New Subtrate Classes In Iridium Catalyzed Asymmetric Hydrogenation
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New Subtrate Classes In Iridium Catalyzed Asymmetric Hydrogenation
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Author : Maurizio Bernasconi
language : en
Publisher: Cuvillier Verlag
Release Date : 2014-01-30
New Subtrate Classes In Iridium Catalyzed Asymmetric Hydrogenation written by Maurizio Bernasconi and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-01-30 with Science categories.
The main aim of the research presented in this thesis was to expand the substrate scope of the iridium-catalyzed asymmetric hydrogenation, which represents an extremely useful methodology for the enantioselective synthesis of chiral molecules.While this chemistry has been developed and investigated mainly for the hydrogenation of unfunctionalized olefins, so far only little attention has been given to functionalized olefins. Therefore, the different research projects presented in this thesis dealt with the application of iridium catalysts to the reduction of particularly valuable substrates that are difficult to hydrogenate enantioselectively with other methods. The first chapter of this thesis gives a general introduction on asymmetric hydrogenation and the role of iridium catalysts in this context. The following two chapters deal with the investigation of new substrates in the iridium-catalyzed asymmetric hydrogenation using various N,Pligands developed in the Pfaltz group,and give an account of the superior results that have been obtained with such catalysts compared to thoserepresenting the state-of-the-art. In particular, chapter twoconcerns the reduction of vinylsilanes, for which the judicious choice of the best catalyst for each specific substrate was required to achieve good results in term of both chemical and optical yield. On the contrary, a pyridinyl phosphitine bearing a 2,6-difluorophenyl group on the oxazoline ringwas best suited for a broad array of 2-alkyl- and aryl- substituted maleic acid dimethyldiester, as reported in chapter three. Such process turned out to be enantioconvergent, allowing the hydrogenation of mixtures of maleates and fumarates in high enantiomeric excesses. In chapter fourthe deployment of environmentally friendly solvents such as THF and 2-MeTHF in the iridium-catalyzed asymmetric hydrogenation of 3,3-disubstituted allylic alcohols is described. Finally, chapter five of this dissertation deals with the development of new NHC ligands for the iridium-catalyzed asymmetric hydrogenation of acid-labile substrates such as tert-butyloxycarbonyl protected allylic alcohols. Experimental details and characterization of the substances discussed in the main body of this manuscript is reported in the experimental section that constitutes chapter six.
New Subtrate Classes In Iridium Catalyzed Asymmetric Hydrogenation
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Author : Maurizio Bernasconi
language : en
Publisher:
Release Date : 2014
New Subtrate Classes In Iridium Catalyzed Asymmetric Hydrogenation written by Maurizio Bernasconi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Iridium Catalyzed Asymmetric Hydrogenation Of Furan Derivatives And Thiophene 1 1 Dioxides
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Author : Larissa Pauli
language : en
Publisher:
Release Date : 2015-10
Iridium Catalyzed Asymmetric Hydrogenation Of Furan Derivatives And Thiophene 1 1 Dioxides written by Larissa Pauli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-10 with categories.
Iridium Catalyzed Asymmetric Hydrogenation
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Author : Adnan Ganić
language : de
Publisher:
Release Date : 2013
Iridium Catalyzed Asymmetric Hydrogenation written by Adnan Ganić and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
N Heterocyclic Carbene Ligands For Iridium Catalysed Asymmetric Hydrogenation
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Author : Steve Nanchen
language : en
Publisher: Cuvillier Verlag
Release Date : 2005
N Heterocyclic Carbene Ligands For Iridium Catalysed Asymmetric Hydrogenation written by Steve Nanchen and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Asymmetric Hydrogenation Of Alkenes With Cationic Iridium I Complexes Of 2 Phosphino 1 Aminoferrocene Ligands
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Author : Lori Van Belle
language : en
Publisher:
Release Date : 2011
Asymmetric Hydrogenation Of Alkenes With Cationic Iridium I Complexes Of 2 Phosphino 1 Aminoferrocene Ligands written by Lori Van Belle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Reactivity And Selectivity Studies In Iridium Catalyzed Asymmetric Hydrogenation
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Author : Bram B. C. Peters
language : en
Publisher:
Release Date : 2023
Reactivity And Selectivity Studies In Iridium Catalyzed Asymmetric Hydrogenation written by Bram B. C. Peters and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
Iridium Catalysis
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Author : Pher G. Andersson
language : en
Publisher: Springer
Release Date : 2011-01-04
Iridium Catalysis written by Pher G. Andersson and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01-04 with Science categories.
From the contents: Robert H Crabtree: Introduction and History. - Montserrat Diéguez, Oscar Pàmies and Carmen Claver: Iridium-catalysed hydrogenation using phosphorous ligands. - David H. Woodmansee and Andreas Pfaltz: Iridium Catalyzed Asymmetric Hydrogenation of Olefins with Chiral N,P and C,N Ligands. - Ourida Saidi and Jonathan M J Williams: Iridium-catalyzed Hydrogen Transfer Reactions. - John F. Bower and Michael J. Krische: Formation of C-C Bonds via Iridium Catalyzed Hydrogenation and Transfer Hydrogenation. - Jongwook Choi, Alan S. Goldman: Ir-Catalyzed Functionalization of CH Bonds. - Mark P. Pouy and John F. Hartwig: Iridium-Catalyzed Allylic Substitution. - Daniel Carmona and Luis A. Oro: Iridium-catalyzed 1.3-dipolar cycloadditions.
Study Of Chiral Iridium N P Ligand Complexes As Catalysts For The Asymmetric Hydrogenation Of Different Substrate Classes
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Author : Marc-André Müller
language : de
Publisher:
Release Date : 2014
Study Of Chiral Iridium N P Ligand Complexes As Catalysts For The Asymmetric Hydrogenation Of Different Substrate Classes written by Marc-André Müller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Iridium Catalyzed Asymmetric Hydrogenation
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Author : Robin Scheil
language : en
Publisher:
Release Date : 2016
Iridium Catalyzed Asymmetric Hydrogenation written by Robin Scheil and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.