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Quantum chemical studies on tautomerism and basicity behavior of some 1,2,4-triazole derivatives
tautomerism acidity constant nucleophilicity
2010/12/29
The acidity constants, relative stabilities, and tautomeric equilibrium constants of some 1,2,4-triazole derivatives were determined using the density functional theory (DFT) with the B3LYP method and...
Computational study on nitronium squarate - potential oxidizers for solid rocket propulsion?
Ammonium perchlorate combustion, nitronium squaric acid oxidizers
2010/12/29
The enthalpies of formation for solid ionic nitronium squarate, [NO2]2[C4O4], and covalent squaric acid dinitrate ester, O2N-C4O4-NO2, were calculated using the complete basis set (CBS-4M) method of P...
Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen ad...
Determination of ceftriaxone, ceftizoxime, paracetamol, and diclofenac sodium by capillary zone electrophoresis in pharmaceutical formulations and in human blood serum
Capillary zone electrophoresis paracetamol ceftriaxone
2010/12/29
A simple and fairly fast capillary zone electrophoresis method has been developed for the determination and separation of ceftriaxone, ceftizoxime, paracetamol, and diclofenac sodium in a mixture, in ...
Synthesis and surfactant properties of N-acylation compounds derived from hydrolysis degradation products of N-(b-cianoethyl)-e-caprolactam
N-acylation surfactants 4-azasebacic acid N-(b -cianoethyl)-e -caprolactam
2010/12/29
N-acyl amino acids can be used as active surface agents in the detergents industry, as well as in the pharmaceutical industry and cosmetics. Properties of these compounds are superior to those of fatt...
An efficient and green approach for the synthesis of vinyl aryl ethers in the presence of guanidine hydrochloride
Guanidine hydrochloride dialkyl acetylenedicarboxylates vinyl aryl ether
2010/12/29
A stereoselective procedure for vinyl aryl ether bond formation by direct coupling of dialkyl acetylenedicarboxylates and substituted phenols or naphthols under mild reaction conditions has been devel...
Reactions of 4-benzoyl-1,5-diphenyl-1H-pyrazole-3- carboxylic acid chloride with various hydroxylamines and carbazates
Pyrazole-3-carboxylic acid nucleophilic substitution furan-2,3-dione
2010/12/29
The 1H-pyrazole-3-carboxylic acid 2 was converted via reactions of its acid chloride 3 with various hydroxylamine 4a-f and carbazate derivatives 8a-c into the corresponding novel N-substituted-4-benzo...
Ethyl 5-oxo-3-arylamino-2,5-dihydroisoxazole-4- carboxylates as sources of imidazopyrimidine and aminoindole derivatives
Isoxazolones 2-chloropyrimidine 2-chlorobenzoxazole
2010/12/29
The reaction of ethyl 5-oxo-3-arylamino-2,5-dihydroisoxazole-4- carboxylates with 2-chloropyrimidine and 2-chlorobenzoxazole gave the corresponding isoxazolones with pyrimidine and benzoxazole rings s...
Synthesis and antimicrobial activities of some new 1,2,4-triazole derivatives
1,3,4-Thiadiazole 1,2,4-triazole carbamate
2010/12/29
The synthesis of ethyl [3-(cyanomethyl)-5-alkyl-4H-1,2,4-triazol- 4-yl]carbamates (2a-d) was performed starting from ethyl 2-[ethoxy(4- (aryl)methylene]hydrazinecarboxylates (1a, 1b). The treatment of...
N,N‘-二硝基-N，N′-二（3-（[1,2,3]-三唑并-[4,5-c-呋咱-4,5-内盐-5-基）呋咱-4-基）二氨基甲烷的合成与表征
有机化学 N N‘-二硝基-N N′-二（3-（[1 2 3]-三唑并-[4 5-c-呋咱-4 5-内盐-5-基）呋咱-4-基）二氨基甲烷 硝化反应 MNOTO MAOTO
2014/3/6
以二氨基呋咱（DAF）为起始原料，经Caros acid氧化、锌粉还原、环化、缩合和硝化五步反应得到N,N‘-二硝基-N，N′-二（3-（[1,2,3]-三唑并-[4,5-c-呋咱-4,5-内盐-5-基）呋咱-4-基）二氨基甲烷(MNOTO)，总收率为32.7%（以DAF计）。用元素分析、核磁共振、红外光谱等进行了结构表征。用浓硝酸和醋酐作为硝化体系硝化N，N′-二（3-（[1,2,3]-三唑并...
Quantum chemical studies on tautomerism and basicity behavior of some 1,2,4-triazole derivatives
1,2,4-Triazole proton affinity tautomerism acidity constant nucleophilicity
2010/12/20
The acidity constants, relative stabilities, and tautomeric equilibrium constants of some 1,2,4-triazole derivatives were determined using the density functional theory (DFT) with the B3LYP method and...
Comparative essential oil analysis of Geranium sylvaticum extracted by hydrodistillation and microwave distillation
Geranium sylvaticum Geraniaceae hydrodistillation microwave distillation essential oil GC-FID GC-MS
2010/12/20
The essential oil of Geranium sylvaticum L. (Geraniaceae) was isolated by hydrodistillation (HD) and microwave distillation (MD). The composition of the volatile oils was characterized by GC-FID and G...
Computational study on nitronium squarate - potential oxidizers for solid rocket propulsion?
Ammonium perchlorate combustion nitronium squaric acid oxidizers specific impulse rocket propellants
2010/12/20
The enthalpies of formation for solid ionic nitronium squarate, [NO2]2[C4O4], and covalent squaric acid dinitrate ester, O2N-C4O4-NO2, were calculated using the complete basis set (CBS-4M) method of P...
Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen ad...
Determination of trace element contents of Thymus species from Turkey
Thymus species trace elements minerals atomic absorption spectrometry microwave digestion
2010/12/20
Eleven mineral and trace elements (Mg, Ca, K, Fe, Mn, Al, Zn, Cu, Cd, Ni, and Pb) were determined in the Thymus species growing in Turkey. The total concentrations were measured in samples mineralized...