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Triflate
Kinds of Triflate Terms modified by Triflate Selected AbstractsHeteroarylation of 1-Azulenyl Methyl Sulfide: Two-Step Synthetic Strategy for 1-Methylthio-3-(heteroaryl)azulenes Using the Triflate of N -Containing HeterocyclesEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 34 2008Junya Higashi Abstract 1-Azulenyl methyl sulfide reacts with highly electrophilic trifluoromethanesulfonates of N -heterocycles, that is, pyridine, isoquinoline, 1,10-phenanthroline, benzothiazole, quinoline, and acridine, to give 1-methylthio-3-(dihydroheteroaryl)azulenes in good yields. In the case of the reaction with the trifluoromethanesulfonate of pyridine, 1-methylthio-3-pyridylazulene was obtained directly under certain reaction conditions. Treatment of the 1-methylthio-3-(dihydroheteroaryl)azulenes with KOH or tBuOK afforded the corresponding 1-methylthio-3-(heteroaryl)azulenes in good yields. The redox behavior of these 1-methylthio-3-(heteroaryl)azulenes was examined by cyclic voltammetry and differential pulse voltammetry.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) [source] A Facile Route to Polysubstituted Naphthalenes and Benzofluorenols via Scandium Triflate- and Triflic Acid- Catalyzed Benzannulation of 2-(2-Alkynylarylidene)- 1,3-Dicarbonyl CompoundsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 11-12 2010Lu Liu Abstract This paper describes an efficient scandium triflate- and triflic acid-catalyzed benzannulation of 2-(2-alkynylarylidene)-1,3-dicarbonyl compounds to afford polysubstituted naphthalenes and benzo[a]fluorenols. The product selectivity could be tuned by subtle choice of the catalyst. An unprecedented process between alkynes and ketones is also explored. [source] Copper(II) Triflate as a Source of Triflic Acid: Effective, Green Catalysis of Hydroalkoxylation ReactionsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 14-15 2009Mathieu J.-L. Abstract The hydroalkoxylation of dicyclopentadiene (DCPD) and norbornene (NB) with 2-hydroxyethyl methacrylate (HEMA) for the synthesis of industrially relevant monomers has been investigated with various metal-based Lewis acids and strong Brønsted acids. In the absence of other additives, copper(II) triflate is the most efficient catalyst system. Kinetics, electron spin resonance (ESR), catalyst poisoning and cross experiments indicate that triflic acid (TfOH) is the true active catalyst in these reactions. This in situ generation of TfOH occurs via reduction of Cu(OTf)2 by the olefin reagent (DCPD, NB). The copper ions present in the reaction mixture act as radical polymerization retardants, preventing polymerization of HEMA (which is observed with most other metal salts and strong Brønsted acids investigated), thus improving the selectivity and yield (up to 95%) for the desired products. These observations have led to the development of a highly effective green process, using bulk reagents (no solvent) and a cheap, metal-free catalyst system, based on TfOH and a phenolic radical inhibitor (2,5-di- tert -butylhydroxytoluene, BHT). [source] On the Preparation and Polymerization of p -Methoxystyrene Miniemulsions in the Presence of Excess Ytterbium TriflateMACROMOLECULAR SYMPOSIA, Issue 1 2004Séverine Cauvin Abstract The cationic polymerization of p-methoxystyrene using an acid initiator and ytterbium triflate as a cocatalyst was studied in miniemulsion. Conductometry measurements revealed that ytterbium triflate dissociates in water. The high ionic strength implemented by ytterbium cation releasing requires the use of an electrosteric surfactant, i.e. sodium dodecylpolyoxyethylene(8) sulfate, as an efficient stabilizer against particle coalescence. The catalyst increases significantly the polymerization rate but only moderately affects the molar masses. A tentative polymerization scheme is proposed based on these results and several other åblank, experiments. [source] ChemInform Abstract: L-Proline Triflate as an Efficient and Reusable Catalyst for the One-Pot Synthesis of 2,4,5-Trisubstituted Imidazoles and 1,2,4,5-Tetrasubstituted Imidazoles.CHEMINFORM, Issue 41 2010Jianjun Li Abstract The solvent is a crucial factor in the presented method. [source] ChemInform Abstract: Diphenylammonium Triflate: A Novel and Efficient Catalyst for Synthesis of Spiro-Heterocyclic Compounds.CHEMINFORM, Issue 40 2010Jianjun Li Abstract An efficient one-pot procedure for the Biginelli reaction-like pseudo-four-component reaction and a possible mechanism are reported. [source] ChemInform Abstract: Approach to Synthesis of ,-Enamino Ketones and Pyrroles Catalyzed by Gallium(III) Triflate under Solvent-Free Conditions.CHEMINFORM, Issue 15 2010Jiuxi Chen 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: Catalytic Carbon,Sulfur Bond Formation by Amphoteric Vanadyl Triflate: Exploring with Thia-Michael Addition, Thioacetalization, and Transthioacetalization Reactions.CHEMINFORM, Issue 11 2010Chien-Tien Chen 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: An Efficient One-Pot Synthesis of Naphthoxazinones by a Three-Component Coupling of Naphthol, Aldehydes, and Urea Catalyzed by Zinc Triflate.CHEMINFORM, Issue 6 2010Alakananda Hajra 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: Ytterbium Triflate: A Highly Active Catalyst for Addition of Amines to Carbodiimides to N,N,,N,,-Trisubstituted Guanidines.CHEMINFORM, Issue 52 2009Xuehua Zhu 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: Iron(II) Triflate as an Efficient Catalyst for the Imination of Sulfoxides.CHEMINFORM, Issue 44 2009Olga Garcia Mancheno 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: Direct Alkylative Passerini Reaction of Aldehydes, Isocyanides, and Free Aliphatic Alcohols Catalyzed by Indium(III) Triflate.CHEMINFORM, Issue 39 2009Hikaru Yanai 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: A Sakurai,Prins,Ritter Reaction Sequence for the Diastereoselective Synthesis of 4-Amidotetrahydropyrans Catalyzed by Bismuth Triflate.CHEMINFORM, Issue 3 2009Gowravaram Sabitha 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: Imidazolium-Based Polymer-Supported Gadolinium Triflate as a Heterogeneous Recyclable Lewis Acid Catalyst for Michael Additions.CHEMINFORM, Issue 35 2008Ramesh Alleti 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: Highly Efficient and Versatile Chemoselective Addition of Amines to Epoxides in Water Catalyzed by Erbium(III) Triflate.CHEMINFORM, Issue 28 2008Antonio Procopio 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: Biphasic Hydroformylation in Ionic Liquids: Interaction Between Phosphane Ligands and Imidazolium Triflate, Toward an Asymmetric Process.CHEMINFORM, Issue 20 2008Loic Leclercq 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: Synthesis of Benzyl Esters Using 2-Benzyloxy-1-methylpyridinium Triflate.CHEMINFORM, Issue 13 2008Jumreang Tummatorn 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: O-Arylation of Carboxylic Acids Using (Phenyl)[2-(trimethylsilyl)phenyl]iodonium Triflate as a Precursor of Arynes.CHEMINFORM, Issue 1 2008Jian Xue 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] A General and Efficient Method for the Selective Synthesis of ,-Hydroxy Sulfides and ,-Hydroxy Sulfoxides Catalyzed by Gallium(III) Triflate.CHEMINFORM, Issue 42 2007Weike Su 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] Mild Reductive Opening of Aryl Pyranosides Promoted by Scandium(III) Triflate.CHEMINFORM, Issue 21 2007Hua-Li Qin 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] Ytterbium Triflate as an Efficient Catalyst for One-Pot Synthesis of Substituted Imidazoles Through Three-Component Condensation of Benzil, Aldehydes and Ammonium Acetate.CHEMINFORM, Issue 13 2007Li-Min Wang 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] Convenient Removal of N-tert-Butyl from Amides with Scandium Triflate.CHEMINFORM, Issue 33 2006A. K. Mahalingam 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] Bismuth Triflate,Chiral Bipyridine Complexes as Water-Compatible Chiral Lewis Acids.CHEMINFORM, Issue 9 2006Shu Kobayashi 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] Aluminum Triflate: A Remarkable Lewis Acid Catalyst for the Ring Opening of Epoxides by Alcohols.CHEMINFORM, Issue 5 2006D. Bradley Abstract For Abstract see ChemInform Abstract in Full Text. [source] One-Pot Synthesis of Dihydropyrimidinones (IV) Catalyzed by Strontium(II) Triflate under Solvent-Free Conditions.CHEMINFORM, Issue 50 2005Weike Su No abstract is available for this article. [source] Cross-Linked Poly(4-vinylpyridine/styrene) Copolymers as a Support for Immobilization of Ytterbium Triflate.CHEMINFORM, Issue 31 2005Byoung Se Lee No abstract is available for this article. [source] Scandium Triflate as an Efficient and Recyclable Catalyst for the Deprotection of tert-Butyl Aryl Sulfonamides.CHEMINFORM, Issue 30 2005A. K. Mahalingam No abstract is available for this article. [source] Diels,Alder Reaction and Double Phenylation in Reaction of Thiophenes with Diphenyliodonium Triflate.CHEMINFORM, Issue 25 2005Bian-Xiang Zhang Abstract For Abstract see ChemInform Abstract in Full Text. [source] Pd-Catalyzed One-Pot Coupling of Allylamines, Activated Alkenes, and Unsaturated Halides (or Triflate): An Atom-Efficient Synthesis of Highly Functionalized Pyrrolidines.CHEMINFORM, Issue 12 2005Luc Martinon No abstract is available for this article. [source] 4-(Nitro)-diphenylammonium Triflate(NDPAT) Catalyzed Esterification of Carboxylic Acids with Alcohols.CHEMINFORM, Issue 7 2005Xuan-Gan Liu Abstract For Abstract see ChemInform Abstract in Full Text. [source] |