Synthesis of new 2-[1(2H)-phthalazinon-2-yl]-acetamide and 3-[1(2H)-phthalazinon-2-yl]-propanamide derivatives as antinociceptive and anti-inflammatory agents

As a consequence of our ongoing studies on heterocyclic compounds for new antinociceptive and anti-inflammatory agents bearing lactam functional group, new 2-[1(2H)-phthalazinon-2-yl]acetamide and 3-[1(2H)-phthalazinon-2-yl]propanamide derivatives have been synthesized. Among the compounds synthesized, compound 4e was found the most active derivative in terms of antinociceptive and anti-inflammatory activities, without gastric lesions and bleeding at the given dose.