Gd. Kalayanov et al., SYNTHESIS OF PYRAZOLOQUINOLINES AS GASTRIC H+ K+-ATPASE INHIBITORS/, Bulletin of the Korean Chemical Society, 19(6), 1998, pp. 667-671
A series of l-aryl-1H-pyrazolo[4,3-c]quinolines and 2-aryl-2H-pyrazolo
[4,3-c]quinolines are prepared by reacting 3-acyl-4-chloroquinolines i
n ethanol or 3-acyl-4(1H)-quinolone in acetic acid with appropriate hy
drazines as possible anti-ulcer agents. A regiospecific synthesis of l
-aryl-1H-pyrazolo[4,3-c]quinolines is also achieved. The central pyrid
ine ring could be easily reduced by catalytic hydrogenation.