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Benzylic C (benzylic + c)
Selected AbstractsAromatic and Benzylic C,H Bond Functionalization Upon Reaction between Nitriles and Perfluoroalkyl SulfoxidesEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 31 2009Yohan Macé Abstract We studied the thermal behavior of some intermediates formed by reaction of nitriles with perfluoroalkyl sulfoxides upon trifluoromethanesulfonic anhydride activation. Bistriflate ketal 3, precursor of sulfilimine 1, may undergo a rearrangement to sulfanyl nitrile 5 after triflic acid elimination under thermal conditions. With p -tolyl trifluoromethyl sulfoxide, remote triflic acid elimination from intermediate 4 leads to benzamide 8 formation. These reactions involve, respectively, selective functionalization of the aromatic ortho C,H bond or the benzylic C,H bond para to the sulfoxide group. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] ChemInform Abstract: Copper-Catalyzed Amination of Primary Benzylic C,H Bonds with Primary and Secondary Sulfonamides.CHEMINFORM, Issue 39 2010David A. Powell Abstract The amination of secondary benzylic C,H bonds is also possible. [source] ChemInform Abstract: Catalytic Alkylation of Benzylic C,H Bonds with 1,3-Dicarbonyl Compounds Utilizing Oxygen as Terminal Oxidant.CHEMINFORM, Issue 23 2010Camille A. Correia 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 Stereoselective Benzylic C,H Functionalizations by Oxidative C,H Activation and Organocatalysis.CHEMINFORM, Issue 9 2010Fides Benfatti 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: Intramolecular Ir(I)-Catalyzed Benzylic C,H Bond Amination of ortho-Substituted Aryl Azides.CHEMINFORM, Issue 2 2010Ke Sun 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: Cross Dehydrogenative Arylation (CDA) of a Benzylic C,H Bond with Arenes by Iron Catalysis.CHEMINFORM, Issue 38 2009Yi-Zhou 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 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: Clean and Efficient Benzylic C,H Oxidation in Water Using a Hypervalent Iodine Reagent: Activation of Polymeric Iodosobenzene with KBr in the Presence of Montmorillonite-K10.CHEMINFORM, Issue 5 2009Toshifumi Dohi 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: Benzylic C,H Activation and C,O Bond Formation via Aryl to Benzylic 1,4-Palladium Migrations.CHEMINFORM, Issue 43 2008Tanay Kesharwani 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] Copper-Catalyzed Amidation of Allylic and Benzylic C,H Bonds.CHEMINFORM, Issue 16 2007Guillaume Pelletier 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] ChemInform Abstract: Amination of Benzylic C,H Bonds by Aryl Azides Catalyzed by CoII(porphyrin) Complexes.CHEMINFORM, Issue 11 2001A New Reaction Leading to Secondary Amines, Imines. 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] Aromatic and Benzylic C,H Bond Functionalization Upon Reaction between Nitriles and Perfluoroalkyl SulfoxidesEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 31 2009Yohan Macé Abstract We studied the thermal behavior of some intermediates formed by reaction of nitriles with perfluoroalkyl sulfoxides upon trifluoromethanesulfonic anhydride activation. Bistriflate ketal 3, precursor of sulfilimine 1, may undergo a rearrangement to sulfanyl nitrile 5 after triflic acid elimination under thermal conditions. With p -tolyl trifluoromethyl sulfoxide, remote triflic acid elimination from intermediate 4 leads to benzamide 8 formation. These reactions involve, respectively, selective functionalization of the aromatic ortho C,H bond or the benzylic C,H bond para to the sulfoxide group. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] Intramolecular Hydro- N -alkylation of Hydrazones and Oxime Ethers: Synthesis of Novel D -Secoestrone Isoquinuclidines via Domino 1,5-Hydride Shift/CyclizationEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 21 2009Éva Frank Abstract The direct transformation of a benzylic C(sp3),H bond into a C,N bond from steroidal hydrazones 10b, 10f,l and oxime ethers 28b,d under the action of a stoichiometric amount of Lewis acid is reported. The mechanism of functionalization to give novel types of isoquinuclidine derivatives 25b, 25f,l and 32b,d is assumed to involve an intramolecular domino 1,5-hydride transfer/cyclization sequence. Azomethine imines 23b, 23f,l and oxyiminium ions 29b,d are proposed as intermediates, which undergo 1,5-hydride shift to give the tertiary carbocation 24b, 24f,l or 31b,d. The nucleophilic addition of the hydrazine or hydroxylamine moiety to the benzylic C-9 carbon led to bridged azaestrone derivatives. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] Ab initio and DFT calculations of benzaldoxime elimination kinetics in the gas phaseINTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, Issue 10 2008Jose R. Mora Abstract The mechanism for the gas-phase molecular elimination kinetics of benzaldoxime was examined at MP2/6-31G, MP2/6-31G(d,p), B3LYP/6-31G, B3LYP/6-31G(d,p), MPW1PW91/6-31G, and MPW1PW91/6-31G(d,p) levels of theory. The products of elimination of this oxime are benzonitrile and water. Calculated thermodynamic and kinetic parameters estimated from B3LYP/6-31G was found to be in better agreement with the experimental values. Transition state structure is best described as a four-membered cyclic structure with good approximation to planarity. NBO charges analysis revealed a little greater polarization of the benzylic C,H,+ rather than N,OH,,. Bond indexes and synchronicity parameters are in agreement with a concerted semi-polar type of mechanism with benzylic CH bond breaking as determining step of the reaction. © 2008 Wiley Periodicals, Inc. Int J Quantum Chem, 2008 [source] ChemInform Abstract: Copper-Catalyzed Amination of Primary Benzylic C,H Bonds with Primary and Secondary Sulfonamides.CHEMINFORM, Issue 39 2010David A. Powell Abstract The amination of secondary benzylic C,H bonds is also possible. [source] | ||||||||||