Home About us Contact
|
Home About us Contact | ||
|
|
||
Aniline Derivatives (aniline + derivative)
Selected AbstractsRuthenium-Catalyzed Carbon,Carbon Bond Formation via the Cleavage of an Unreactive Aryl Carbon,Nitrogen Bond in Aniline Derivatives with Organoboronates.CHEMINFORM, Issue 38 2007Satoshi Ueno 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] Synthesis of 2-Dimethylaminobenzazoles via a Guanidine Intermediate: Reaction of 2-Substituted Aniline Derivatives with 2-Chloro-1,1,3,3-tetramethylformamidinium Chloride.CHEMINFORM, Issue 15 2003Kosei Ohno Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Efficiency of the Urushibara Nickel Catalyzed Atmospheric Hydrogenation in the Synthesis of Aniline Derivatives.CHEMINFORM, Issue 7 2001X. Liu 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: Synthesis and Local Anesthetic Activity of o-(Cyclopentenyl) and o-(Cyclopentyl)aniline Derivatives.CHEMINFORM, Issue 3 2002R. R. Gataullin 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] One-Pot Synthesis of Quinoline Derivatives Directly from Terminal Alkynes via Sequential Ruthenium(II) and Acid CatalysisADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 11-12 2010Min Zhang Abstract A convenient one-pot synthesis of 2,3-disubstituted, 2,3,6-trisubstituted, and 2,3,6,7-tetrasubstituted quinoline analogues from terminal alkynes via sequential ruthenium(II) and para -toluenesulfonic acid (p -TSA) co-catalyzed reactions is described. The catalytic process is shown to take place first via intermediate formation of an allyl ketone and then addition of an aniline derivative to the allyl ketone. The p -TSA is a catalyst for both allyl ketone and quinoline synthetic steps. The method allowed us to synthesize a wide range of quinoline derivatives and introduce different substituents by employing various simple starting materials. The reaction allows the synthesis of halogen-containing products. [source] Synthesis and characterization of polyaniline derivative and silver nanoparticle compositesPOLYMER INTERNATIONAL, Issue 10 2008Gururaj M Neelgund Abstract BACKGROUND: There has been a recent surge of interest in the synthesis and applications of electroactive polymers with incorporated metal nanoparticles. These hybrid systems are expected to display synergistic properties between the conjugated polymers and the metal nanoparticles, making them potential candidates for applications in sensors and electronic devices. RESULTS: Composites of polyaniline derivatives,polyaniline, poly(2,5-dimethoxyaniline) and poly(aniline-2,5-dimethoxyaniline),and silver nanoparticles were prepared through simultaneous polymerization of aniline derivative and reduction of AgNO3 in the presence of poly(styrene sulfonic acid) (PSS). We used AgNO3 as one of the initial components (1) to form the silver nanoparticles and (2) as an oxidizing agent for initiation of the polymerization reaction. UV-visible spectra of the synthesized nanocomposites reveal the synchronized formation of silver nanoparticles and polymer matrix. The morphology of the silver nanoparticles and degree of their dispersion in the nanocomposites were characterized by transmission electron microscopy. Thermogravimetric analysis and differential scanning calorimetry results indicate an enhancement of the thermal stability of the nanocomposites compared to the pure polymers. The electrical conductivity of the nanocomposites is in the range 10,4 to 10,2 S cm,1. CONCLUSION: A single-step process for the synthesis of silver nanoparticle,polyaniline derivative nanocomposites doped with PSS has been demonstrated. The approach in which silver nanoparticles are formed simultaneously during the polymerization process results in a good dispersion of the nanoparticles in the conductive polymer matrix. Copyright © 2008 Society of Chemical Industry [source] New bis(diphenylphosphino)aniline derivatives: Synthesis and spectroscopic characterizationHETEROATOM CHEMISTRY, Issue 6 2007Nermin Biricik Six new multidentate bis(diphenyl-phosphino)amine [R,N(PPh2)2] ligands have been prepared from the reaction of aniline derivatives, R,NH2, with Ph2PCl in the presence of triethylamine. All of the compounds were obtained in good yields and were characterized by NMR, IR, and microanalysis. © 2007 Wiley Periodicals, Inc. Heteroatom Chem 18:613,616, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20362 [source] Microwave-assisted nucleophilic cleavage of 5,7-dimethyl-2-phenyl-1-oxo-lH -pyrazolo[ 1,2- a]pyrazol-4-ylium-3-olate to ,-phenylmalonamidesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 7 2005Daniel E. Lynch Three ,-phenylmalonamides have been prepared by the selective nucleophilic cleavage of 5,7-dimethyl-2-phenyl-1-oxo-1H -pyrazolo[1,2- a]pyrazol-4-ylium-3-olate in solventless microwave syntheses. The three weak nucleophiles employed were aniline, p -chloroaniline and m -toluidine. The ,-phenylmalonamides of these three aniline derivatives could not be prepared using the previously reported solvent syntheses via 3-oxopyrazolo[1,2- a]pyrazol-8-ylium-1-olates. All products were characterised using, infrared spectroscopy, 1H nmr and electrospray mass spectrometry. The single crystal X-ray structures of the starting pyrazolo-[1,2- a]pyrazole and ,-phenylmalon- m -toluidide are also reported. [source] Electrochemical polymerization and characterization of polyether-substituted aniline derivativesPOLYMER INTERNATIONAL, Issue 8 2007Seha Tirke Abstract New compounds consisting of aniline units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis and cyclic voltammetry in an aqueous solution containing 3.0 mol L,1 H2SO4. Chemical polymerization was carried out using (NH4)2S2O8 as oxidizing agent. It was found that both methods gave the same polymer product without any cleavage of the polyether bridge between aniline rings. The polymers were characterized using the Fourier transform infrared spectroscopic technique and the thermal behavior of electrochemically prepared polymers was investigated using thermogravimetric analysis. Spectroelectrochemical properties of the films were investigated using the in situ UV-visible spectroscopic technique. Copyright © 2007 Society of Chemical Industry [source] Sonochemical synthetic methods to produce functionalized conducting copolymersPOLYMERS FOR ADVANCED TECHNOLOGIES, Issue 4 2010P. Najafi Moghadam Abstract Polyaniline (PANI) is one of the most investigated intrinsically conducting polymers. Copolymerization of aniline with aniline derivatives was considered one of the most effective and promising ways of improving the properties of PANI. In this work, firstly ethyl 3-aminobenzoate and butyl 3-aminobenzoate were synthesized from 3-aminobenzoic acid by direct esterification. Then the copolymerization of 3-amino benzoic acid, ethyl 3-aminobenzoate, and butyl 3-aminobenzoate with aniline was carried out by sonochemical polymerization in aqueous hydrochloric acid using ammonium persulfate (APS) as an initiator. The effects of variation in the molar ratio of the two monomers on chain structure, conductivity, and the redox properties of the copolymer are discussed. The prepared polymers are characterized by 1H NMR spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Thermal behavior of the prepared copolymers was studied by differential scanning calorimetry. The copolymers were doped with HCl and their conductivity was measured. Copyright © 2009 John Wiley & Sons, Ltd. [source] Synthesis and characterizations of N,N,-bis(diphenylphosphino)-2-(aminomethyl)aniline derivatives: application of a palladium(II) complex as pre-catalyst in Heck and Suzuki cross-coupling reactionsAPPLIED ORGANOMETALLIC CHEMISTRY, Issue 3 2009Murat Aydemir Abstract The reaction of 2-(aminomethyl)aniline with 2 equivalents of PPh2Cl in the presence of Et3N, proceeds in CH2Cl2 to give N,N,-bis(diphenylphosphino)-2-(aminomethyl)aniline 1 in good yield. Oxidation of 1 with aqueous H2O2, elemental sulfur or gray selenium gave the corresponding oxide, sulfide and selenide dichalcogenides [Ph2P(E)NHC6H4CH2NHP(E)Ph2] (E: O, 2a; S, 2b; Se, 2c), respectively. The reaction of [Ph2PNHC6H4CH2NHPPh2] with PdCl2(cod), PtCl2(cod) and [Cu(MeCN)4]PF6 gave the corresponding chelate complexes, PdCl21, PtCl21 and [Cu(1)2]PF6. The new compounds were fully characterized by NMR, IR spectroscopy and elemental analysis. The catalytic activity of the Pd(II) complex was tested in the Suzuki coupling and Heck reactions. The Pd(II) complex catalyzes the Suzuki coupling and Heck reaction, affording biphenyls and stilbenes respectively, in good yields. Copyright © 2009 John Wiley & Sons, Ltd. [source] The effect of molecular planarity on crystal non-centrosymmetry in benzylidene,aniline derivativesACTA CRYSTALLOGRAPHICA SECTION C, Issue 6 2002De-Chun Zhang In the title compound, N -(2-methoxyphenyl)-4-nitrobenzylideneamine, C14H12N2O3, the two phenyl rings make a dihedral angle of 48.0,(2)° and the nitro group is at an angle of 6.5,(1)° with respect to its attached phenyl ring. In the crystal structure, molecules are related as centrosymmetric pairs through ,,, interactions and are further connected through strong C,H,O hydrogen bonds [C,O 3.4259,(17),Å and C,H,O 167°], forming molecular stacks along [100]. These stacks associate further through longer C,H,O interactions, forming two-dimensional networks. In the c direction, there are only weak van der Waals interactions. The relationship between the molecular planarity and its centrosymmetry is also briefly described. [source] Ring-Closing Olefin Metathesis for the Synthesis of Benzene DerivativesCHEMISTRY - AN ASIAN JOURNAL, Issue 4 2006Kazuhiro Yoshida Assist., Prof. Abstract Benzene derivatives were synthesized in excellent yield from 1,4,7-trien-3-ols by tandem ruthenium-catalyzed ring-closing olefin metathesis (RCM)/dehydration. The method was extended to the tandem RCM/oxidation process to obtain phenol and aniline derivatives. This method displays many advantages over aromatic-substitution-based classical routes. [source] | |||||||||||||