Synthesis and Antimicrobial Activity of Some Novel Quinoline,Chromene, Pyrazole Derivatives Bearing Triazolopyrimidine Moiety

7‐Amino‐3‐phenyl‐[1,2,4]triazolo [4,3‐a] pyrimidin‐5(1H )‐one ( 5 ) was utilized as key intermediate for the synthesis of some new, quinolines 9 , 10 , 11 , 12 , 13 , 14 and 18 , 19 , 20 , acrylonitrile 25 and 28 , coumarin 26 , and pyrazoles 31 , 32 , 33 , 34 incorporating triazolopyrimidines. The structures of the newly synthesized compounds were confirmed by elemental analysis, IR, ¹H NMR, and mass spectral data. Representative compounds of the synthesized products were tested and evaluated as antimicrobial. Compounds 25 , 28 , 31 , 32 , 33 , and 34 are the most promising.