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Facile Preparation (facile + preparation)
Selected AbstractsFacile Preparation of 3-Amino-4-(arylamino)-1H -isochromen-1-ones by a New Multicomponent ReactionEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 5 2005Till Opatz Abstract Reactions between 2-formylbenzoic acid, various anilines and HCN result in the formation of 3-amino-4-(arylamino)-1H -isochromen-1-ones in high yield. The mechanism of this three-component condensation involves the intermediate formation of an ,-aminonitrile and subsequent cyclization through nucleophilic attack of the ortho -carboxylate at the nitrile carbon. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) [source] Odoriferous Cyclic Ethers via Co-Halogenation Reaction: Facile Preparation of Nerol Oxide, Florol®, Florol® Methyl Ether, and Pityol® Methyl EtherHELVETICA CHIMICA ACTA, Issue 1 2007Pankaj Gupta Abstract A series of odoriferous cyclic ethers, including nerol oxide (1), Florol® (2), Florol methyl ether (3), and Pityol® methyl ether (4b), were prepared by a versatile synthetic protocol based on co-halogenation with 1,3-dibromo-5,5-dimethylhydantoin (=,1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione; DDH) as the key step. The methodology provides a facile access to important perfumery molecules from abundantly available monoterpene alcohols. [source] Polyurethane- and Polystyrene-Supported 2,2,6,6-Tetramethyl- piperidine-1-oxyl (TEMPO); Facile Preparation, Catalytic Oxidation and Application in a Membrane ReactorADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 18 2008Muhammad Afzal Subhani Abstract In this contribution, the facile synthesis of two new polymer-supported 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) catalysts and their application in the catalytic oxidation of alcohols to carbonyl compounds are described. For attachment of the TEMPO group to the polymer an isocyanate functionalized polymer is chosen. This new approach facilitates the synthesis in comparison with previously existing methods which generally require deprotonation of TEMPO prior to reaction with the polymer. Following this approach, polyurethane (PU)- and polystyrene (PS)-based TEMPO catalysts are prepared in a one-step reaction from commercially available compounds. Both polymer-supported catalysts showed promising yields for a variety of substrates using inorganic and/or organic co-oxidants in biphasic and/or monophasic systems. The recyclability of the corresponding catalysts was studied in repetitive batch experiments using filtration or distillation depending on the support type. Furthermore, application of the homogeneous polyurethane-supported TEMPO for the selective oxidation of benzyl alcohol in a continously operated membrane reactor is demonstrated. [source] Facile Preparation of Environmental Stable High-Temperature Superconducting Ceramic and Polymer CompositesJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 8 2007Yulia Galagan A novel facile technique to prepare composite materials based on superconducting ceramics (Bi2Sr2CaCu2Ox) and an acrylate polymer matrix has been developed. The polymer does not have a negative effect on the superconductivity properties of the ceramics. The interpenetrating three-dimensional polymeric network formed within ceramics improves its environmental stability. [source] ChemInform Abstract: Facile Preparation of Alkoxybenzoxazoles via Direct SNAr on the Benzoxazole Ring.CHEMINFORM, Issue 16 2010Herve Germain Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: A Facile Preparation of trans-1,2-Cyclopropanes Containing p-Trifluoromethylphenyl Group and Its Application to the Construction of Pyrazole and Cyclopropane Ring Fused Pyridazinone Derivatives.CHEMINFORM, Issue 6 2009Weiguo Cao Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Facile Preparation of Thiophene C2-Ethers Using the Mitsunobu Reaction.CHEMINFORM, Issue 3 2009Craig S. Harris Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Facile Preparation and Molecular Structure of a Novel Metacyclophane (II).CHEMINFORM, Issue 48 2008Jing-Lei Zhang Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Facile Preparation of 2-Imidazolines from Aldehydes with tert-Butyl Hypochlorite.CHEMINFORM, Issue 47 2007Midori Ishihara Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Facile Preparation of Amides from Azo Compounds by SmI2.CHEMINFORM, Issue 40 2006Xue Li Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Facile Preparation of Allyl Amines and Pyrazoles by Hydrazinolysis of 2-Ketoaziridines.CHEMINFORM, Issue 17 2006Gang Chen Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] A Facile Preparation of N-Protected Indolaldehydes Using a Modified Hass Procedure.CHEMINFORM, Issue 10 2006Arasambattu K. Mohanakrishnan Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Indium-Mediated Facile Preparation of 2-(Heterocyclic thio)-1-(2,3,4-trimethoxyphenyl)ethanone in Aqueous Media.CHEMINFORM, Issue 52 2004Song Yang Abstract For Abstract see ChemInform Abstract in Full Text. [source] Facile Preparation of trans-2,3-Bis(-tert-butylaminomethyl) Norbornene.CHEMINFORM, Issue 17 2003J. H. Wynne Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Facile Preparation and Rearrangement of Allylic Dialkoxy Disulfides.CHEMINFORM, Issue 15 2002Samuel Braverman Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: A Facile Preparation of exo-Cyclic Conjugated Dienes Fused to Lactams or Lactones via Intramolecular Coupling of Acetylenes and Their Behavior in Diels,Alder Reactions.CHEMINFORM, Issue 12 2001Hirokazu Urabe Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Facile Preparation of Hydrazones by the Treatment of Azides with Hydrazines Catalyzed by FeCl3×6H2O.CHEMINFORM, Issue 5 2001Ian C. Barrett Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] K2CO3 -Promoted Cascade Michael-Alkylation Reactions: A Facile Preparation of Diethyl trans -2,3-Disubstituted 1,1-CyclopropanedicarboxylatesCHINESE JOURNAL OF CHEMISTRY, Issue 9 2009Gaosheng Yang Abstract A cascade Michael-alkylation reaction of diethyl benzylidenemalonates with chloroacetophenones was realized by using K2CO3 as the promoter. With this method, a series of diethyl trans -2,3-disubstituted 1,1-cyclopropane- dicarboxylates have been facilely synthesized in moderate yields under mild conditions. The relative configurations of two typical products were confirmed by X-ray crystallographic analysis. [source] Facile preparation of core-crosslinked micelles from azide-containing thermoresponsive double hydrophilic diblock copolymer via click chemistryJOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 3 2008Xiaoze Jiang Abstract Double hydrophilic diblock copolymer, poly(N,N -dimethylacrylamide)- b -poly(N -isopropylacrylamide- co -3-azidopropylacrylamide) (PDMA- b -P(NIPAM- co -AzPAM), containing azide moieties in one of the blocks was synthesized via consecutive reversible addition-fragmentation chain transfer polymerization. The obtained diblock copolymer molecularly dissolves in aqueous solution at room temperature, and can further supramolecularly self-assemble into core-shell nanoparticles consisting of thermoresponsive P(NIPAM- co -AzPAM) cores and water-soluble PDMA coronas above the lower critical solution temperature of P(NIPAM- co -AzPAM) block. As the micelle cores contain reactive azide residues, core crosslinking can be facilely achieved upon addition of difunctional propargyl ether via click chemistry. In an alternate approach in which the PDMA- b -P(NIPAM- co -AzPAM) diblock copolymer was dissolved in a common organic solvent (DMF), the core-crosslinked (CCL) micelles can be fabricated via "click" crosslinking upon addition of propargyl ether and subsequent dialysis against water. CCL micelles prepared by the latter approach typically possess larger sizes and broader size distributions, compared with that obtained by the former one. In both cases, the obtained (CCL) micelles possess thermoresponsive cores, and the swelling/shrinking of which can be finely tuned with temperature, rendering them as excellent candidates as intelligent drug nanocarriers. Because of the high efficiency and quite mild conditions of click reactions, we expect that this strategy can be generalized for the structural fixation of other self-assembled nanostructures. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 860,871, 2008 [source] Tris(8-hydroxyquinoline-5-sulfonate)aluminum Intercalated Mg,Al Layered Double Hydroxide with Blue Luminescence by Hydrothermal SynthesisADVANCED FUNCTIONAL MATERIALS, Issue 17 2010Shuangde Li Abstract Blue luminescent hybrid materials (DDS,AQS(x%)/LDH) are successfully prepared by co-intercalating tris(8-hydroxyquinoline-5-sulfonate)aluminum anions (AQS3,) and dodecyl sulfonate (DDS,) with different molar ratios into Mg,Al layered double hydroxides (LDHs) by the hydrothermal and solution co-precipitation methods. A film of the material on a quartz substrate is obtained by the solvent evaporation method. The results show the blue luminescence is remarkably different from the pristine Na3AQS, which has cyan luminescence (ca. 450,470 nm vs. 495 nm). Furthermore, the hydrothermal product of DDS,AQS(66.67%)/LDH exhibits optimal luminous intensity and a significantly enhanced fluorescence lifetime. Nuclear magnetic resonance and Fourier-transform infrared spectroscopy indicate that the cyan,blue luminescence transition is due to the isomerization of meridianal to facial AQS via ligand flip caused by a host,guest electrostatic interaction, in combination with the dispersion and pre-intercalation effect of DDS. The hydrothermal conditions can promote a more ordered alignment of the intercalated fac -AQS compared with alignment in the solution state, and the rigid LDHs environment can confine the internal mobility of AQS to keep the facial configuration stable. This stability allows a facile preparation of large amounts of blue luminous powder/film, which is a new type of inorganic,organic hybrid photofunctional material. [source] The Use of Copper Flow Reactor Technology for the Continuous Synthesis of 1,4-Disubstituted 1,2,3-TriazolesADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 6 2009Andrew Abstract A library of 1,4-disubstituted 1,2,3-triazoles was synthesized using a copper flow reactor. Organic azides, generated in situ from alkyl halides and sodium azide, were reacted with acetylenes using the copper-catalyzed Huisgen 1,3-dipolar cycloaddition. This process eliminates both the handling of organic azides and the need for additional copper catalyst and permits the facile preparation of numerous triazoles in a continuous flow process. [source] Magnesium oxide microspheres as a novel solid-phase extraction sorbent for the determination of benzo[a]pyrene in environmental water samplesJOURNAL OF SEPARATION SCIENCE, JSS, Issue 12 2010Jing Jin Abstract Magnesium oxide microspheres were developed as a novel SPE sorbent for the determination of benzo[a]pyrene (BaP), one of the most potent carcinogenic agents, in environmental water samples. The parameters controlling the extraction efficiency, such as elution volume, flow rate, pH values, and breakthrough volume, were investigated in detail. Considering the facile preparation and satisfying recovery, a corresponding analytical method has been developed to determine the concentration of BaP in real tap water, river water, and seawater. The recoveries for the spiked BaP were excellent (94,101%). [source] ChemInform Abstract: Preparation and Reactions of (,-Trifluoromethyl)vinyl Sulfonium Salt.CHEMINFORM, Issue 41 2010Ryoko Maeda Abstract A facile preparation of title salts (III) is developed. [source] | |||||||||||||||||||||||||