Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts
- Autores
- Braun, Fernando; Di Cosimo, Juana Isabel
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The hydrogen transfer reduction of an α,β-unsaturated ketone, mesityl oxide, was studied on several single oxides in the gas-phase using 2-propanol as a hydrogen source. Selectivity is essentially determined by oxide electronegativity because the reaction proceeds via surface intermediates formed by coordination of 2-propanol and also of C{double bond, long}O and C{double bond, long}C groups of the reactant ketone on the Lewis acid sites provided by the metal cations. Oxides that combine weak Lewis acid cations and strongly basic oxygens such as MgO or Y2O3 yield allylic alcohols as the main reduction products of the gas-phase reaction. Adsorption experiments on MgO monitored by FTIR spectroscopy show that competitive 2-propanol and mesityl oxide adsorption on Mg2+ cations favors the hydrogen transfer process by a concerted Meerwein-Ponndorf-Verley mechanism whereas strong mesityl oxide adsorption causes simultaneous reduction of C{double bond, long}O and C{double bond, long}C bonds with formation of the saturated alcohol. High reaction temperatures strongly affect the stability of the complex reaction intermediates postulated for saturated and allylic alcohol formation, thereby favoring the simpler double bond migration reaction over the reduction reactions. More electronegative oxides such as ZrO2 or Al2O3 tend to promote the C{double bond, long}C bond reduction giving the saturated ketone. On these oxides, 2-propanol decomposes into acetone and molecular hydrogen at high rates, which is detrimental to carbonyl reduction.
Fil: Braun, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
Fil: Di Cosimo, Juana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina - Materia
-
Hydrogen Transfer
Reduction
Alpha,Beta-Unsaturated Ketone
Electronegativity - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/65316
Ver los metadatos del registro completo
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Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalystsBraun, FernandoDi Cosimo, Juana IsabelHydrogen TransferReductionAlpha,Beta-Unsaturated KetoneElectronegativityhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The hydrogen transfer reduction of an α,β-unsaturated ketone, mesityl oxide, was studied on several single oxides in the gas-phase using 2-propanol as a hydrogen source. Selectivity is essentially determined by oxide electronegativity because the reaction proceeds via surface intermediates formed by coordination of 2-propanol and also of C{double bond, long}O and C{double bond, long}C groups of the reactant ketone on the Lewis acid sites provided by the metal cations. Oxides that combine weak Lewis acid cations and strongly basic oxygens such as MgO or Y2O3 yield allylic alcohols as the main reduction products of the gas-phase reaction. Adsorption experiments on MgO monitored by FTIR spectroscopy show that competitive 2-propanol and mesityl oxide adsorption on Mg2+ cations favors the hydrogen transfer process by a concerted Meerwein-Ponndorf-Verley mechanism whereas strong mesityl oxide adsorption causes simultaneous reduction of C{double bond, long}O and C{double bond, long}C bonds with formation of the saturated alcohol. High reaction temperatures strongly affect the stability of the complex reaction intermediates postulated for saturated and allylic alcohol formation, thereby favoring the simpler double bond migration reaction over the reduction reactions. More electronegative oxides such as ZrO2 or Al2O3 tend to promote the C{double bond, long}C bond reduction giving the saturated ketone. On these oxides, 2-propanol decomposes into acetone and molecular hydrogen at high rates, which is detrimental to carbonyl reduction.Fil: Braun, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Di Cosimo, Juana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaElsevier Science2006-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/65316Braun, Fernando; Di Cosimo, Juana Isabel; Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts; Elsevier Science; Catalysis Today; 116; 2 SPEC. ISS.; 8-2006; 206-2150920-5861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2006.01.026info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:50Zoai:ri.conicet.gov.ar:11336/65316instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:45:50.544CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
title |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
spellingShingle |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts Braun, Fernando Hydrogen Transfer Reduction Alpha,Beta-Unsaturated Ketone Electronegativity |
title_short |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
title_full |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
title_fullStr |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
title_full_unstemmed |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
title_sort |
Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts |
dc.creator.none.fl_str_mv |
Braun, Fernando Di Cosimo, Juana Isabel |
author |
Braun, Fernando |
author_facet |
Braun, Fernando Di Cosimo, Juana Isabel |
author_role |
author |
author2 |
Di Cosimo, Juana Isabel |
author2_role |
author |
dc.subject.none.fl_str_mv |
Hydrogen Transfer Reduction Alpha,Beta-Unsaturated Ketone Electronegativity |
topic |
Hydrogen Transfer Reduction Alpha,Beta-Unsaturated Ketone Electronegativity |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
The hydrogen transfer reduction of an α,β-unsaturated ketone, mesityl oxide, was studied on several single oxides in the gas-phase using 2-propanol as a hydrogen source. Selectivity is essentially determined by oxide electronegativity because the reaction proceeds via surface intermediates formed by coordination of 2-propanol and also of C{double bond, long}O and C{double bond, long}C groups of the reactant ketone on the Lewis acid sites provided by the metal cations. Oxides that combine weak Lewis acid cations and strongly basic oxygens such as MgO or Y2O3 yield allylic alcohols as the main reduction products of the gas-phase reaction. Adsorption experiments on MgO monitored by FTIR spectroscopy show that competitive 2-propanol and mesityl oxide adsorption on Mg2+ cations favors the hydrogen transfer process by a concerted Meerwein-Ponndorf-Verley mechanism whereas strong mesityl oxide adsorption causes simultaneous reduction of C{double bond, long}O and C{double bond, long}C bonds with formation of the saturated alcohol. High reaction temperatures strongly affect the stability of the complex reaction intermediates postulated for saturated and allylic alcohol formation, thereby favoring the simpler double bond migration reaction over the reduction reactions. More electronegative oxides such as ZrO2 or Al2O3 tend to promote the C{double bond, long}C bond reduction giving the saturated ketone. On these oxides, 2-propanol decomposes into acetone and molecular hydrogen at high rates, which is detrimental to carbonyl reduction. Fil: Braun, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina Fil: Di Cosimo, Juana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina |
description |
The hydrogen transfer reduction of an α,β-unsaturated ketone, mesityl oxide, was studied on several single oxides in the gas-phase using 2-propanol as a hydrogen source. Selectivity is essentially determined by oxide electronegativity because the reaction proceeds via surface intermediates formed by coordination of 2-propanol and also of C{double bond, long}O and C{double bond, long}C groups of the reactant ketone on the Lewis acid sites provided by the metal cations. Oxides that combine weak Lewis acid cations and strongly basic oxygens such as MgO or Y2O3 yield allylic alcohols as the main reduction products of the gas-phase reaction. Adsorption experiments on MgO monitored by FTIR spectroscopy show that competitive 2-propanol and mesityl oxide adsorption on Mg2+ cations favors the hydrogen transfer process by a concerted Meerwein-Ponndorf-Verley mechanism whereas strong mesityl oxide adsorption causes simultaneous reduction of C{double bond, long}O and C{double bond, long}C bonds with formation of the saturated alcohol. High reaction temperatures strongly affect the stability of the complex reaction intermediates postulated for saturated and allylic alcohol formation, thereby favoring the simpler double bond migration reaction over the reduction reactions. More electronegative oxides such as ZrO2 or Al2O3 tend to promote the C{double bond, long}C bond reduction giving the saturated ketone. On these oxides, 2-propanol decomposes into acetone and molecular hydrogen at high rates, which is detrimental to carbonyl reduction. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-08 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/65316 Braun, Fernando; Di Cosimo, Juana Isabel; Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts; Elsevier Science; Catalysis Today; 116; 2 SPEC. ISS.; 8-2006; 206-215 0920-5861 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/65316 |
identifier_str_mv |
Braun, Fernando; Di Cosimo, Juana Isabel; Catalytic and spectroscopic study of the allylic alcohol synthesis by gas-phase hydrogen transfer reduction of unsaturated ketones on acid-base catalysts; Elsevier Science; Catalysis Today; 116; 2 SPEC. ISS.; 8-2006; 206-215 0920-5861 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2006.01.026 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science |
publisher.none.fl_str_mv |
Elsevier Science |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613433145688064 |
score |
13.070432 |