Résumé
Several new pyrazole, pyrazolo [5, 1-c]-1, 2, 4-triazine, pyrimidine and thiazole derivatives were synthesised by the reactions of 2-bromo-1-benzofurylglyoxal-2-[3-phenyl-pyrazol-5-yl]-hydrazone with a variety of reagents. Structures were established by elemental and spectral data
Sujets)
Triazines/composition chimique , Pyrimidines/composition chimique , /composition chimiqueRésumé
The nitrile imine generated by the action of triethylamine on 2-bromo-1-benzofurylglyoxal-2-[3 phenylpyrazol 5-yl]-hydrazone reacted with some Schiff bases, -nitrostyrenes and thiocarboxamidocinnamonitrile derivatives via dipolar cycloaddition reactions to yield several new polyfunctional pyrazole and 1,2,4-triazole derivatives. Structures were confirmed by elemental analysis and spectral data studies
Sujets)
Pyrazoles/analogues et dérivés , Triazoles/synthèse chimique , Nitriles/composition chimique , Imines/composition chimiqueRésumé
Several new pyrrolidino- and pyrrolo-[4, 3-b] furochromone derivatives were synthesized via the dipolar cycloaddition reactions of some styrylfurochromones with N-arylmaleimide and subsequent dehydrogenation. Structures are confirmed by elemental analysis and spectral data studies
Sujets)
Pyrrolidines/synthèse chimique , Pyrroles/synthèse chimique , Pyrrolidines/analogues et dérivés , Pyrroles/analogues et dérivésRésumé
A variety of new pyrazole, pyrrolinopyrazole and pyrazolopyridazine derivatives were synthesised via the dipolar cycloaddition reactions of acrylonitrile, ethyl acrylate and N-arylmaleimides with the nitrile imine regenerated from 2-bromo-1- benzofurylglyoxal-2-[3-phenylpyrazol-5-yl]-hydrazone. Structure of the newly synthesized derivatives were established on the basis of elemental analysis and spectral data