Conversion of novel palladacycles into oxopyrrolo[3,4-b]quinolines
摘要:
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-C9H4N-CHO-3-R-6)Cl(PPh3)](2) [(R = H (2a), R = Me (2b)] with isonitrile XyNC (Xy = 2,6-Me2C6H3). 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 TI(TfO) (TfO=triflate, CF3SO3) in the presence of H2O 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, H-1, C-13 and P-31 NMR). The crystal structures of 2a, 3a and 3b were determined by X-ray diffraction studies. (c) 2008 Elsevier Ltd. All rights reserved.
Conversion of novel palladacycles into oxopyrrolo[3,4-b]quinolines
摘要:
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-C9H4N-CHO-3-R-6)Cl(PPh3)](2) [(R = H (2a), R = Me (2b)] with isonitrile XyNC (Xy = 2,6-Me2C6H3). 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 TI(TfO) (TfO=triflate, CF3SO3) in the presence of H2O 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, H-1, C-13 and P-31 NMR). The crystal structures of 2a, 3a and 3b were determined by X-ray diffraction studies. (c) 2008 Elsevier Ltd. All rights reserved.