Efficient Synthesis, Antimicrobial, Antioxidant Assessments and Geometric Optimization Calculations of Azoles- Incorporating Quinoline Moiety

A novel series of Schiff bases, hydrazide, and hydrazine derivatives containing quinoline moiety were synthesized via condensation of 3-substituted quinolines 1a and 1b with different aromatic amines or hydrazines. Furthermore, various heterocyclic ring systems: 1,3,4-thiadiazole, thiazolidin-4-one, 2-thioxo-imidazolidin-4-one, and thiazole derivatives 10-13 were synthesized by refluxing hydrazinecarbothioamide derivative 9 with different acetic acid derivatives. Theoretical calculation of the title compounds were carried out using density functional theory method. The geometrical optimization of the prepared target compounds was theoretically analyzed. The synthesized compounds were examined for their antimicrobial and antioxidant activities. The obtained results revealed clearly that compounds 8 and 13 displayed promising activity as an antimicrobial activity and compounds 3, 5, 6, 7, and 9 exhibited better radical scavenging ability.