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1.
Metal-Containing Phthalocyanines Substituted with One Branched Bulky Moiety and Six Alkylthio Groups
Bayır Zehra Altuntaş Merey Şebnur Hamuryudan Esin 《Monatshefte für Chemie / Chemical Monthly》2003,134(7):1027-1031
Summary. Unsymmetrically substituted metal-phthalocyanines composed of three hexylthio groups and one 1-chloro-3,4-dicyano-6-[2-(2-pyridylmethylamino)phenylthio]benzene
moiety was prepared by cyclization of the reactants in the presence of the anhydrous metal salts Zn(CH3COO)2, NiCl2, and CoCl2. The new unsymmetric phthalocyanines are very soluble in common organic solvents. The compounds were characterised by their
elemental analyses, IR, 1H NMR, MS and UV/Vis spectra.
Corresponding author. E-mail: bayir@itu.edu.tr
Received November 27, 2002; accepted (revised) December 2, 2002
Published online May 2, 2003 相似文献
2.
The [Cu(acac)2]‐catalyzed reactions of α,β‐unsaturated carboxamides with dimethyl diazomalonate yielded dihydrofuran derivatives by a 1,5‐electrocyclic reaction at C(β), and butadiene derivatives by carbene addition reaction at C(α) (Schemes 4 and 5; Table). Phenyl substituents at the N‐atom of the amides seem to be effective on the reaction pathways (Table). 相似文献
3.
Tandem carbonyl ylide formation-1,3-dipolar cycloaddition of α-diazo N-acetyl-tetrahydro-β-carbolin-1-one derivatives occur efficiently in the presence of a dirhodium catalyst to afford bimolecular cycloadducts in high yield. The Rh(II)-catalyzed reaction also takes place intramolecularly to give products derived from trapping of the carbonyl ylide dipole with a tethered alkene. The power of the intramolecular cascade sequence is that it rapidly assembles a pentacyclic ring system containing three new stereocenters and two adjacent quaternary centers stereospecifically in a single step and in high yield. 相似文献
4.
The quasi-antiaromatic 2H-indol-2-one ring system is readily generated by treating a 3-hydroxy-substituted 1,3-dihydroindol-2-one with a Lewis acid. Stepwise addition of various pi-nucleophiles to the highly reactive 2H-indol-2-one system occurs smoothly to afford substituted oxindoles. The cyclization was also carried out in an intramolecular fashion to give spiro-substituted oxindoles in good yield. 相似文献
5.
This work is dedicated to the investigation of strong summability of Fourier series in the context of periodic Morrey spaces. First, we study the Hilbert transform in the periodic vector-valued context. Boundedness of the Hilbert transform implies uniform estimates of the operator norms of the partial sums of the Fourier series. Afterwards, we study the Lizorkin-Triebel-Morrey and Nikol’skij-Besov-Morrey spaces. Here we concentrate on Lizorkin representations and embeddings into the scale of Hölder-Zygmund spaces. In the final section, we study consequences for strong summability of Fourier series. 相似文献
6.
Two cyclobenzaprine hydrochloride (CZ) microsized graphite selective sensors were investigated with dibutylsebacate as a plasticizer in a polymeric matrix of carboxylated polyvinyl chloride (PVC-COOH) in the case of sensor 1, based on the interaction between the drug and the dissociated COOH groups in the PVC-COOH. Sensor 2 was based on the interaction between the drug and ammonium reineckate, which acted as anionic electroactive material in the presence of polyvinyl chloride matrix. The two sensors were constructed by using 2-hydroxy propyl beta-cyclodextrin as an ionophore, which has a significant influence on increasing the membrane sensitivity and selectivity of both sensors. Fast and stable Nernstian responses of 1 x 10(-5) - 1 x 10(-2) and 1 x 10(-4) - 1 x 10(-2) M for the two sensors, respectively, with slopes of 58.6 and 55.5 mV/decade, respectively, over the pH range 2-4 were obtained. The proposed method displayed useful analytical characteristics for determination of CZ in its pure powder form with average recoveries 99.95 +/- 0.23 and 99.61 +/- 0.34% for sensors 1 and 2, respectively, and in plasma with good recoveries. The sensors were also used to determine the intact drug in the presence of its degradate and, thus, could be used as stability-indicating methods. The obtained results by the proposed methods were statistically analyzed and compared with those obtained by the U.S. Pharmacopeia method; no significant difference for either accuracy or precision was observed. Results obtained with the two electrodes revealed their performance characteristics, which were evaluated according to International Union of Pure and Applied Chemistry recommendations. 相似文献
7.
Metal-Containing Phthalocyanines Substituted with One Branched Bulky Moiety and Six Alkylthio Groups
Zehra Altunta? Bay?r ?ebnur Merey Esin Hamuryudan 《Monatshefte für Chemie / Chemical Monthly》2003,400(3):1027-1031
Unsymmetrically substituted metal-phthalocyanines composed of three hexylthio groups and one 1-chloro-3,4-dicyano-6-[2-(2-pyridylmethylamino)phenylthio]benzene
moiety was prepared by cyclization of the reactants in the presence of the anhydrous metal salts Zn(CH3COO)2, NiCl2, and CoCl2. The new unsymmetric phthalocyanines are very soluble in common organic solvents. The compounds were characterised by their
elemental analyses, IR, 1H NMR, MS and UV/Vis spectra. 相似文献
8.
Hanan A. Merey Nesrin K. Ramadan Sherine S. Diab Azza A. Moustafa 《Chemical Papers》2018,72(9):2247-2254
Accurate, precise, and sensitive UPLC method was developed and validated for the simultaneous determination of a quaternary mixture containing guaiphenesin (GUP), oxeladin citrate (OXC), diphenhydramine (DPH), and sodium benzoate (SOB) in the presence of GUP-related substance, guaiacol (GUA). Chromatographic separation was achieved using NUCLEOSHELL® column—C18 (4.0?×?50.0 mm, 2.7 μm). Isocratic elution at a flow rate 1.0 mL/min was performed using a mobile phase consisting of acetonitrile:phosphate buffer pH 3.5?±?0.1 (25.0:75.0, v/v). The specificity of the developed method was investigated by analyzing of laboratory-prepared mixtures containing different ratios of the four drugs, in the presence of GUA as well as their combined pharmaceutical formulation. The obtained results were statistically compared with those obtained by the official or reported methods, showing no significant difference with respect to accuracy and precision at p?=?0.05. 相似文献
9.
The [Cu(acac)2]‐catalyzed reactions of various α,β,γ,δ‐unsaturated bis‐ketones/bis‐esters/bis‐keto esters with dimethyl diazomalonate and ethyl diazoacetate were studied. Total steric/electronic convenience of the present reaction paths was investigated. Methoxy/nitro substituents in m‐/p‐positions on benzylidene biscarbonyls did not alter the general routes of the reactions, supporting concerted mechanism. Dihydrobenzoxepine/oxepine formation was sterically sensitive to the related pre‐ring conformation, and dihydrofurans were effected by both charge control and steric factors. 相似文献
10.
A concise and facile method for the synthesis of heterocyclic compounds with N? O tether was introduced. The two important steps of the synthesis are a Mitsunobu reaction and C? H activation. The Mitsunobu protocol allows to form the N? O moiety in the molecule, while subsequent C? H activation leads to heterocycles. 相似文献