- Epoxidation and oxidative dihydroxylation of C10–C13 unsaturated bridged hydrocarbons involving hydrogen peroxide and modified forms of heteromolybdic compounds
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Induced oxidation of C10–C13 tricyclic bridged olefins synthesized from C5–C8 cyclodiene hydrocarbons using hydrogen peroxide has been studied. It has been shown that phosphomolybdic heteropoly compounds supported on a finely divided carbon material and additionally modified with HBr and CoCO3 or Gd2O3 exhibit high activity in this reaction. Depending on the conditions of the experiments, the main reaction products are the corresponding oxiranes and diols that retain the structure of the reactant hydrocarbons.
- Alimardanov, Kh. M.,Sadygov,Garibov,Dadashova,Almardanova,Kuliev
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p. 415 - 423
(2017/07/05)
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- Microwave-assisted solvent-free Diels-Alder reaction - A fast and simple route to various 5,6-substituted norbornenes and polychlorinated norbornenes
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A series of 5,6-substituted norbornenes and 5,6-substituted polychlorinated norbornenes was prepared by using a microwave-assisted Diels-Alder reaction. This procedure proved very versatile, fast, and with an easy workup step, and therefore suitable even for large-scale synthesis. Georg Thieme Verlag Stuttgart · New York.
- Dejmek, Milan,Hrebabecky, Hubert,Sala, Michal,Drainsky, Martin,Nencka, Radim
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experimental part
p. 4077 - 4083
(2012/01/05)
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- [2+4] Cycloaddition of η6-(styrene)chromium tricarbonyl and conjugated dienes
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Cycloaddition of η6-(styrene)chromium tricarbonyl to hexa-2,4-diene or cyclopentadiene afford the Diels-Alder adducts with retention of the Cr(CO)3 group, whereas cyclohexa-1,3-diene undergoes aromatization to give η6-(ben
- Artemov,Sazonova,Revin,Rybkin,Lazarev,Faerman
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experimental part
p. 2103 - 2106
(2012/09/22)
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- New phosphine-functionalized N-heterocyclic carbene ligands for palladium-catalyzed hydroarylation reaction
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Novel triarylphosphine-functionalized imidazolinium salts have been prepared and successfully applied in palladium-catalyzed hydroarylation of bicyclic olefins. Under reductive conditions (HCOOH, Et3N), the complexes generated in situ from imidazolinium salts and Pd(OAc)2 catalyzed the hydroarylation of bicyclic alkenes with aryl iodides, providing the hydroarylation products with high turnover numbers (TON, up to 1.9-10 5) and turnover frequencies (TOF, up to 6.3-104). Georg Thieme Verlag Stuttgart.
- Zhong, Jun,Xie, Jian-Hua,Wang, Ai-E.,Zhang, Wei,Zhou, Qi-Lin
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p. 1193 - 1196
(2007/10/03)
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- A highly efficient palladacycle catalyst for hydrophenylation of C-, N-, and O-substituted bicyclic alkenes under aerobic condition
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A new phosphine-free palladacycle catalyst 4 was prepared from benzyl oxazoline in high yield and fully characterized. With it as catalyst, hydrophenylation reactions of a wide range of bicyclic alkenes, not only norbomene and norborriadiene but also oxa-
- Yuan, Ke,Zhang, Ting Ke,Hou, Xue Long
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p. 6085 - 6088
(2007/10/03)
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- Esters Synthesis by Addition of Monocarboxylic Acids to exo-5-Substituted Bicyclo[2.2.1]hept-2-ene Hydrocarbons
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New alicyclic esters were synthesized by addition at heating of aliphatic monocarboxylic saturated acids C1-C4 to exo-5-phenyl-, exo-5-cyclohexyl-, and exo-5-(cyclohex-3-enyl)bicyclo[2.2.1]hept-2-enes. Among the esters obtained the acetates has more pleasant odor with fruit tint, and they may be used as a comp onent of synthetic perfumes.
- Mamedov,Gadzhieva,Alimardanov
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p. 180 - 182
(2007/10/03)
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- Nickel catalysts for polymerization
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A method for the polymerization of cycloolefins in a presence of a nickel (0) compound or a compound which can be converted in situ into a nickel (0) compound, as a catalyst. The catalyst of the present invention exhibits very high catalytic activity towards polymerization of cycloolefins.
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- Highly efficient phosphapalladacyclic catalysts for the hydroarylation of norbornene
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Exceptionally high turnover numbers of up to 196 x 106 moles of product per mole of catalyst, turnover frequencies of up to 12 x 106 moles of product per mole of catalyst per hour, and yields of 98% were achieved in the hydroarylatio
- Brunel, Jean Michel,Heumann, Andreas,Buono, Gerard
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p. 1946 - 1949
(2007/10/03)
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- Scandium(III) triflate immobilised in ionic liquids: a novel and recyclable catalytic system for Friedel-Crafts alkylation of aromatic compounds with alkenes
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Scandium(III) triflate catalysed Friedel-Crafts alkylation of aromatic compounds with alkenes proceeded readily in the hydrophobic ionic liquid solvents based on 1,3-dialkylimidazolium salts with easy catalyst/solvent recycling, whereas these reactions did not occur in common organic solvents, water or hydrophilic ionic liquids at all.
- Song, Choong Eui,Shim, Woo Ho,Roh, Eun Joo,Choi, Jung Hoon
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p. 1695 - 1696
(2007/10/03)
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- Process for isomerizing endo-form of aromatic group-containing norbornenes to exo-form thereof, isomer mixture of aromatic group-containing norbornenes and process for preparing same, and ethylene/aromatic group-containing norborne copolymer and process
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A process for isomerization of an endo-form of aromatic group-containing norbornenes represented by the following formula (I) to an exo-form which comprises bringing the endo-form into contact with a solid acid catalyst. STR1 wherein p is 0 or an integer of 1 or more, q and r are each 0, 1 or 2, R1 to R15 are each independently hydrogen or halogen atom, aliphatic hydrocarbon group, aromatic hydrocarbon group or alkoxy group, R5 (or R6) are R9 (or R7) may be linked together through an alkylene group of 1-3 carbons or may be directly linked together.
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- Alkyl- and arylsubstituted ketenedithioacetal tetroxides: Diels-Alder reactivity and reductive desulfonylation of the adducts
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The Diels-Alder reactivity of the representative alkyl and aryl-substituted ketenedithioacetal tetroxides of general formula 1 is reported. These dienophiles reacted under thermal conditions (refluxing toluene) with cyclopentadiene to afford predominantly
- De Lucchi,Fabbri,Lucchini
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p. 1485 - 1496
(2007/10/02)
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- Palladium-catalysed Intermolecular Arylation and Alkenylation of Bicyclic Alkenes
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Bicyclic alkenes undergo facile intermolecular arylation or alkenylation by the corresponding organic iodides, KO2CH, n-Bu4NCl and 2.5percent Pd(OAc)2.
- Larock, Richard,Johnson, Peter L.
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p. 1368 - 1370
(2007/10/02)
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