Abstract
The quinolinylcyclopalladated complexes 3a– b were synthesised in good yields (81% and 77%) by the insertion reaction of the prepared dinuclear palladium complexes [Pd( C,N-2-C 9H 4N-CHO-3-R-6)Cl(PPh 3)] 2 [(R = H ( 2a), R = OMe ( 2b)] with isonitrile XyNC (Xy = 2,6-Me 2C 6H 3). The cyclopalladated complexes 3a– b were also obtained in low yields (39% and 33.5%) via a one pot oxidative addition reaction of quinoline chloride 1a– b with isonitrile XyNC:Pd(dba) 2 (4:1). The reactions of 3a– b with Tl(TfO) (TfO = triflate, CF 3SO 3) in the presence of H 2O or EtOH causes depalladation reactions of the complexes to provide the corresponding organic compounds 4a– b, 5a– b and 6a– b in yields (41%, 27% and 18–19%). The products were characterized by satisfactory elemental analyses and spectral studies (IR, 1H, 13C and 31P NMR). The crystal structures of 2a, 3a and 3b were determined by X-ray diffraction studies.
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