Relevant bibliographies by topics / Chiral metal salen complexes

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Academic literature on the topic 'Chiral metal salen complexes'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Chiral metal salen complexes"

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Gualandi, Andrea, Francesco Calogero, Simone Potenti, and Pier Giorgio Cozzi. "Al(Salen) Metal Complexes in Stereoselective Catalysis." Molecules 24, no. 9 (May 2, 2019): 1716. http://dx.doi.org/10.3390/molecules24091716.

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Salen ligands are a class of Schiff bases simply obtained through condensation of two molecules of a hydroxyl-substituted aryl aldehyde with an achiral or chiral diamine. The prototype salen, or N,N′-bis(salicylidene)ethylenediamine has a long history, as it was first reported in 1889, and immediately, some of its metal complexes were also described. Now, the salen ligands are a class of N,N,O,O tetradentate Schiff bases capable of coordinating many metal ions. The geometry and the stereogenic group inserted in the diamine backbone or aryl aldehyde backbone have been utilized in the past to efficiently transmit chiral information in a variety of different reactions. In this review we will summarize the important and recent achievements obtained in stereocontrolled reactions in which Al(salen) metal complexes are employed. Several other reviews devoted to the general applications and synthesis of chromium and other metal salens have already been published.
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K. Shiryaev, Andrey. "Recent Advances in Chiral Catalysis Using Metal Salen Complexes." Current Organic Chemistry 16, no. 15 (July 1, 2012): 1788–807. http://dx.doi.org/10.2174/138527212802651340.

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Shaw, Subrata, and James D. White. "Asymmetric Catalysis Using Chiral Salen–Metal Complexes: Recent Advances." Chemical Reviews 119, no. 16 (June 11, 2019): 9381–426. http://dx.doi.org/10.1021/acs.chemrev.9b00074.

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O'Connor, Kenneth J., Shiow-Jyi Wey, and Cynthia J. Burrows. "Alkene aziridination and epoxidation catalyzed by chiral metal salen complexes." Tetrahedron Letters 33, no. 8 (February 1992): 1001–4. http://dx.doi.org/10.1016/s0040-4039(00)91844-6.

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Belokon, Yuri N., Michael North, Vadim S. Kublitski, Nikolai S. Ikonnikov, Pavel E. Krasik, and Viktor I. Maleev. "Chiral salen-metal complexes as novel catalysts for asymmetric phase transfer alkylations." Tetrahedron Letters 40, no. 33 (August 1999): 6105–8. http://dx.doi.org/10.1016/s0040-4039(99)01214-9.

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Canali, Laetitia, and David C. Sherrington. "Utilisation of homogeneous and supported chiral metal(salen) complexes in asymmetric catalysis." Chemical Society Reviews 28, no. 2 (1999): 85–93. http://dx.doi.org/10.1039/a806483k.

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O'CONNOR, K. J., S. J. WEY, and C. J. BURROWS. "ChemInform Abstract: Alkene Aziridination and Epoxidation Catalyzed by Chiral Metal Salen Complexes." ChemInform 23, no. 37 (August 21, 2010): no. http://dx.doi.org/10.1002/chin.199237060.

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Liu, Tao, Wen-Juan Ruan, Jing Nan, and Zhi-Ang Zhu. "CD Spectroscopic Study on the Molecular Recognition of Chiral Salen-Metal Complexes." Chinese Journal of Chemistry 21, no. 7 (August 26, 2010): 751–55. http://dx.doi.org/10.1002/cjoc.20030210709.

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Patti, Angela, Sonia Pedotti, Francesco Ballistreri, and Giuseppe Sfrazzetto. "Synthesis and Characterization of Some Chiral Metal-Salen Complexes Bearing a Ferrocenophane Substituent." Molecules 14, no. 11 (October 26, 2009): 4312–25. http://dx.doi.org/10.3390/molecules14114312.

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Canali, Laetitia, and David C. Sherrington. "ChemInform Abstract: Utilization of Homogeneous and Supported Chiral Metal(salen) Complexes in Asymmetric Catalysis." ChemInform 30, no. 21 (June 15, 2010): no. http://dx.doi.org/10.1002/chin.199921284.

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Dissertations / Theses on the topic "Chiral metal salen complexes"

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Tucker, S. C. "Towards novel ligands for catalytic asymmetric oxidation." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242038.

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Zidelmal, Nacim. "SILIPOLYSALEN : étude du greffage par polymérisation contrôlée de complexes de salen sur silicium pour une application en catalyse asymétrique hétérogène." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS058.

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Les complexes métalliques chiraux de type salen sont connus pour la diversité de leur utilisation en catalyse conduisant à la préparation de nombreux synthons énantio-enrichis. Conformément au concept de chimie verte, l'un des principaux objectifs est d'établir une procédure efficace pour la récupération et la réutilisation de ces catalyseurs. Dans ce contexte, l'objectif de ce travail est de fonctionnaliser la surface du silicium par greffage covalent de ces catalyseurs par polymérisation contrôlée notamment la polymérisation radicalaire par transfert d’atome (ATRP) pour leur récupération et leur réutilisation. Ainsi, des copolymères de styrène contenant 5 à 50 mol% d’un comonomère salen dissymétrique ont été synthétisés par ATRP en solution. Le caractère contrôlé des polymérisations n’est obtenu que lorsque l’incorporation du comonomère salen est inférieure ou égale à 10 mol %.Après complexation au cobalt, les polymères correspondants se sont révélés capables de réaliser une activation coopérative efficace, conduisant au produit ciblé avec des rendements et des sélectivités élevés en tant que catalyseurs dans la réaction de dédoublement cinétique hydrolytique de l’épibromohydrine.Nous avons également réalisé la polymérisation du styrène sur la surface de silicium par ATRP après greffage de l’amorceur. Plusieurs méthodes de greffage de l’amorceur ont été utilisées soit d’une manière directe à partir de la surface hydrogénée, soit indirecte à partir d’une surface acide ou ester. Le styrène a été ensuite efficacement polymérisé en masse avec succès de façon contrôlée sur le silicium, avec des épaisseurs de couche comprise entre 9 et 29 nm déterminées par ellipsométrie et microscopie à force atomique
Chiral metal complexes of salen type are known for their efficient catalytic activity leading to the preparation of enantioselective enriched synthons. In accordance with the concept of green chemistry, one of the main challenge is to establish a procedure for the recovery and reuse of these catalysts. In this context, the objective of this work is to functionalize the silicon surface by grafting these catalysts by controlled polymerization especially by Atom Transfer Radical Polymerization (ATRP) to facilitate their recovery and reuse.Thus, styrene copolymers containing 5 to 50 mol % of an disymmetric salen comonomer were synthesized by ATRP in solution. The controlled nature of the polymerizations is obtained only when the incorporation of the salen comonomer is less than or equal to 10%.After complexation with cobalt, these complexes are shown to be capable of effective cooperative activation, leading to the targeted product with high yields and selectivities as catalysts in Hydrolytic Kinetic Resolution (HKR) of epibromohydrin.Constantio Constantini fratre imperatoris, matreque Galla.We also reported the polymerization of styrene on the silicon surface by ATRP after grafting of the initiator. Several methods of initiator grafting have been used either directly from the hydrogenated surface or indirectly from an acid or ester surface. Styrene has been successfully mass polymerized in a controlled manner on silicon with thicknesses of 9-29 nm of the layer obtained by ellipsometry and Atomic Force Microscopy
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Zhang, Weiqiang. "Synthesis of novel chiral pyrrolidine-type (salen)Mn(III) complexes." Thesis, Swansea University, 2006. https://cronfa.swan.ac.uk/Record/cronfa42403.

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The thesis reports the total syntheses of new chiral pyrrolidine-type salen ligands 5.4 and their corresponding Mn(III) complexes 5.5. The salen ligands were synthesized by condensation of tras-(3R,4R)-diaminopyrrolidine (3.12) or trans-(3R,4R)-1-benzyl-3,4-diaminopyrrolidine (3.10) with two equivalents of (R)-3-formyl-2-hydroxy-2'-phenyl-1,1'-binaphthalene [(R)-4.9]. The salen ligands were transformed to their corresponding Mn(III) complexes following a general procedure. The catalytic performances of the synthesized (salen)Mn(III) complexes in asymmetric epoxidation of 1,2-dihydronaphthalene were tested. In chapter 1, a review of asymmetric epoxidation of alkenes is given. Emphasis is placed on the development and some of the important designs of chiral salen ligands and their corresponding (salen)Mn(III) complexes. In chapter 2, the nature of the research project is outlined. In chapter 3, the syntheses of trans-(3R,4R)-diaminopyrrolidine trihydrochloride salt (3.9), trans-(3R,4R)-1-benzyl-3,4-diaminopyrrolidine (3.10) and its trihydrochloride salt (3.11) are reported. These compounds were prepared from (2R,3R)-(-i-)-tartaric acid via multi-step syntheses. Extensive studies on optimization of these transformations are reported. Chapter 4 records the synthesis of (R)-3-formyl-2-hydroxy-2'-phenyl-1,1'-binaphthalene [(R)-4.9] from 2-naphthol via a seven-step synthetic procedure. Extensive studies on these transformations are described, especially on the oxidative coupling of 2-naphthol and on the optical resolution of racemic 2,2'-dihydroxy-1,1'-binaphthalene. In chapter 5, the preparations of salen ligands 5.4 and their corresponding Mn(III) complexes 5.5 are reported. The applications of synthesized Mn(III) complexes in asymmetric epoxidation of 1,2-dihydronaphthalene were carried out. In chapter 6, an overall conclusion of the work is given.
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Jones, P. "Studies of chiral metal complexes." Thesis, Bucks New University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373593.

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Harrison, Stephen Anthony. "Novel chiral cyclopentadienyl metal complexes." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442873.

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Zieleniuk, Candace A. "Anion binding and catalytic studies of metal salen complexes." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024865.

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Williamson, Courtney Meghann. "Asymmetric catalysis of cyanide addition reactions using metal(salen) complexes." Thesis, University of Newcastle Upon Tyne, 2011. http://hdl.handle.net/10443/1168.

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Chiral cyanohydrins and α-aminonitriles are versatile intermediates and are of great importance to the pharmaceutical industry due to the ability to convert them into useful chemicals via simple chemical transformations. Chiral cyanohydrins and α-aminonitriles can be obtained from asymmetric cyanohydrin synthesis and asymmetric Strecker reactions respectively. In this project, bimetallic aluminium(salen) complex 1 was studied extensively and was shown to be very active in cyanohydrin synthesis using trimethylsilylcyanide (TMSCN), giving the cyanohydrin trimethylsilyl ether derived from benzaldehyde with 89% (S) enantioselectivity and 80% conversion after 18 hours at -40 oC. A variety of substituted benzaldehydes were screened giving moderate to excellent enantioselectivities. Ketones were also shown to be substrates when used in this catalytic system. Extensive kinetic studies of complex 1 gave the rate equation; rate = k[TMSCN][Ph3PO][1] which is zero order with respect to benzaldehyde. A Hammett study using complex 1 showed that this catalytic system was dominated by Lewis basic catalysis, resulting from the activation of trimethylsilylcyanide by triphenylphosphine oxide. The catalyst was then responsible for the chirality of the product rather than the activation of the aldehyde. A variety of other titanium and vanadium(salen) complexes, containing various substituents on the aromatic ring of the salen ligand were synthesised and screened in the Strecker reaction and cyanohydrin synthesis under different reaction conditions. Enantiomeric excesses of 10-95% (R and S) were achieved with conversions of 10-100% for both reactions.
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Achard, Thierry R. J. "Asymmetric catalysis of enolate reactions induced by metal(salen) complexes." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427192.

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Bridgewater, Brian Michael. "Sterically hindered chiral transition metal complexes." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/5022/.

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This thesis describes the synthesis, characterization and study of a series of organometallic compounds which all contain the same new ligand, l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyl. The ligand forms a chiral complex once coordinated, and is relatively bulky when compared with ligands such as cyclopentadienyl or 4,5,6,7-tetrahydroindenyl.Chapter one of this thesis introduces cyclopentadienyl ligand chirality, cyclopentadienyl metal complex chirality and sterically demanding cyclopentadienyl systems. The synthesis and chemistry of tetrahydroindenes and some applications of chiral cyclopentadienyl metal complexes and their bulky analogues are also reviewed. Chapter two describes modifications to a literature preparation of the tetrahydroindenone precursor of the new tetrahydroindenyl ligand which lead to higher yields. The synthesis of the ligand itself is described, as well as the synthesis of a benzylidene-substituted hexahydroindene, which demonstrates a limitation in the flexibility of the synthetic route chosen. The synthesis, characterization and various properties of the following iron(II) compounds are discussed in chapter two; bis-l-phenyl-3-methyl- 4,5,6,7-tetrahydroindenyl iron (II), 2.3, l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyl iron(II) dicarbonyl dimer, 2.4, and l-phenyl-3-methyl-4,5,6,7-tetrahydroindaiyl methyl dicarbonyl iron(II), 2.5. For all these iron complexes, the solid state molecular structures and the absolute configuration of the chiral ligand were determined using single crystal X-ray d iffraction. For 23 and 2.4, three isomers are possible, two enantiomers that are collectively termed the rac-isomer and a third isomer, the meso- isomer. Cyclic voltammetric studies on 2.3 indicate that it has a reversible one electron oxidation at 0.187 V (with respect to a non-aqueous Ag/AgCl standard electrode). The difference between this and the reversible one electron oxidation for (η-C(_5)H(_5))(_2)Fe (with respect to the same standard) is -0.314 V, therefore 2.3 is shown to be much more easily oxidized than (η-C(_5)H(_5))(_2)Fe. The solution-state infi-a-red spectrum of 2.4 is explained, with reference to a literature analysis of the unsubstituted analogue [CpFe(CO)(_2)](_2). The steric forces present in the various molecular environments are discussed in connection with the degree of phenyl-ring tilt relative to the cyclopentadienyl mean plane and the deviation of the other cyclopentadimyl substituents away from the metal centre. Subsequent reactions of compounds 2.4 and 2.5 are described. Attempts to make linked analogues of the new ligand are summarized in chapter two. In chapter three, two Zr(rV) compounds are prepared, bis (l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyi) zirconium(fV) dichloride, 3.1, and bis (l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyl) dimethyl zirconium(TV), 3.2. Upon crystallization, rac-3.1 spontaneously resolves into crystals containing only one enantiomer. The similarities and differences in the spectroscopic data for the iron(n) compounds of chapter two and the zirconium(IV) compounds of chapter three are discussed and possible explanations offered . The solid state molecular structures of 3.1 and 3.2 were determined by single crystal X-ray diffraction. Experimental details are given in chapter four, whilst the characterizing data are presented in chapter five. Details of the X-ray structure determinations are given in Appendix A.
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Emseis, Paul, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Non-classical bonding in chiral metal complexes." THESIS_CSTE_SFH_Emseis_P.xml, 2003. http://handle.uws.edu.au:8081/1959.7/557.

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Intramolecular non-covalent interactions between aromatic ligands in chiral Ru(II) and Co(III) complexes have been investigated in this study. Several investigations were carried out and findings given. The results of the study, which demonstrate the significance of non-covalent interactions involving aromatic residues to the determination of the molecular conformation, serve to highlight the suitability of simple chiral metal complexes to act as models for interactions
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Book chapters on the topic "Chiral metal salen complexes"

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Zhang, Wen-Zhen, and Xiao-Bing Lu. "Chiral Salen Complexes." In Privileged Chiral Ligands and Catalysts, 257–93. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527635207.ch7.

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Pfaltz, A. "Enantioselective Catalysis with Chiral Metal Complexes." In Stereoselective Synthesis, 15–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78496-5_2.

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Maccarrone, G., E. Rizzarelli, and G. Vecchio. "Chiral Recognition by Functionalized Cyclodextrin Metal Complexes." In Transition Metals in Supramolecular Chemistry, 351–70. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-015-8380-0_19.

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Uemura, Motokazu. "Stereoselective Synthesis of Axially Chiral Biaryls Utilizing Planar Chiral (Arene)chromium Complexes." In Selective Reactions of Metal-Activated Molecules, 131–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-00975-8_18.

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Yamashita, Yasuhiro, Tetsu Tsubogo, and Shū Kobayashi. "Chiral Alkaline Earth Metal Complexes in Asymmetric Catalysis." In Topics in Organometallic Chemistry, 121–45. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/3418_2015_144.

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Magistrato, Alessandra, Antonio Togni, Ursula Röthlisberger, and Tom K. Woo. "Enantioselective Hydrosilylation by Chiral Pd Based Homogeneous Catalysts with First-Principles and Combined QM/MM Molecular Dynamics Simulations." In Catalysis by Metal Complexes, 213–52. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/0-306-47718-1_9.

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Elias, Horst, Frank Stock, Waldemar Adam, Catherine Mitchell, Margareta Neuburger, and Markus Neuburger. "Salen-type Oxo Vanadium Complexes as Catalysts for Sulfoxidation and Epoxidation Reactions with Hydroperoxides." In Selective Reactions of Metal-Activated Molecules, 251–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-00975-8_38.

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Nag, Ahindra. "Enantiomerically Pure Compounds by Enantioselective Synthetic Chiral Metal Complexes." In Asymmetric Synthesis of Drugs and Natural Products, 75–131. Boca Raton : CRC Press, 2018.: CRC Press, 2018. http://dx.doi.org/10.9774/gleaf.9781315302317-3.

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Peters, Dennis G., Kent S. Alleman, and Michael J. Samide. "Catalytic Reduction of Halogenated Organic Compounds with Electrogenerated Metal(I) Salen Complexes." In Novel Trends in Electroorganic Synthesis, 373–76. Tokyo: Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-65924-2_113.

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Schenk, W. A., M. Dürr, B. Steinmetz, W. Adam, and C. R. Saha-Möller. "Enantioselective Oxidation of Thioethers Using Ruthenium Complexes as Chiral Auxiliaries." In Selective Reactions of Metal-Activated Molecules, 245–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-00975-8_36.

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Conference papers on the topic "Chiral metal salen complexes"

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Romero, María J., Sandra Fernández-Fariña, Luis M. González-Barcia, Rosa Pedrido, Ana M. González-Noya, and Marcelino Maneiro. "Synthesis of two asymmetric half-salen imine-type ligands as precursors of polynuclear metal complexes." In The 21st International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2017. http://dx.doi.org/10.3390/ecsoc-21-04752.

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