نتایج جستجو برای: nmr and el_tofms
تعداد نتایج: 16839182 فیلتر نتایج به سال:
A new derivative of Cyclotriphosphazene with xanthydrol as the oxygen-containing ligand was synthesized. Firstly Hexaclorocyclotriphosphazene was obtained Hexaclorocyclotriphosphazene from ammonium chloride and phosphorus pentachloride reaction and then the deprotonated xanthydrol was reacted with Hexaclorocyclotriphosphazene in the ratio of 6:1 in dry toluene as the solve...
A novel Brønsted acidic ionic liquid namely N1,N1,N2,N2-tetramethyl-N1,N2-bis(sulfo)ethane-1,2-diaminium trifluoroacetate {[TMBSED][TFA]2} was synthesized, and characterized by studying its1H NMR, 13C NMR, 19F NMR and mass spectral data. Afterward, the ionic liquid was applied ascatalyst for the production of polyhydroquinoline derivatives via the one-pot multi-componentreaction of arylaldehyde...
A green and convenient protocol is described for the preparation of 1-(alkylamino)-3-(1,3-dioxoisoindolin-2-yl)-2-methyl-1-oxopropan-2-yl benzoates via one-pot three-component reaction between 2-(2-oxopropyl)isoindoline-1,3-dione, an alkyl isocyanide and an aromatic carboxylic acid in water at room temperature. The methods used to follow the reactions are TLC and NMR, which indicated that there...
The ethyl acetate partition of dried methanolic extract of aerial parts of Euphorbia microsciadia (Euphorbiaceae) afforded three pentacyclic triterpenes, betulinic acid (1) from lupane type, oleanolic acid (2) from oleane type and ursolic acid (3) from ursane type triterpenes that are reported for the first time in this plant. These three compounds were structurally compared through their mass ...
Three-component reactions have emerged as useful methods because the combinationof three components to generate new products in a single step is extremely economical,among the multi-component reactions. A green, simple, efficient, and cost-effective procedure has been carried out by the synthesis of dihydropyrimidinonesin Biginelli’s condensation of ethyl cyanoacetate, aldehyde and urea or thio...
The complexes [MoS (CUNCS) ] w hen x = 2,3,4 and [MoOS , (CUNCS) ] when y = 2, 3 have been prepared by the reaction of CuSCN with [P(C H ) ] [MoS ] or [P(C H ) ] [MOOS ] in dry degassed acetone or DMFsolution and recrystallized from dichloromethane, the attempted preparation of [MoS (AgSCN) ] and [MOOS (AgSCN) ] failed. The Raman, IR, UV/VIS, C-nmr and Mo-nmr spectra of the co...
A new series of N-[2-(1H-1,2,3-benzotriazol-1-yl)ethyl]-4-(substitutedphenyl)-3-chloro-2-oxo-1-iminoazetidine, compounds 4(a-j) were synthesized. The structures of all the synthesized compounds were confirmed by chemical and spectral analyses such as IR, 1H NMR, 13C NMR and FAB-Mass. The compounds 4(a-j) were screened for their antibacterial, antifungal and antitubercular activities and gave ac...
regioselective synthesis of highly functionalized pyranopyrazoles was achieved in excellent yield from phenyl pyrazolone, substituted aromatic aldehyde with nitroketene-n,s-acetal in the presence of indium trichloride as a versatile catalyst under reflux condition in ethanol-water mixture. all reactions preceeded within a short period of time with excellent purity. all of the synthesized compou...
آنیلین یکی از ترکیبات حلقوی آمینی نوع اول است که در صنایع مختلفی مانند داروسازی، رنگ سازی، پلاستیک سازی و پتروشیمی کاربرد دارد. این ماده سمّی بوده و تخلیه آن به محیط، آثار زیان باری در بر خواهد داشت. لذا استفاده از سیستم مناسب تصفیه، امری ضروری است. در این تحقیق به منظور بررسی کارایی سیستم rbc در حذف آنیلین از چهار سیستم موازی (دو مجموعه سری) به حجم هر یک 3 لیتر استفاده شد. دو راکتور سری اول حاو...
influence of aluminum, gallium, indium- doping on the boron-nitride nanotubes (bnnts) investigated with density functional theory (dft) and hartreefock (hf) methods. for this purpose, the chemical shift of difference atomic nucleus was studied using the gauge included atomic orbital (giao) approch. in the following, structural parameter values, electrostatic potential, thermodynamic parameters,...
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