Synthesis of Palladium complexes derived from Amido linked N‐Heterocyclic Carbenes and their use in Suzuki cross coupling reactions

Treatment of 1-(n-butyl)-3-N-(2-Ar)acetamido-1, 3-imidazolium chloride (Ar=furylmethyl,phenylmethyl) with excess K2CO3 and [PdCl2(L−L)] (L−L=2 PPh3, dppf) afforded orange compounds composition [(1-(n-butyl)-3-N-(2-Ar)acetamido-1,3-imidazol-2-ylidene)]2Pd (Ar=furylmethyl; phenylmethyl). These complexes were characterized by NMR (1H 13C{1H} NMR), IR micro-analysis data. Subsequently, the catalytic efficiency these for cross coupling reactions between 4-haloarenens (halo=Br, I) phenylboronic acid was studied under different solvents (acetonitrile, THF DMF), temperatures catalyst loadings. The molecular structure [(1-(n-butyl)-3-N-(2-furylmethyl)acetamido-1, 3-imidazol-2-ylidene)]2Pd established single crystal X-ray diffraction analysis.