New C-scorpionate nickel(II) catalyst for Heck C–C coupling under unconventional conditions

Publication date: Available online 1 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Inês A.S. Matias, Ana P.C. Ribeiro, Luísa M.D.R.S. MartinsAbstractThe new C-scorpionate Ni(II) complex [NiCl{κ3-HC(pz)3}]Cl (pz = pyrazol-1-yl) is the first nickel homoscorpionate tris(pyrazol-1-yl)methane type complex to be applied as catalyst for the Heck–Mizoroki C–C cross coupling. The microwave-assisted reaction of butyl acrylate and 4-halogeno-anisole was efficiently catalysed by the above Ni(II) complex, in ionic liquid medium, yielding the C–C coupling product in good yields. The stability of [NiCl{κ3-HC(pz)3}]Cl in the ionic liquid allowed its recycling and re-use for several consecutive catalytic cycles with preserved activity.Graphical abstract

Source: Journal of Organometallic Chemistry - June 2, 2019 Category: Chemistry Source Type: research