]s are [[triphenylphosphine]], [[phosphinooxazolines|PHOX]], and [[BINAP]]. Typical bases are [[triethylamine]], [[potassium carbonate]], and [[sodium acetate]].

The aryl electrophile can be a halide (Br, Cl) or a triflate as well as [[benzyl]] or [[vinyl group|vinyl]] halides. The alkene must contain at least one sp<sup>2</sup>-C-H bond. Electron-withdrawing substituents enhance the reaction, thus [[acrylate]]s are ideal.<ref>{{OrgSynth | author=Littke, A. F. | author2=Fu, G. C. | year=2005 | title=Heck reactions of aryl chlorides catalyzed by palladium/tri-''tert''-butylphosphine: (''E'')-2-Methyl-3-phenylacryacid butyl ester and (''E'')-4-(2-phenylethenyl)benzonitrile | volume=81 | pages=63 | prep = v81p0063}}</ref>