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...

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...

A new precursor 2-(1-cyano-2,2-bis(methylthio)vinyl)benzonitrile has been synthesized by the reaction of 2-cyanomethylbenzonitrile, carbon disulfide and methyl iodide under basic conditions. The reaction of 2-(1-cyano-2,2-bis(methylthio)vinyl)benzonitrile with various functionalized aryl/heteroaryl methyl ketones or acetone under basic conditions afforded 4-amino-3-aroyl/heteroaroyl/acetyl-2-me...

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...

Macrocyclic Schiff bases have been synthesized by the condensation of acetyl acetone with semicarbazide hydrochloride and thiosemicarbazide in presence of methanol. Further, their oxovanadium complexes have been synthesized by using vanadium acetylacetone. The structural assignment of these compounds has been made on the basis of MP, TLC, MW determination, conductivities, elemental analysis and...

The title compound, C(7)H(10)F(6)O(4), was isolated as an unexpected product from a reaction of tantalum(V) methoxide with hexa-fluoro-acetyl-acetone in a methanol solution. The asymmetric unit consists of one half-mol-ecule with the middle C atom lying on a twofold axis. The crystal structure is stabilized by O-H⋯O and an array of C-H⋯F hydrogen-bonding inter-actions. These inter-actions link ...

An acetone powder of cat brain catalyzed the synthesis of two radioactive products when incubated with L-aspartate-14C and acetyl coenzyme A. The products were identified as Nacetyl-aspartic acid and citric acid. A water extract of the powder contained the system that produced citrate-14C, while the residue contained the aspartate N-acetyltransferase activity. The soluble system rather than the...

Earlier studies have shown that Furacinl inhibits the formation of acetyl coenzyme A2 from pyruvate anaerobically (1). Acetone powder preparations of pigeon liver and rat testis were used in the early work. The results suggested that Furacin inhibits reactions mediated by pyruvic oxidase; therefore, further studies were continued with more highly purified preparations of this enzyme from pigeon...