Aryl hydrazine and hydrazide analogues were synthesized based on p-tolyl hydrazine, isolated as a breakdown product of a secondary metabolite from the mushroom, Agaricus bisporus, and tested to be highly active molecule than 5-fluorouracil in in vitro anticancer studies. The synthesized analogues were tested for anticancer activity using NCI protocol. Anolgues 12 and 15 emerged as molecules wit...

Effect of isoniazid (INH) and its metabolites e.g. mono and diacetyl hydrazines (MAH and DAH respectively) was studied on circulating and tissue folates in mice (a species susceptible to INH tumorigenicity) and rats (a species resistant to INH carcinogenicity). It was observed that ip injection of INH, MAH and mydrazine sulfate (HS, 0.18 mg/g) decreased blood folates in mice while only HS and M...

An efficient, highly atom economic synthesis of hitherto unknown spirocyclic pyrazolidines in a one-pot process was developed. The gold-catalyzed three-component coupling of alkynols, hydrazines and aldehydes or ketones likely proceeds via cycloisomerization of the alkynol to an exocyclic enol ether and subsequent [3 + 2]-cycloaddition of an azomethine ylide. A library of 29 derivatives with a ...

New pyrimido [4, 5-e] [1, 3, 4]thia- diazin-7-yl] hydrazines were synthesized via the cyclocondensation of alkyl-2-phenylhydrazinecarbodithioates as a binucleophile with 5-bromo-2,4-dichloro-6-methylpyrimidine as a bielectrophile , and replacement of C-7 chloro atom by hydrazine in ethanol as the solvent . This method has advantages over methods currently described in the literature for the con...

The aim of this paper is to emphasize the studies carried out for the new generation of hydrazine pump s, in terms of modeling, control and experiments in order to optimize the use of gas. It consists of an actuator conception for which it is possible to move the hydrazine pump leading to very short required displacements. It may be shown that the main advantage in using these new devices is th...

The title compound, C(16)H(16)N(2)O(4), was obtained from the reaction of hydrazine hydrate and o-vanilin in absolute ethanol. The mol-ecule is almost planar (except for the methyl H atoms), with a mean deviation from the plane of 0.0259 Å. The mol-ecular structure also exhibits an approximate non-crystallographic twofold axis. Intra-molecular O-H⋯N hydrogen bonds occur. In the crystal, inter-m...

Diazocoupling reaction of curcumin with different diazonium salts of p-toluidine, 2-aminopyridine, and 4-aminoantipyrine in pyridine yielded the arylhydrazones 2a-c. Arylhydrazone of p-toluidine reacted with urea, thiourea, and guanidine nitrate to produce 5,6-dihydropyrimidines. Further reaction of 2a with 2,3-diaminopyrdine in sodium ethoxide solution yielded 1H-pyrido[2,3-b][1,4]diazepine de...

The title compound, C(9)H(11)N(3)O, was synthesized by the reaction of 4-methyl-benzaldehyde with semicarbazide. The mol-ecule adopts an E configuration about the central C=N double bond and the dihedral angle between the mean planes of the benzene ring and the carboxamide groups is 17.05 (9)°. The hydrazine N atoms are twisted slightly out of the plane of the carboxamide group [C-C-N-N torsion...

The origins of the line—shape method for determining the rates of chemical and conformational equilibration by NMR spectroscopy are reviewed for the purpose of illustrating the factors which should be considered in obtaining accurate rate data by this very useful technique. Besides a number of illustrations of how changes in rates of conformational equilibration change NMR spectra taken from th...