The chemistry of 2-oxo-1,2,3,4-tetrahydropyrimidines began to develop toward the end of 1893 year, when the first representatives of this class compounds were reported by P. Biginelli. Despite prior reports of several really effective catalytic and non-catalytic approaches towards Biginelli-type products, an overwhelming number of new catalysts for the Biginelli reaction have been recently publ...

Bis(thiosemicarbazones) and their copper (Cu) complexes possess unique anti-neoplastic properties. However, their mechanism of action remains unclear. We examined the structure-activity relationships of twelve bis(thiosemicarbazones) to elucidate factors regarding their anti-cancer efficacy. Importantly, the alkyl substitutions at the diimine position of the ligand backbone resulted in two dist...

Oneand two-dimensional NMR spectroscopy were employed to determine the conformation of 2,3,4,6,2',3'-hexaO-acetyl-4-O-a-D-glucopyranosyl-1',6'-anhydro-~-D-glucop~anose in acetone-d, solution. Inter-residue interproton distances, H-1-H-4' and H-1-H-Q', determined by 2D NOE experiments are commensurate with torsional angles + and $ of 10" and -20", and also of 10" and -No, about the inter-residue...

Macrocyclic Schiff base ligands (HDAA) and (EDAA) have been synthesized by condensation of Hydrazinedihydrochloride and Ethylenediamine with acetyl acetone respectively in 1:1 molar ratio in ethanolic solution. Further the vanadium complexes were synthesized by refluxing ligands with [VO(acac)2] in1:1 molar ratio in ethanolic medium. The microanalytical analysis have been obtained and UV, IR, H...

The syntheses of 2,6-bis(4-chloropyrazol-1-yl)pyridine (L1), 2,6-bis(4-bromopyrazol-1-yl)pyridine (L2) and 2,6-bis(4-iodopyrazol-1-yl)pyridine (L3) by electrophilic halogenation of 2,6-bis(pyrazol-1-yl)pyridine are reported. The complex [Fe(L1)2][BF4]2 crystallises in two different solvent-free polymorphs. The tetragonal (alpha) form crystallises in a known version of the "terpyridine embrace" ...

A new solvothermal method for the synthesis of thiol-protected silver nanoparticles starting from silver thiolates is reported. The method has been tried with thiols of different chain length, such as octane and octadecane thiols, and the particle size was found to be nearly the same for both molecules. The synthesis was dependent on heating conditions and the best results were obtained when th...

ABTRACT The macrocyclic ligands are synthesized by taking etylenediamine and semicarbazide hydrochloride with acetyl acetone respectively in ethanolic medium further their Oxovanadium complexes were synthesized by taking metal salt of type VO (acac)2. Ligands and complexes have been analysed for their physical properties with the help of melting point, molecular weight, conductance , TLC determ...