353273-45-7Relevant academic research and scientific papers
Synthesis of new pyrazolo[3,4-b]quinolines, thieno[2,3-b]quinolines and related condensed heterocyclic systems
Bakhite, Etify Abdel-Ghafar
, p. 1175 - 1183 (2007/10/03)
3-Amino-l H-pyrazolo[3,4-b]quinoline (2) was reacted with benzaldehyde, acetylacetone, ethyl aceto-acetate and/or phenyl isothiocyanate to give compounds 3,4,5 and 6, respectively. The interaction of 6 with some α-haloesters and/or α-haloketones produced the corresponding thiazolidinones 7a-c and thiazolines 9a-d. lH-Pyrazolo[3,4-b]quinoline-3-diazonium chloride (11) was coupled with some active methylene compounds to give the corresponding hydrazono compounds 12a, b and 13 which, in turn were cyclized into the corresponding triazinopyrazoloquinolines 14a,b and 15 by heating in acetic acid. 3-Aminothieno[2,3-b]quinoline-2-carbohydrazide (19) and 3-amino-2-(1H-benzimidazol-2-yl)thieno[2,3-b]quinoline (21) were prepared and employed as key intermediates for synthesizing the second class of the title compounds.
Synthesis and antimicrobial activity of novel pyrazolo[3,4-b]quinoline derivatives
El-Sayed, Ola A.,Aboul-Enein, Hassan Y.
, p. 117 - 120 (2007/10/03)
New pyrazolo[3,4-b]quinoline derivatives have been prepared by cyclization of the intermediate 2-chloroquinoline-3-carbonitrile 7, namely 3-amino-1H-pyrazolo[3,4-b]quinoline 8a, 3-amino-1phenyl/(p-substituted)phenyl/-1H-pyrazolo[3,4-b]-quinoline 8bf. Furthermore, 3-[(3-aryl-4-oxothiazolidin-2-ylidene)amino]1H-pyrazolo[3,4-b]quinolines 11a,b; 3-[(3-aryl-4-oxothiazin-2ylidene)amino]-1H-pyrazolo[3,4-b]quinolines 12a,b and 3-(2aryl-4-oxothiazolidin-3-yl)- 1H-pyrazolo[3,4-b]quinolines 13a,b were synthesized. The antimicrobial activity was evaluated for most of the prepared compounds.
