XXIV.—Studies in substituted quaternary azonium compounds containing an asymmetric nitrogen atom. Part IV. Additive compounds of thiocarbamide with azonium iodides

Cv. the Azine and Azonium Compounds of the Proteolytic Enzymes

THE immense importance of the establishment of the chemical nature of the proteolytic enzymes has led to many endeavours to purify them. From the earliest attempts of Schwann [1836] to the present day all these have met with obvious failure. In 1905 it was observed by T. Brailsford Robertson [1907] that if one drop of saturated safranine (Griibler) is added to a solution of trypsin (Griibler) a...

ORGANIC CHEMISTRY Organic Compounds containing Nitrogen

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

A Mini Review: Biological Significances of Nitrogen Hetero Atom Containing Heterocyclic Compounds

Heterocycles have vital interest in the pharmaceuticals and agrochemicals. Synthetic chemistry provides wealth of heterocyclic systems. More than 90% of drugs contain heterocycles ring and the interface between chemistry and biology. Scientific insight, discovery and applications are taking place by heterocyclic compounds. This review article covers theactive heterocycles that have shown consid...

Synthesis of Some Nitrogen Functional Derivatives of 5-substituted-6-azauracil as Biologically Active Compounds

3-Arylhydrazono-2,4-dioxo-4-phenylbutanoates have been prepared by the coupling of benzoylpyruvate with aryldiazonium chlorides. Reactions of the 3-arylhydrazono-2,4- dioxo-4-phenylbutanoates with 1-aminoguanidine, semicarbazide, and thiosemicarbazide gave 5-substituted 2-imino-6-azauracil (3a), 6-azauracil (3b), and 2-thio-6-azauracil (3c), respectively. The analytical data of these compounds ...