this work, we sought to identify novel NPFF receptors ligands by focusing our interest in a series of heterocycles as rigidified nonpeptide NPFF receptor ligands, starting from already described aminoguanidine hydrazones (AGHs). Binding experiments and functional assays highlighted AGH 1n and its rigidified analogue 2-amino-dihydropyrimidine 22e for in vivo experiments. As shown earlier with the prototypical
base ligand of bis-(2-hydroxybenzaldehyde)-S-ethylisothiosemicarbazone and its U(VI) complex have been prepared. Their structures were fully characterized by elemental analysis, FT-IR, molar conductivity, UV–Vis and 1H NMR methods. X-ray diffraction has been used to determine the molecular structure of the uranium complex. The Schiff base complex was found to be pentagonal bipyramidal. The N2O2 donor
Indukumari, P. V.; Joshua, C. P.; Rajan, V. P., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 5, p. 384 - 387