SYNTHESIS AND NON-AQUEUS MEDIUM TITRATIONS OF SOME NEW 3- ALKYL(ARYL)-4-[2-(4-METHOXYBENZOXY)- 3-METHOXY]- BENZYLİDENAMINO-4,5-DIHYDRO-1H-1,2,4-TRIAZOL-5-ONES

Authors : Muzaffer ALKAN, Abdurrahman GÜRBÜZ, Haydar YÜKSEK, Özlem GÜRSOY KOL, Zafer OCAK

Pages : 138-148

View : 55 | Download : 8

Publication Date : 2014-12-31

Article Type : Research Paper

Abstract :In this study, seven new 3-alkylinsert ignore into journalissuearticles values(aryl);-4-[2-insert ignore into journalissuearticles values(4-methoxybenzoxy);-3-methoxy]-benzylidenamino-4,5-dihydro-1H-1,2,4-triazol-5-ones were synthesized from the reactions of 3-alkylinsert ignore into journalissuearticles values(aryl);-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones with 3-methoxy-2-insert ignore into journalissuearticles values(4-methoxybenzoxy);-benzaldehyde, which was obtained from the reaction of 2-hydroxy-3-methoxybenzaldehyde with p-methoxybenzoyl chloride by using triethylamine. The new compounds synthesized were characterized by using 1H-NMR, 13CNMR and UV spectral data. In addition, to investigate the effects of solvents and molecular structure upon acidity, the prepared 3-alkylinsert ignore into journalissuearticles values(aryl);-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones were titrated potentiometrically with tetrabutylammonium hydroxide in four non-aqueous solvents, including acetone, isopropyl alcohol, DMSO and N,N-dimethylformamide. The half-neutralization potential values and the corresponding pKa values were determined for all cases.
Keywords : 3 alkyl aryl, 4, 2 4 methoxybenzoxy, 3 methoxy, benzylidenamino 4 5 dihydro 1H 1 2 4 triazol 5 ones, potentiometric titration

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