نتایج جستجو برای: tetrazoles

تعداد نتایج: 236  

ژورنال: مواد پرانرژی 2014

Tetrazoles and their derivatives are insensitive energetic molecules that can be used in the compounding of the high energy material. Herein, two types of bis hyroxyethyl tetrazole compounds have been synthesized using bisnitrile and sodium azide and via consequent alkylation of the reaction product .The structure of all products have been confirmed by 1HNMR, MASS spectroscopy and elemental...

Journal: :Inorganic chemistry 2001
C Yélamos K R Gust A G Baboul M J Heeg H B Schlegel C H Winter

Several early transition metal complexes bearing 1,2,4-triazolato and tetrazolato ligands have been prepared by reaction of the pyrazolato complexes Ti(tBu(2)pz)(4-x)Cl(x) (tBu(2)pz = 3,5-di-tert-butylpyrazolato; x = 1, 2) and M(tBu(2)pz)(5-x)Cl(x) (M = Nb, Ta: x = 2, 3) with the sodium or potassium salts derived from 1,2,4-triazoles and tetrazoles. The X-ray structure analysis of Ti(tBu(2)pz)(...

Journal: :The Journal of organic chemistry 2008
Richard N Butler John M Hanniffy John C Stephens Luke A Burke

The reaction of cerium(IV) ammonium nitrate (CAN) with a range of N-(p-anisyl)azoles in acetonitrile or methanol solvents leads to N-dearylation releasing the parent NH-azole and p-benzoquinone in comparable yields. The scope and limitations of the reaction are explored. It was successful with 1-(p-anisyl)pyrazoles, 2-(p-anisyl)-1,2,3-triazoles, 2-(p-anisyl)-2H-tetrazoles, and 1-(p-anisyl)penta...

Journal: :Chemical & pharmaceutical bulletin 2002
Yu Momose Tsuyoshi Maekawa Hiroyuki Odaka Hitoshi Ikeda Takashi Sohda

A series of 5-(4-alkoxyphenylalkyl)-1H-tetrazole derivatives, containing an oxazole-based group at the alkoxy moiety, was prepared and their antidiabetic effects were evaluated in two genetically obese and diabetic animal models, KKAy mice and Wistar fatty rats. Syntheses were performed by cyclization of the corresponding nitrites reacting with azide compounds. A large number of the 5-(4-alkoxy...

Journal: :The Journal of organic chemistry 2013
Tatyana S Shestakova Zakhar O Shenkarev Sergey L Deev Oleg N Chupakhin Igor A Khalymbadzha Vladimir L Rusinov Alexander S Arseniev

The selectively (15)N labeled azido-1,2,4-triazine 2*A and azidopyrimidine 4*A were synthesized by treating hydrazinoazines with (15)N-labeled nitrous acid. The synthesized compounds were studied by (1)H, (13)C, and (15)N NMR spectroscopy in DMSO, TFA, and DMSO/TFA solutions, where the azide-tetrazole equilibrium could lead to the formation of two tetrazoles (T, T') and one azide (A) isomer for...

Journal: :Journal of bacteriology 1953
N L SOMERSON H E MORTON

Tetrazolium salts have proved useful as indicators of electron transfer. Compounds such as triphenyltetrazolium chloride' are more practical than indicators like methylene blue since they are converted from a soluble colorless salt to an insoluble formazan in the reduced state. They also provide similar convenience in detecting enzymatic activity and specific sites of such activity (Bielig, Kau...

2013
Islam H. El Azab Fawi M. Abd El Latif

Starting from 2-imino-N-phenyl-2H-chromene-3-carbox-amide, (1) a series of functionalized chromenes were achieved; such as, 2-ethoxy-2,3-dihydro-3-phenylchromeno[2,3-d]pyrimidin-4-one (2), and 2-hydrazinyl-2,3-dihydro-3-phenylchromeno-[2,3-d]pyrimidin-4-one (3). Furthermore, reactions of (3) with some of laboratory available compounds gave pyrazoles (4 9, 12, 13a, 13b), tetrazoles (11), 2-(2-be...

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