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Samadi S, Ashouri A, Samadi M. Synthesis of Chiral Allylic Esters by Using the New Recyclable Chiral Heterogeneous Oxazoline-Based Catalysts. ACS OMEGA 2020; 5:22367-22378. [PMID: 32923794 PMCID: PMC7482298 DOI: 10.1021/acsomega.0c02764] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
A new class of recyclable supported chiral heterogeneous ligands has been synthesized by the reaction of functionalized mesoporous SBA-15 with aliphatic- and aromatic-substituted chiral amino oxazoline ligands. The obtained chiral heterogeneous ligands were characterized by several techniques such as Fourier transform infrared, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and BET-BJH. The application of these new heterogeneous ligands in copper-catalyzed asymmetric allylic oxidation of olefins by using perester showed better yields up to 95% and better enantioselectivities up to 96% compared to the corresponding homogeneous catalysts. These findings can be considered as an important step in the advancement of green chemistry. Investigation of the recyclability of the catalysts confirmed that they were easily recovered and reused eight times without significant losses in reactivity, yield, and enantioselectivity.
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Affiliation(s)
- Saadi Samadi
- Laboratory of Asymmetric Synthesis,
Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Akram Ashouri
- Laboratory of Asymmetric Synthesis,
Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Mojgan Samadi
- Laboratory of Asymmetric Synthesis,
Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj 66177-15175, Iran
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2
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Designing chiral amido-oxazolines as new chelating ligands devoted to direct Cu-catalyzed oxidation of allylic C H bonds in cyclic olefins. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Heravi MM, Zadsirjan V, Masoumi B, Heydari M. Organometal-catalyzed asymmetric Friedel-Crafts reactions. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Pilsl LKA, Ertl T, Reiser O. Enantioselective Three-Step Synthesis of Homo-β-proline: A Donor–Acceptor Cyclopropane as Key Intermediate. Org Lett 2017; 19:2754-2757. [DOI: 10.1021/acs.orglett.7b01111] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ludwig K. A. Pilsl
- Institut für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Thomas Ertl
- Institut für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institut für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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5
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Bellemin-Laponnaz S, Achard T, Bissessar D, Geiger Y, Maisse-François A. Synthesis and application of dynamic self-supported enantioselective catalysts. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.10.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Feldman RA, Fraile JM. Non-covalent immobilization of chiral copper complexes on Al-MCM41: Effect of the nature of the ligand. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.05.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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7
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Reiser O. Catalytic Conversion of Furans and Pyrroles to Natural Products and Analogues Utilizing Donor-Acceptor Substituted Cyclopropanes as Key Intermediates. Isr J Chem 2016. [DOI: 10.1002/ijch.201500103] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Oliver Reiser
- Institut für Organische Chemie; Universität Regensburg; 93053 Regensburg Germany
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8
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Frensch G, Labes R, Wosch CL, Munaretto LDS, Salomé KS, Guerrero PG, Marques FA. New chiral ligands derived from (+) and (−)-α-pinene for the enantioselective addition of diethylzinc to aldehydes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Dauer DR, Flügge M, Herbst-Irmer R, Stalke D. Bis-(benzothiazol-2-yl)-amines and their metal amides: a structural comparison in the solid state. Dalton Trans 2016; 45:6136-48. [DOI: 10.1039/c5dt03911h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of functionalised bis-(benzothiazol-2-yl)-amine ligands and the related dimethylaluminium amides were synthesised and characterised. The solid state structural comparison reveals various coordination motifs, specific folding parameters and hydrogen bonding patterns in detail and guide the way to future Janus head ligand design.
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Affiliation(s)
- David-R. Dauer
- Institut für Anorganische Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen
- Germany
| | - Melchior Flügge
- Institut für Anorganische Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen
- Germany
| | - Regine Herbst-Irmer
- Institut für Anorganische Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen
- Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen
- Germany
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10
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Asymmetric cyclopropanation in ionic liquids promoted by dicopper complexes of ditopic ligands. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.04.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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García JI, García J, Herrerías CI, Mayoral JA, Miñana AC, Sáenz C. Polytopic Bis(oxazoline)-Based Ligands for the Development of Recoverable Catalytic Systems Applied to the Cyclopropanation Reaction. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301510] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Fraile JM, García N, Herrerías CI. Support Effect on Stereoselectivities of Vinylogous Mukaiyama–Michael Reactions Catalyzed by Immobilized Chiral Copper Complexes. ACS Catal 2013. [DOI: 10.1021/cs400743n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José M. Fraile
- Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, C/Pedro Cerbuna, 12, 50009-Zaragoza, Spain
| | - Nuria García
- Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, C/Pedro Cerbuna, 12, 50009-Zaragoza, Spain
| | - Clara I. Herrerías
- Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, C/Pedro Cerbuna, 12, 50009-Zaragoza, Spain
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14
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Synthesis and characterization of molecularly imprinted polymers with metallic zinc center for enrofloxacin recognition. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Jiménez-Osés G, Vispe E, Roldán M, Rodríguez-Rodríguez S, López-Ram-de-Viu P, Salvatella L, Mayoral JA, Fraile JM. Stereochemical Outcome of Copper-Catalyzed C–H Insertion Reactions. An Experimental and Theoretical Study. J Org Chem 2013; 78:5851-7. [DOI: 10.1021/jo400415b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gonzalo Jiménez-Osés
- Department of Chemistry
and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095-1569, United States
| | - Eugenio Vispe
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Marta Roldán
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Sergio Rodríguez-Rodríguez
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Pilar López-Ram-de-Viu
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Luis Salvatella
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - José A. Mayoral
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - José M. Fraile
- Instituto de Síntesis
Química y Catálisis Homogénea, Facultad de Ciencias, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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16
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Silva AR, Guimarães V, Carvalho AP, Pires J. The role of the support properties in the catalytic performance of an anchored copper(ii) aza-bis(oxazoline) in mesoporous silicas and their carbon replicas. Catal Sci Technol 2013. [DOI: 10.1039/c2cy20638b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Silva AR, Carneiro L, Carvalho AP, Pires J. Asymmetric benzoylation of hydrobenzoin by copper(ii) bis(oxazoline) anchored onto ordered mesoporous silicas and their carbon replicas. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00232b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Glen PE, O'Neill JA, Lee AL. Synthesis of a C1-symmetric Box macrocycle and studies towards active-template synthesis of mechanically planar chiral rotaxanes. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.069] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Angulo B, García JI, Herrerías CI, Mayoral JA, Miñana AC. Bis(oxazoline)-Based Coordination Polymers: A Recoverable System for Enantioselective Henry Reactions. J Org Chem 2012; 77:5525-32. [DOI: 10.1021/jo3005974] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Beatriz Angulo
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH) and Instituto Universitario de Catálisis
Homogénea (IUCH), CSIC - Universidad de Zaragoza, E-50009 Zaragoza, Spain
| | - José I. García
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH) and Instituto Universitario de Catálisis
Homogénea (IUCH), CSIC - Universidad de Zaragoza, E-50009 Zaragoza, Spain
| | - Clara I. Herrerías
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH) and Instituto Universitario de Catálisis
Homogénea (IUCH), CSIC - Universidad de Zaragoza, E-50009 Zaragoza, Spain
| | - José A. Mayoral
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH) and Instituto Universitario de Catálisis
Homogénea (IUCH), CSIC - Universidad de Zaragoza, E-50009 Zaragoza, Spain
| | - Ana C. Miñana
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH) and Instituto Universitario de Catálisis
Homogénea (IUCH), CSIC - Universidad de Zaragoza, E-50009 Zaragoza, Spain
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20
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Aldea L, Delso I, Hager M, Glos M, García JI, Mayoral JA, Reiser O. A reusable enantioselective catalytic system for the Kharasch–Sosnovsky allylic oxidation of alkenes based on a ditopic azabis(oxazoline) ligand. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Chinnusamy T, Yudha SS, Hager M, Kreitmeier P, Reiser O. Application of metal-based reagents and catalysts in microstructured flow devices. CHEMSUSCHEM 2012; 5:247-55. [PMID: 22275318 DOI: 10.1002/cssc.201100444] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Indexed: 05/23/2023]
Abstract
Over the years, organic synthesis has witnessed several improvements through the development of new chemical transformations or more efficient reagents for known processes. Likewise, technological advances, aiming at speeding up reactions and facilitating their work-up, have established themselves in academic as well as in industrial laboratories. In this Minireview, we highlight very recent developments in flow chemistry, focusing on organometallic reagents and catalysts. First, we describe reactions with homogeneous catalysts immobilized on different support materials using the concept of packed bed reactors. In the last chapter, we will discuss applications that utilize organometallic reagents.
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22
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Aldea L, García JI, Mayoral JA. Multiphase enantioselective Kharasch–Sosnovsky allylic oxidation based on neoteric solvents and copper complexes of ditopic ligands. Dalton Trans 2012; 41:8285-9. [DOI: 10.1039/c2dt30352c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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23
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García JI, Herrerías CI, López-Sánchez B, Mayoral JA, Reiser O. Polytopic Oxazoline-Based Chiral Ligands for Cyclopropanation Reactions: A New Strategy to Prepare Highly Recyclable Catalysts. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100213] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Fraile JM, López-Ram-de-Viu P, Mayoral JA, Roldán M, Santafé-Valero J. Enantioselective C–H carbene insertions with homogeneous and immobilized copper complexes. Org Biomol Chem 2011; 9:6075-81. [DOI: 10.1039/c1ob05499f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Lang K, Park J, Hong S. Development of Bifunctional Aza-Bis(oxazoline) Copper Catalysts for Enantioselective Henry Reaction. J Org Chem 2010; 75:6424-35. [DOI: 10.1021/jo1009867] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kai Lang
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200
| | - Jongwoo Park
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200
| | - Sukwon Hong
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200
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26
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Snyder SA, Treitler DS, Schall A. A two-step mimic for direct, asymmetric bromonium- and chloronium-induced polyene cyclizations. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.03.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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The importance of 1:1 and 1:2 metal–ligand species in chiral copper(II)–bis(oxazoline) complexes for catalytic activity. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.03.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Naik A, Meina L, Zabel M, Reiser O. Efficient Aerobic Wacker Oxidation of Styrenes Using Palladium Bis(isonitrile) Catalysts. Chemistry 2010; 16:1624-8. [DOI: 10.1002/chem.200901560] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Naik A, Maji T, Reiser O. Iron(ii)–bis(isonitrile) complexes: novel catalysts in asymmetric transfer hydrogenations of aromatic and heteroaromatic ketones. Chem Commun (Camb) 2010; 46:4475-7. [DOI: 10.1039/c0cc00508h] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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García JI, Jiménez-Osés G, López-Sánchez B, Mayoral JA, Vélez A. Stereoselectivity induced by support confinement effects. Aza-pyridinoxazolines: A new family of C1-symmetric ligands for copper-catalyzed enantioselective cyclopropanation reactions. Dalton Trans 2010; 39:2098-107. [DOI: 10.1039/b919274c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Rasappan R, Olbrich T, Reiser O. Combining Fluorous and Triazole Moieties for the Tagging of Chiral Azabis(oxazoline) Ligands. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900129] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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García JI, López-Sánchez B, Mayoral JA. Linking Homogeneous and Heterogeneous Enantioselective Catalysis through a Self-Assembled Coordination Polymer. Org Lett 2008; 10:4995-8. [DOI: 10.1021/ol802071n] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José I. García
- Department of Organic Chemistry, Instituto de Ciencia de Materiales de Aragón and Instituto Universitario de Catálisis Homogénea, Facultad de Ciencias, Calle Pedro Cerbuna, 12, CSIC-University of Zaragoza, E-50009 Zaragoza, Spain
| | - Beatriz López-Sánchez
- Department of Organic Chemistry, Instituto de Ciencia de Materiales de Aragón and Instituto Universitario de Catálisis Homogénea, Facultad de Ciencias, Calle Pedro Cerbuna, 12, CSIC-University of Zaragoza, E-50009 Zaragoza, Spain
| | - José A. Mayoral
- Department of Organic Chemistry, Instituto de Ciencia de Materiales de Aragón and Instituto Universitario de Catálisis Homogénea, Facultad de Ciencias, Calle Pedro Cerbuna, 12, CSIC-University of Zaragoza, E-50009 Zaragoza, Spain
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33
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Schätz A, Rasappan R, Hager M, Gissibl A, Reiser O. Dependence of Enantioselectivity on the Ligand/Metal Ratio in the Asymmetric Michael Addition of Indole to Benzylidene Malonates: Electronic Influence of Substrates. Chemistry 2008; 14:7259-65. [DOI: 10.1002/chem.200800508] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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35
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Jana PP, Sarma R, Baruah JB. Reduction of α,β-unsaturated carbonyl compounds by palladium(II) and nickel(II) complexes having nitrogen-containing ligands. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.04.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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37
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Zocher E, Sigrist R, Chen P. Threshold CID Investigation of Isomeric Cu(I) Azabox Complexes. Inorg Chem 2007; 46:11366-70. [DOI: 10.1021/ic701688t] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eva Zocher
- Laboratorium für Organische Chemie, ETH Zürich, Switzerland
| | | | - Peter Chen
- Laboratorium für Organische Chemie, ETH Zürich, Switzerland
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38
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Fraile JM, García JI, Gissibl A, Mayoral JA, Pires E, Reiser O, Roldán M, Villalba I. C1-Symmetric VersusC2-Symmetric Ligands in Enantioselective Copper–Bis(oxazoline)-Catalyzed Cyclopropanation Reactions. Chemistry 2007; 13:8830-9. [PMID: 17674345 DOI: 10.1002/chem.200700681] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A thorough experimental and theoretical study of the enantioselective cyclopropanation of alkenes catalyzed by chiral bis(oxazoline)- and azabis(oxazoline)-copper complexes, which comprise a new family of ligands that lack C2 symmetry, has been conducted. Surprisingly high enantioselectivities were observed with some of these ligands, which were rationalized on the basis of molecular modeling studies. The course of the asymmetric induction in connection with ligand symmetry and the implications for supported enantioselective catalysts are discussed.
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Affiliation(s)
- José M Fraile
- Departamento de Química Orgánica, ICMA, CSIC-Universidad de Zaragoza and IUCH, Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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39
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Gissibl A, Padié C, Hager M, Jaroschik F, Rasappan R, Cuevas-Yañez E, Turrin CO, Caminade AM, Majoral JP, Reiser O. Synthesis and Application of Phosphorus Dendrimer Immobilized Azabis(oxazolines). Org Lett 2007; 9:2895-8. [PMID: 17602491 DOI: 10.1021/ol071128p] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phosphorus dendrimer immobilized azabis(oxazoline) ligands can be efficiently synthesized up to the third generation with 48 ligand molecules being attached to the periphery using click chemistry. The so-assembled macromolecules were evaluated in copper(II)-catalyzed asymmetric benzoylations, showing good yields and enantioselectivities. Moreover, the copper(II)-catalysts could be readily recovered and reused in several cycles. The globular structure of the dendritic ligands seems to prevent interference of the triazole moieties in the catalysis, contrasting MeOPEG or polystyrene bound ligands of the same type.
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Affiliation(s)
- Anja Gissibl
- Institut für Organische Chemie, Universität Regensburg, Regensburg, Germany
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Luo Q, Eibauer S, Reiser O. Novel bis(oxazole) pincer ligands for catalysis: Application in Suzuki-Miyaura cross coupling reactions under aerobic conditions. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.12.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fraile JM, García JI, Mayoral JA, Roldán M. Simple and Efficient Heterogeneous Copper Catalysts for Enantioselective C−H Carbene Insertion. Org Lett 2007; 9:731-3. [PMID: 17256952 DOI: 10.1021/ol070092y] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Immobilized box-Cu complexes are able to efficiently catalyze the insertion of a carbene, from methyl phenyldiazoacetate, into C-H bonds of THF, with high enantioselectivity (up to 88% ee). The immobilization not only allows recovery and reuse of the enantioselective catalyst but also provides an improvement in the selectivities from the values obtained in solution, probably due to a confinement effect of the bidimensional support. [reaction: see text].
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Affiliation(s)
- José M Fraile
- Departamento de Química OrgAnica, Instituto de Ciencia de Materiales de Aragón and Instituto Universitario de CatAlisis Homogénea, Universidad de Zaragoza-C.S.I.C., E-50009 Zaragoza, Spain.
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Rasappan R, Hager M, Gissibl A, Reiser O. Highly Enantioselective Michael Additions of Indole to Benzylidene Malonate Using Simple Bis(oxazoline) Ligands: Importance of Metal/Ligand Ratio. Org Lett 2006; 8:6099-102. [PMID: 17165939 DOI: 10.1021/ol062697k] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Structure: see text] Simple bis(oxazoline) ligands, especially azabis(oxazolines), can catalyze the copper-catalyzed addition of indoles to benzylidene malonates in up to >99% ee, provided that excess of chiral ligand is avoided. The paradigm followed in many asymmetric catalyses that an excess of chiral ligand with respect to the metal should improve enantioselectivity because a background reaction by free metal is suppressed, is not applicable here, which might call for revisiting some of the many copper(II)-bis(oxazoline)-catalyzed processes known.
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Affiliation(s)
- Ramesh Rasappan
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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Schätz A, Scarel A, Zangrando E, Mosca L, Carfagna C, Gissibl A, Milani B, Reiser O. High Stereocontrol and Efficiency in CO/Styrene Polyketone Synthesis Promoted by Azabis(oxazoline)−Palladium Complexes. Organometallics 2006. [DOI: 10.1021/om060424n] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Schätz
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Alessandro Scarel
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Ennio Zangrando
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Luca Mosca
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Carla Carfagna
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Anja Gissibl
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Barbara Milani
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany, Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy, and Istituto di Scienze Chimiche, Università di Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy
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Werner H, Herrerías C, Glos M, Gissibl A, Fraile J, Pérez I, Mayoral J, Reiser O. Synthesis of Polymer Bound Azabis(oxazoline) Ligands and their Application in Asymmetric Cyclopropanations. Adv Synth Catal 2006. [DOI: 10.1002/adsc.200505197] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Gissibl A, Finn MG, Reiser O. Cu(II)−Aza(bisoxazoline)-Catalyzed Asymmetric Benzoylations. Org Lett 2005; 7:2325-8. [PMID: 15932189 DOI: 10.1021/ol0505252] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Racemic 1,2-diols and alpha-hydroxy carbonyl compounds can be asymmetrically benzoylated in a kinetic resolution in the presence of various Cu(II)-aza(bisoxazoline) catalysts. A novel bisbenzyl-substituted aza(bisoxazoline) ligand proved to be especially effective when immobilized on MeOPEG(5000), giving from 91 to > or = 99% ee in 37-49% yield for each of five sequential reactions.
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Affiliation(s)
- Anja Gissibl
- Institut für Organische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany
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Bueno A, Moreno RM, Moyano A. 1-Amino-1-ferrocenyl-2-methyl-2-propanol: a case study on the conformational control of asymmetric induction. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.03.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Geiger C, Kreitmeier P, Reiser O. Cobalt(II)-Azabis(oxazoline)-Catalyzed Conjugate Reduction of ?,?-Unsaturated Carbonyl Compounds. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200404295] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Fraile JM, Garcı́a JI, Herrerı́as CI, Mayoral JA, Reiser O, Vaultier M. The importance of complex stability for asymmetric copper-catalyzed cyclopropanations in [emim][OTf] ionic liquid: the bis(oxazoline)–azabis(oxazoline) case. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.07.030] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Serra G, Scarone L, Sellanes D, Manta E, Wipf P. Use of Deoxo-Fluor for Double Cyclization to Bis-thiazolines. Limitations of This Agent for the Synthesis of Oxazolines. HETEROCYCLES 2004. [DOI: 10.3987/com-03-9996] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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