The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Masayuki Shirai - One of the best experts on this subject based on the ideXlab platform.
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hydrogenation of benzothiophene free naphthalene over charcoal supported metal catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2007Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Mitsumasa Osada, Masayuki ShiraiAbstract:Abstract Hydrogenation of benzothiophene-free naphthalene was examined over various transition metal (rhodium, ruthenium, palladium, and platinum) catalysts supported on charcoal in supercritical carbon dioxide (scCO 2 ) solvent at low temperature (313 K). Among these, a charcoal-supported rhodium catalyst was found to be the most active, while a charcoal-supported ruthenium catalyst was found to give the highest cis -decahydronaphthalene ( cis -decalin) selectivity. A systematic investigation of hydrogenations of naphthalene and tetrahydronaphthanele (tetralin) in scCO 2 revealed that naphthalene hydrogenation is a consecutive and cis - and trans -decalin were formed via tetralin.
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low temperature hydrogenation of tetralin over supported rhodium catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Hydrogenation of tetralin was studied over supported rhodium catalysts in supercritical carbon dioxide solvent at 333 K. The results were compared with those in an organic solvent and under neat conditions. Higher Cis-Decalin yield was obtained in supercritical carbon dioxide solvent than under non-supercritical conditions. It was observed that higher hydrogen concentration at the surface in supercritical carbon dioxide solvent led to fast direct hydrogenation of tetralin to Cis-Decalin; the flipping of the intermediate, octalin, to give trans-decalin could be prevented.
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Tuning Cis-Decalin Selectivity in Naphthalene Hydrogenation Over Carbon-supported Rhodium Catalyst Under Supercritical Carbon dioxide
Catalysis Letters, 2006Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Tomoya Inoue, Masayuki ShiraiAbstract:Catalytic hydrogenation of naphthalene to decalin was studied over a carbon-supported rhodium catalyst in supercritical carbon dioxide solvent at 333 K, and the results were compared with those in an organic solvent. cis -, trans -Decalin and tetralin were formed from the beginning of the reaction in supercritical carbon dioxide. Higher concentration of hydrogen in carbon dioxide solvent and on the active site, and also the suppression of desorption of partially hydrogenated tetralin molecules from the active site would be responsible for higher selectivity to cis -decalin in supercritical carbon dioxide than that in an organic solvent.
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stereoselective hydrogenation of tetralin to cis decalin over a carbon supported rhodium catalyst in supercritical carbon dioxide solvent
Chemistry Letters, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Cis-Decalin was selectively obtained with high cis/trans ratio (83%) over a carbon-supported rhodium catalyst at 333 K under 6 MPa of hydrogen and 15 MPa of carbon dioxide.
Norihito Hiyoshi - One of the best experts on this subject based on the ideXlab platform.
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hydrogenation of benzothiophene free naphthalene over charcoal supported metal catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2007Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Mitsumasa Osada, Masayuki ShiraiAbstract:Abstract Hydrogenation of benzothiophene-free naphthalene was examined over various transition metal (rhodium, ruthenium, palladium, and platinum) catalysts supported on charcoal in supercritical carbon dioxide (scCO 2 ) solvent at low temperature (313 K). Among these, a charcoal-supported rhodium catalyst was found to be the most active, while a charcoal-supported ruthenium catalyst was found to give the highest cis -decahydronaphthalene ( cis -decalin) selectivity. A systematic investigation of hydrogenations of naphthalene and tetrahydronaphthanele (tetralin) in scCO 2 revealed that naphthalene hydrogenation is a consecutive and cis - and trans -decalin were formed via tetralin.
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low temperature hydrogenation of tetralin over supported rhodium catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Hydrogenation of tetralin was studied over supported rhodium catalysts in supercritical carbon dioxide solvent at 333 K. The results were compared with those in an organic solvent and under neat conditions. Higher Cis-Decalin yield was obtained in supercritical carbon dioxide solvent than under non-supercritical conditions. It was observed that higher hydrogen concentration at the surface in supercritical carbon dioxide solvent led to fast direct hydrogenation of tetralin to Cis-Decalin; the flipping of the intermediate, octalin, to give trans-decalin could be prevented.
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Tuning Cis-Decalin Selectivity in Naphthalene Hydrogenation Over Carbon-supported Rhodium Catalyst Under Supercritical Carbon dioxide
Catalysis Letters, 2006Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Tomoya Inoue, Masayuki ShiraiAbstract:Catalytic hydrogenation of naphthalene to decalin was studied over a carbon-supported rhodium catalyst in supercritical carbon dioxide solvent at 333 K, and the results were compared with those in an organic solvent. cis -, trans -Decalin and tetralin were formed from the beginning of the reaction in supercritical carbon dioxide. Higher concentration of hydrogen in carbon dioxide solvent and on the active site, and also the suppression of desorption of partially hydrogenated tetralin molecules from the active site would be responsible for higher selectivity to cis -decalin in supercritical carbon dioxide than that in an organic solvent.
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stereoselective hydrogenation of tetralin to cis decalin over a carbon supported rhodium catalyst in supercritical carbon dioxide solvent
Chemistry Letters, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Cis-Decalin was selectively obtained with high cis/trans ratio (83%) over a carbon-supported rhodium catalyst at 333 K under 6 MPa of hydrogen and 15 MPa of carbon dioxide.
Srinivasa D. Reddy - One of the best experts on this subject based on the ideXlab platform.
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ready access to functionally embellished cis hydrindanes and cis decalins protecting group free total syntheses of nootkatone and noreremophilane
ChemInform, 2013Co-Authors: Kishor L. Handore, B. Seetharamsingh, Srinivasa D. ReddyAbstract:This simple and efficient title reaction allows the synthesis of the compounds (III) and (VI) in a highly diastereoselective manner.
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ready access to functionally embellished cis hydrindanes and cis decalins protecting group free total syntheses of nootkatone and noreremophilane
Journal of Organic Chemistry, 2013Co-Authors: Kishor L. Handore, B. Seetharamsingh, Srinivasa D. ReddyAbstract:A simple and efficient synthesis of functionalized cis-hydrindanes and Cis-Decalins was achieved using a sequential Diels–Alder/aldol approach in a highly diastereoselective manner. The scope of this method was tested with a variety of substrates and was successfully applied to the synthesis of two natural products in racemic form. The highlights of the present work provide ready access to 13 new cis-hydrindanes/Cis-Decalins, a protecting group-free total synthesis of an insect repellent Nootkatone, and the first synthesis of a Noreremophilane using the shortest sequence.
Osamu Sato - One of the best experts on this subject based on the ideXlab platform.
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hydrogenation of benzothiophene free naphthalene over charcoal supported metal catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2007Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Mitsumasa Osada, Masayuki ShiraiAbstract:Abstract Hydrogenation of benzothiophene-free naphthalene was examined over various transition metal (rhodium, ruthenium, palladium, and platinum) catalysts supported on charcoal in supercritical carbon dioxide (scCO 2 ) solvent at low temperature (313 K). Among these, a charcoal-supported rhodium catalyst was found to be the most active, while a charcoal-supported ruthenium catalyst was found to give the highest cis -decahydronaphthalene ( cis -decalin) selectivity. A systematic investigation of hydrogenations of naphthalene and tetrahydronaphthanele (tetralin) in scCO 2 revealed that naphthalene hydrogenation is a consecutive and cis - and trans -decalin were formed via tetralin.
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low temperature hydrogenation of tetralin over supported rhodium catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Hydrogenation of tetralin was studied over supported rhodium catalysts in supercritical carbon dioxide solvent at 333 K. The results were compared with those in an organic solvent and under neat conditions. Higher Cis-Decalin yield was obtained in supercritical carbon dioxide solvent than under non-supercritical conditions. It was observed that higher hydrogen concentration at the surface in supercritical carbon dioxide solvent led to fast direct hydrogenation of tetralin to Cis-Decalin; the flipping of the intermediate, octalin, to give trans-decalin could be prevented.
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Tuning Cis-Decalin Selectivity in Naphthalene Hydrogenation Over Carbon-supported Rhodium Catalyst Under Supercritical Carbon dioxide
Catalysis Letters, 2006Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Tomoya Inoue, Masayuki ShiraiAbstract:Catalytic hydrogenation of naphthalene to decalin was studied over a carbon-supported rhodium catalyst in supercritical carbon dioxide solvent at 333 K, and the results were compared with those in an organic solvent. cis -, trans -Decalin and tetralin were formed from the beginning of the reaction in supercritical carbon dioxide. Higher concentration of hydrogen in carbon dioxide solvent and on the active site, and also the suppression of desorption of partially hydrogenated tetralin molecules from the active site would be responsible for higher selectivity to cis -decalin in supercritical carbon dioxide than that in an organic solvent.
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stereoselective hydrogenation of tetralin to cis decalin over a carbon supported rhodium catalyst in supercritical carbon dioxide solvent
Chemistry Letters, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Cis-Decalin was selectively obtained with high cis/trans ratio (83%) over a carbon-supported rhodium catalyst at 333 K under 6 MPa of hydrogen and 15 MPa of carbon dioxide.
Chandrashekhar V Rode - One of the best experts on this subject based on the ideXlab platform.
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hydrogenation of benzothiophene free naphthalene over charcoal supported metal catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2007Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Mitsumasa Osada, Masayuki ShiraiAbstract:Abstract Hydrogenation of benzothiophene-free naphthalene was examined over various transition metal (rhodium, ruthenium, palladium, and platinum) catalysts supported on charcoal in supercritical carbon dioxide (scCO 2 ) solvent at low temperature (313 K). Among these, a charcoal-supported rhodium catalyst was found to be the most active, while a charcoal-supported ruthenium catalyst was found to give the highest cis -decahydronaphthalene ( cis -decalin) selectivity. A systematic investigation of hydrogenations of naphthalene and tetrahydronaphthanele (tetralin) in scCO 2 revealed that naphthalene hydrogenation is a consecutive and cis - and trans -decalin were formed via tetralin.
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low temperature hydrogenation of tetralin over supported rhodium catalysts in supercritical carbon dioxide solvent
Applied Catalysis A-general, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Hydrogenation of tetralin was studied over supported rhodium catalysts in supercritical carbon dioxide solvent at 333 K. The results were compared with those in an organic solvent and under neat conditions. Higher Cis-Decalin yield was obtained in supercritical carbon dioxide solvent than under non-supercritical conditions. It was observed that higher hydrogen concentration at the surface in supercritical carbon dioxide solvent led to fast direct hydrogenation of tetralin to Cis-Decalin; the flipping of the intermediate, octalin, to give trans-decalin could be prevented.
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Tuning Cis-Decalin Selectivity in Naphthalene Hydrogenation Over Carbon-supported Rhodium Catalyst Under Supercritical Carbon dioxide
Catalysis Letters, 2006Co-Authors: Norihito Hiyoshi, Chandrashekhar V Rode, Osamu Sato, Tomoya Inoue, Masayuki ShiraiAbstract:Catalytic hydrogenation of naphthalene to decalin was studied over a carbon-supported rhodium catalyst in supercritical carbon dioxide solvent at 333 K, and the results were compared with those in an organic solvent. cis -, trans -Decalin and tetralin were formed from the beginning of the reaction in supercritical carbon dioxide. Higher concentration of hydrogen in carbon dioxide solvent and on the active site, and also the suppression of desorption of partially hydrogenated tetralin molecules from the active site would be responsible for higher selectivity to cis -decalin in supercritical carbon dioxide than that in an organic solvent.
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stereoselective hydrogenation of tetralin to cis decalin over a carbon supported rhodium catalyst in supercritical carbon dioxide solvent
Chemistry Letters, 2006Co-Authors: Norihito Hiyoshi, Eiichi Mine, Chandrashekhar V Rode, Osamu Sato, Masayuki ShiraiAbstract:Cis-Decalin was selectively obtained with high cis/trans ratio (83%) over a carbon-supported rhodium catalyst at 333 K under 6 MPa of hydrogen and 15 MPa of carbon dioxide.