Baliah, V.; Natarajan, A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. <B> 20, # 9, p. 830
作者:Baliah, V.、Natarajan, A.
DOI:——
日期:——
<i>bis</i>(2-Aryldecahydroquinolin-4-onedithiocarbamato)-metal(II) Complexes: A New Preparative Method and Characterization Along with<sup>13</sup>C and<sup>1</sup>H NMR Decoupling Studies
2-Aryldecahydroquinolin-4-ones, unlike mere piperidines, do not form dithiocarbamic acids on addition of carbon disulphide under alkaline condition. Invariably, xanthates are formed when carbon disulphide is added to the amine in the presence of alcohol. In the present study dithiocarbamato complexes involving 2-aryldecahydroquinolin-4-ones and Ni(II) and Cu(II) metal ions are reported for the first time. The deprotonation of 2-aryldecahydroquinolin-4-ones takes place in a NH3/NH4Cl buffer medium (pH=10) in acetonitrile followed by the addition of carbon disulphide and the corresponding aqueous solution of the metal ion. The isolated complexes were of the formula M(Ldtc)(2); M(II) = Ni(II) and Cu(II), Ldtc = 2-aryldecahydroquinolin-4-onedithiocarbamate anion derivatives. These complexes were characterized by microanalyses, IR, UV, TG and mass spectral studies. A representative nickel(II) complex has also been subjected to an extensive H-1 NMR decoupling study along with C-13 NMR and mass spectral analysis, clearly indicating the manifestation of complexation on the stereochemistry of the bicyclic ring of the ligand frame work. H-1 NMR spectral data indicated the significance of the 'thioureide' structure contribution to the stability of the present set of complexes which is not available from IR studies. The downfield shift of the H-1 NMR signals and the upfield shift of the C(2) carbon in C-13 NMR spectra of the complexes indicates that the heterocyclic ring deviates from the normal chair conformation on complexation.
Bhavani, N.; Natarajan, D., Journal of the Indian Chemical Society, 1993, vol. 70, # 3, p. 259 - 260
作者:Bhavani, N.、Natarajan, D.
DOI:——
日期:——
LE, COZ LINDA;VEYRAT-MARTIN, CHIRSTINE;WARTSKI, LYA;SEYDEN-PENNE, JACQUEL+, J. ORG. CHEM., 55,(1990) N6, C. 4870-4879
The assignments of the proton and carbon signals and conformations of substituted 2‐aryl‐trans‐decahydroquinolin‐4‐ones were determined using a combination of 1H, 13C, COSY and HETCOR spectral data. Analysis of the spectral data reveals that these compounds exist predominantly in twin‐chair conformations with the aryl and alkyl substituents in the equatorial orientation. Introduction of an alkyl group