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821.291  Articles
1 of 82.130 pages  |  10  records  |  more records»
A series of tetrasubstituted pyrazole-3-carboxamides (3a–c) and pyr­azole-3-carbonyl thioureides (6a–c) were synthesized and their structures char­ac­terized by IR, NMR and elemental analysis. The antibacterial potential against specific Gram-positive and... see more

Conclusions. It has been found that the reactions of 1,3-diaryl substituted pyrazole-4-carbaldehydes with 3-methyl-5-aminopyrazole and 2,2-dimethyl-1,3-dioxane-4,6-dione are regioselective and lead to the formation of pyrazolo[3,4-b]pyridone systems. This... see more

Pyrimidines, sulphonamides and carboxamides have shown a large number of pharmacological properties against different types of diseases inc­luding helminthiasis. Seventeen new pyrimidine derivatives bearing sulphon­amide and carboxamide were synthesized a... see more

Two series of new 3,5-disubstituted-pyrazole-1-carbothioamides (4a-f and 5a-e) were designed and synthesized through condensation reaction between chalcones and thiosemicarbazides under alkaline condition via cyclocondensation reaction. The structures hav... see more

A number of the quaternary ammonium salts previously unknown with polyfunctional pyrazole base have been obtained. The structure of these pyrazoles contains highly polar ammonium, ureide and hydroxymethyl groups. The compounds under study were synthesized... see more

The reaction of 4-nitro-3-pyrazolecarboxylic acid and Cu(OAc)2×H2O in ethanol resulted in a new coordination compound [Cu2(4-nitro-3-pzc)2(H2O)6]2H2O (4nitro-3pzc = 4-nitro-3-pyrazolecarboxylate). The com­pound was investigated by means of single-crystal ... see more

The scientific publications devoted to chemistry of the synthetically promising bifunctional derivatives of pyrazole – esters of 4-formylepyrazole-3-carbonic acids have been generalized and systematized. A special attention has been given to description o... see more

A new series of 6-[3-aryl-1-phenyl-4',5'-dihydro[4,5'-bi-1H-pyrazol]-3'- -yl]-2H-chromen-5-ol derivatives was synthesized by Michael addition of chal­cones 5a–j with hydrazine hydrate in presence of sodium acetate under con­ventional heating and microwave... see more

A new series of (E)-3-(3-(4-substituted phenyl)-1-phenyl-1H-pyr­azol-4-yl)-1-(2-hydroxy-4-((1-aryl-1H-1-2,3-triazol-4-yl)methoxy)phenyl)­prop-2-en-1-one derivatives was synthesized. The synthesis of the title com­pounds involved the 1,3-dipolar Cu(I)-cata... see more

1 of 82.130 pages  |  10  records  |  more records»