Ara
Toplam kayıt 22, listelenen: 11-20
Determination of the protonation constants of some 4-(substituted benzylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones by the potentiometric method in ethanol-water mixtures
(2007)
To gain more information about the effect of solvent on 4,5-dihydro-1H-1,2,4-triazol-5-ones, the stoichiometric protonation constants of thirteen triazoles in ethanol-water mixtures were determined at an ionic strength of ...
Studies on the protonation constants of some triazoles in ethanol-water mixtures
(Chemical Publishing Co., 2008)
Several studies, involving the formation and investigation of biological activities of some triazoles derivatives. These derivatives have weak acidic properties. To gain more information about the effect of solvent on ...
Determination of the protonation constants of triazole derivatives in non-aqueous solvents
(2009)
Different 17 triazole derivatives were titrated with tetrabutylammonium hydroxide in four non-aqueous solvents (isopropyl alcohol, rert-butyl alcohol, N,N-dimethylformamide and acetonitrile), using Potentiometric method. ...
Synthesis of 1,2,4-Triazole derivatives and determination of protonation constant
(2009)
A microwave irradiation method has been developed for the synhesis of some 1,2,4-triazole derivatives using environmentally benign solvent ethanol in open vessels. Twelve 1,2,4-triazole derivatives were synthesized in good ...
Microwave-assisted synthesis of novel 2,4-dihydro-5-[4-(trifluoromethyl) phenyl]-3h-1,2,4-triazol-3-ones and potentiometric determination of their pKa in nonaqueous solvents
(Wiley, 2010)
The novel 4-amino- or 4-aryl-substituted 2,4-dihydro-5-[(4-trifluoromethyl) phenyl]-3H-1,2,4-triazol-3-ones 3a-3g were synthesized by reaction of N-(ethoxycarbonyl)-4-(trifluoromethyl)benzenehydrazonic acid ethyl ester (2) ...
Synthesis of novel triazol compounds containing isatin as potential antibacterial and antifungal agents by microwave and conventional methods
(Sage Publishing, 2011)
Microwave irradiation has been used to accelerate the conversion of isatin (1a) and 5-nitroisatin (1b) into their Schiff bases 3-[5?-aryl(alkyl)- 2?,4?-dihydro-1?,2?,4?-triazol-3?-on- 4?-yl]iminoisatin (3a-g) and ...
Determination of protonation constants of some 3-alkyl(aryl)-4-(ptert- butyl(benzyl/benzyliden)amino)-4,5-dihydro-1H-1,2,4-triazole-5- one deriveatives with spectrophotometric method
(2011)
The protonation constant values of different twelve 3-alkyl(aryl)-4-(p-t-butyl(benzyl/ benzyliden)amino)-4,5-dihydro-1H-1,2,4-triazole-5-one derivatives have been determined in ethanol %50 - water %50 mixtures by ...
Microwave-assisted synthesis of some new benzylidenamino compounds and potentiometric determination of their pKa
(2012)
A growing body of literature has shown the effectiveness of using microwaves in chemical reactions. The aim of this study is to demonstrate a rapid and highly efficient synthesis of some new benzylidenamino compounds (4a-f) ...
In vitro antioxidant and acidic properties of novel 4-(5-Methyl- 24hienylmethyleneamino)-4,5-dihydro-1H-l,2,4-triazol-5one derivatives. Synthesis and characterization
(Syscom 18 SRL, 2012)
In the present study 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-l,2,4-triazol-5- ones 2a-i reacted with 5-methylthiophene-2-carboxyaldehyde to afford the corresponding compounds 3a-i and the acetylation reactions of compounds ...
Microwave-assisted synthesis of some 1, 2, 4-triazol-3-ones and potentiometric determination of their pKa in amfiprotic and dipolar aprotic-water mixtures
(0-Belirlenecek, 2013)
The novel 5-alkyl(aryl)-4-(aryl)-2, 4-dihydro-3H-1, 2, 4-triazol-3-ones (1-12) were synthesized by reaction of (N?-ethoxycarbonyl)-4-alkyl(aryl)hydrazonic acid ethyl ester with primary amines by microwave irradiation. ...