A novel ring transformation/desulfurization of substituted 2-methyl-1,2,4-thiadiazolium salts 2 provides a versatile entry to imidazoles 3 with a variety of substituents. Simple one-pot procedures combine the preparation of starting 1,2,4-thiadiazolium salts 2 from N-(thiocarbonyl)-N'-methylamidines 1 or 1,2,4-dithiazolium triiodides 6 with the ring transformation/desulfurization to the imidazoles 3. Alternatively, N-(thiacarbonyl)-N'-methylamidines 1 can be transformed to imidazoles 3 or to 1-substituted imidazoles 5 via S-methylation and elimination of methylthiol. In the same manner, a new entry to 4H-imidazoles 8 could be developed.
Synthesis and characterisation of mixed-ligand platinum(II)–sulfoxide complexes, [PtCl(DMSO)(L)], for potential use as chemotherapeutic agents (HL=N,N-dialkyl-N′-(3-R-benzoyl)thiourea)
作者:C Sacht、M.S Datt
DOI:10.1016/s0277-5387(00)00419-8
日期:2000.6
mixed-ligand platinum(II) complexes of the type [PtCl(DMSO)(L)], where HL=N,N-diethyl-N′-(3-R-benzoyl)thiourea, N,N-di(2-hydroxyethyl)-N′-(3-R-benzoyl)thiourea or N-morpholino-N′-(3-R-benzoyl)thiourea (R=H, Cl, NO2, CH3O, CH3), have been synthesised and characterised by elemental analysis, IR spectroscopy and 1H and 195Pt NMR spectroscopy. The spectroscopic data are consistent with the complexes containing
—A series of N-morpholine or N,N-diethyl, N'-substituted benzoylthioureas (R = Cl, Br, OMe or NO2 in ortho-, meta- or para-position) has been synthesized by condensation of morpholine or diethylamine with substituted benzoyl isothiocyanates. NMR spectra and magnetic measurements have shown square-planar NiL2 and fac-CoL3 complexes. The influence of the different substituents on the NMR and electronic