51
|
Yang C, Wang J, Liu Y, Ni X, Li X, Cheng J. Study on the Catalytic Behavior of Bifunctional Hydrogen‐Bonding Catalysts Guided by Free Energy Relationship Analysis of Steric Parameters. Chemistry 2017; 23:5488-5497. [DOI: 10.1002/chem.201605666] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Chen Yang
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China
| | - Yang Liu
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China
| | - Xiang Ni
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300071 P. R. China
| | - Jin‐Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300071 P. R. China
| |
Collapse
|
52
|
Tukhvatshin RS, Kucherenko AS, Nelyubina YV, Zlotin SG. Tertiary Amine-Derived Ionic Liquid-Supported Squaramide as a Recyclable Organocatalyst for Noncovalent “On Water” Catalysis. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00562] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rinat S. Tukhvatshin
- N.D. Zelinsky Institute
of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky
Prospect, 119991 Moscow, Russia
| | - Alexander S. Kucherenko
- N.D. Zelinsky Institute
of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky
Prospect, 119991 Moscow, Russia
| | - Yulia V. Nelyubina
- A.N. Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, 28, Vavilova
Street, 119991 Moscow, Russia
| | - Sergei G. Zlotin
- N.D. Zelinsky Institute
of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky
Prospect, 119991 Moscow, Russia
| |
Collapse
|
53
|
Ximenis M, Bustelo E, Algarra AG, Vega M, Rotger C, Basallote MG, Costa A. Kinetic Analysis and Mechanism of the Hydrolytic Degradation of Squaramides and Squaramic Acids. J Org Chem 2017; 82:2160-2170. [PMID: 28107005 DOI: 10.1021/acs.joc.6b02963] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The hydrolytic degradation of squaramides and squaramic acids, the product of partial hydrolysis of squaramides, has been evaluated by UV spectroscopy at 37 °C in the pH range 3-10. Under these conditions, the compounds are kinetically stable over long time periods (>100 days). At pH >10, the hydrolysis of the squaramate anions shows first-order dependence on both squaramate and OH-. At the same temperature and [OH-], the hydrolysis of squaramides usually displays biphasic spectral changes (A → B → C kinetic model) with formation of squaramates as detectable reaction intermediates. The measured rates for the first step (k1 ≈ 10-4 M-1 s-1) are 2-3 orders of magnitude faster than those for the second step (k2 ≈ 10-6 M-1 s-1). Experiments at different temperatures provide activation parameters with values of ΔH⧧ ≈ 9-18 kcal mol-1 and ΔS⧧ ≈ -5 to -30 cal K-1 mol-1. DFT calculations show that the mechanism for the alkaline hydrolysis of squaramic acids is quite similar to that of amides.
Collapse
Affiliation(s)
- Marta Ximenis
- Department of Chemistry, Universitat de les Illes Balears , Palma 07122, Spain
| | - Emilio Bustelo
- Department of Materials Scientist, Metallurgic Engineering and Inorganic Chemistry, Universidad de Cádiz , Puerto Real, 11510 Cádiz, Spain
| | - Andrés G Algarra
- Department of Materials Scientist, Metallurgic Engineering and Inorganic Chemistry, Universidad de Cádiz , Puerto Real, 11510 Cádiz, Spain
| | - Manel Vega
- Department of Chemistry, Universitat de les Illes Balears , Palma 07122, Spain
| | - Carmen Rotger
- Department of Chemistry, Universitat de les Illes Balears , Palma 07122, Spain
| | - Manuel G Basallote
- Department of Materials Scientist, Metallurgic Engineering and Inorganic Chemistry, Universidad de Cádiz , Puerto Real, 11510 Cádiz, Spain
| | - Antonio Costa
- Department of Chemistry, Universitat de les Illes Balears , Palma 07122, Spain
| |
Collapse
|
54
|
Trujillo C, Rozas I, Botte A, Connon SJ. A DFT mechanistic study of the organocatalytic asymmetric reaction of aldehydes and homophthalic anhydride. Chem Commun (Camb) 2017; 53:8874-8877. [DOI: 10.1039/c7cc04596d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first study of the cycloaddition of benzaldehyde with homophthalic anhydride under the influence of an alkaloid-based, squaramide substituted bifunctional organocatalyst using DFT methodology is reported.
Collapse
Affiliation(s)
- Cristina Trujillo
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Isabel Rozas
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Astrid Botte
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Stephen J. Connon
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| |
Collapse
|
55
|
Jiménez EI, Vallejo Narváez WE, Rocha-Rinza T, Hernández-Rodríguez M. Design and application of a bifunctional organocatalyst guided by electron density topological analyses. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00430c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Design of a catalyst via the identification of key interactions within the transition state with quantum chemical topology.
Collapse
Affiliation(s)
- Eddy I. Jiménez
- Institute of Chemistry
- National Autonomous University of Mexico
- Circuito Exterior
- Ciudad Universitaria
- Mexico City
| | - Wilmer E. Vallejo Narváez
- Institute of Chemistry
- National Autonomous University of Mexico
- Circuito Exterior
- Ciudad Universitaria
- Mexico City
| | - Tomás Rocha-Rinza
- Institute of Chemistry
- National Autonomous University of Mexico
- Circuito Exterior
- Ciudad Universitaria
- Mexico City
| | - Marcos Hernández-Rodríguez
- Institute of Chemistry
- National Autonomous University of Mexico
- Circuito Exterior
- Ciudad Universitaria
- Mexico City
| |
Collapse
|
56
|
Ričko S, Svete J, Štefane B, Perdih A, Golobič A, Meden A, Grošelj U. 1,3-Diamine-Derived Bifunctional Organocatalyst Prepared from Camphor. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sebastijan Ričko
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Andrej Perdih
- National Institute of Chemistry; Hajdrihova 19 SI-1000 Ljubljana Slovenia
| | - Amalija Golobič
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Anže Meden
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| |
Collapse
|
57
|
Berkes B, Ozsváth K, Molnár L, Gáti T, Holczbauer T, Kardos G, Soós T. Expedient and Diastereodivergent Assembly of Terpenoid Decalin Subunits having Quaternary Stereocenters through Organocatalytic Robinson Annulation of Nazarov Reagent. Chemistry 2016; 22:18101-18106. [DOI: 10.1002/chem.201604541] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Barbara Berkes
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Kristóf Ozsváth
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Laura Molnár
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry; Záhony Street 7 1031 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - György Kardos
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| |
Collapse
|
58
|
Metsala A, Žari S, Kanger T. Aza-Michael Reactions of Isatin Imines: Deeper Insight and Origin of the Stereoselectivity. ChemCatChem 2016. [DOI: 10.1002/cctc.201600584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andrus Metsala
- Department of Chemistry; Tallinn University of Technology; Akadeemia tee 15 12618 Tallinn Estonia
| | - Sergei Žari
- Department of Chemistry; Tallinn University of Technology; Akadeemia tee 15 12618 Tallinn Estonia
| | - Tõnis Kanger
- Department of Chemistry; Tallinn University of Technology; Akadeemia tee 15 12618 Tallinn Estonia
| |
Collapse
|
59
|
Jiménez EI, Vallejo Narváez WE, Román-Chavarría CA, Vazquez-Chavez J, Rocha-Rinza T, Hernández-Rodríguez M. Bifunctional Thioureas with α-Trifluoromethyl or Methyl Groups: Comparison of Catalytic Performance in Michael Additions. J Org Chem 2016; 81:7419-7431. [PMID: 27400400 DOI: 10.1021/acs.joc.6b01063] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Thioureas are an important scaffold in organocatalysis because of their ability to form hydrogen bonds that activate substrates and fix them in a defined position, which allows a given reaction to occur. Structures that enhance the acidity of the thiourea are usually used to increase the hydrogen-bonding properties, such as 3,5-bis(trifluoromethyl)phenyl and boronate ureas. Herein, we report the synthesis of bifunctional thioureas with a chiral moiety that include either a trifluoromethyl or methyl group. Their catalytic performance in representative Michael addition reactions was used in an effort to compare the electronic effects of the fluorination at the methyl group. The observed differences concerning yields and ee values cannot be attributed solely to the different steric environments; theoretical results indicate distinct interactions within the corresponding transition states. The calculated transition states show that the fluorinated catalysts have stronger N-H···O and C-H···F hydrogen bonds, while the nonfluorinated systems have C-H···π contacts. These results have shown that a variety of hydrogen-bonding interactions are important in determining the yield and selectivity of thiourea organocatalysis. These details can be further exploited in catalyst design.
Collapse
Affiliation(s)
- Eddy I Jiménez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Wilmer E Vallejo Narváez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Carlos A Román-Chavarría
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Josue Vazquez-Chavez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Tomás Rocha-Rinza
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Marcos Hernández-Rodríguez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| |
Collapse
|
60
|
Govender T, Arvidsson PI, Maguire GEM, Kruger HG, Naicker T. Enantioselective Organocatalyzed Transformations of β-Ketoesters. Chem Rev 2016; 116:9375-437. [PMID: 27463615 DOI: 10.1021/acs.chemrev.6b00156] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The β-ketoester structural motif continues to intrigue chemists with its electrophilic and nucleophilic sites. Proven to be a valuable tool within organic synthesis, natural product, and medicinal chemistry, reports on chiral β-ketoester molecular skeletons display a steady increase. With the reignition of organocatalysis in the past decade, asymmetric methods available for the synthesis of this structural unit has significantly expanded, making it one of the most exploited substrates for organocatalytic transformations. This review provides comprehensive information on the plethora of organocatalysts used in stereoselective organocatalyzed construction of β-ketoester-containing compounds.
Collapse
Affiliation(s)
- Thavendran Govender
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Per I Arvidsson
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa.,P. I. Arvidsson, Science for Life Laboratory, Drug Discovery and Development Platform and Division of Translational Medicine and Chemical Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet SE-171 77 Stockholm, Sweden
| | - Glenn E M Maguire
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Tricia Naicker
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| |
Collapse
|
61
|
Grayson MN, Houk KN. Cinchona Urea-Catalyzed Asymmetric Sulfa-Michael Reactions: The Brønsted Acid−Hydrogen Bonding Model. J Am Chem Soc 2016; 138:9041-4. [DOI: 10.1021/jacs.6b05074] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew N. Grayson
- Centre
for Molecular Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| |
Collapse
|
62
|
Madarász Á, Dósa Z, Varga S, Soós T, Csámpai A, Pápai I. Thiourea Derivatives as Brønsted Acid Organocatalysts. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00618] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ádám Madarász
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Zsolt Dósa
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Szilárd Varga
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Tibor Soós
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Antal Csámpai
- Institute
of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest-112, Hungary
| | - Imre Pápai
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| |
Collapse
|
63
|
Yang C, Zhang EG, Li X, Cheng JP. Asymmetric Conjugate Addition of Benzofuran-2-ones to Alkyl 2-Phthalimidoacrylates: Modeling Structure-Stereoselectivity Relationships with Steric and Electronic Parameters. Angew Chem Int Ed Engl 2016; 55:6506-10. [DOI: 10.1002/anie.201601028] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 02/29/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Chen Yang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - En-Ge Zhang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| |
Collapse
|
64
|
Yang C, Zhang EG, Li X, Cheng JP. Asymmetric Conjugate Addition of Benzofuran-2-ones to Alkyl 2-Phthalimidoacrylates: Modeling Structure-Stereoselectivity Relationships with Steric and Electronic Parameters. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chen Yang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - En-Ge Zhang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| |
Collapse
|
65
|
Kowalczyk R, Boratyński PJ. Stereoselective thia-Michael 1,4-Addition to Acyclic 2,4-Dienones and 2-En-4-ynones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501138] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
66
|
Lutete LM, Miyamoto T, Ikemoto T. Tertiary amino thiourea-catalyzed asymmetric cross aldol reaction of aryl methyl ketones with aryl trifluoromethyl ketones. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
67
|
Wolf FF, Klare H, Goldfuss B. Asymmetric Michael Additions of 4-Hydroxycoumarin to β-Nitrostyrenes with Chiral, Bifunctional Hydrogen-Bonding Catalysts. J Org Chem 2016; 81:1762-8. [DOI: 10.1021/acs.joc.5b02167] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florian F. Wolf
- Institut für Organische Chemie, Universität zu Köln, Greinstrasse 4, 50939 Köln, Germany
| | - Helge Klare
- Institut für Organische Chemie, Universität zu Köln, Greinstrasse 4, 50939 Köln, Germany
| | - Bernd Goldfuss
- Institut für Organische Chemie, Universität zu Köln, Greinstrasse 4, 50939 Köln, Germany
| |
Collapse
|
68
|
Echave H, López R, Palomo C. Bifunctional Brønsted Base Catalyzes Direct Asymmetric Aldol Reaction of α-Keto Amides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510482] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Haizea Echave
- Departamento de Química Orgánica I, Facultad de Químicas; Universidad del País Vasco; Apdo. 1072 20080 San Sebastián Spain
| | - Rosa López
- Departamento de Química Orgánica I, Facultad de Químicas; Universidad del País Vasco; Apdo. 1072 20080 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Químicas; Universidad del País Vasco; Apdo. 1072 20080 San Sebastián Spain
| |
Collapse
|
69
|
Echave H, López R, Palomo C. Bifunctional Brønsted Base Catalyzes Direct Asymmetric Aldol Reaction of α-Keto Amides. Angew Chem Int Ed Engl 2016; 55:3364-8. [DOI: 10.1002/anie.201510482] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/08/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Haizea Echave
- Departamento de Química Orgánica I, Facultad de Químicas; Universidad del País Vasco; Apdo. 1072 20080 San Sebastián Spain
| | - Rosa López
- Departamento de Química Orgánica I, Facultad de Químicas; Universidad del País Vasco; Apdo. 1072 20080 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Químicas; Universidad del País Vasco; Apdo. 1072 20080 San Sebastián Spain
| |
Collapse
|
70
|
Hack D, Dürr AB, Deckers K, Chauhan P, Seling N, Rübenach L, Mertens L, Raabe G, Schoenebeck F, Enders D. Asymmetric Synthesis of Spiropyrazolones by Sequential Organo- and Silver Catalysis. Angew Chem Int Ed Engl 2015; 55:1797-800. [PMID: 26676875 PMCID: PMC4725220 DOI: 10.1002/anie.201510602] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Indexed: 11/12/2022]
Abstract
A stereoselective one-pot synthesis of spiropyrazolones through an organocatalytic
asymmetric Michael addition and a formal Conia-ene reaction has been developed.
Depending on the nitroalkene, the 5-exo-dig-cyclization could be achieved by
silver-catalyzed alkyne activation or by oxidation of the intermediate enolate. The
mechanistic pathways have been investigated using computational chemistry and
mechanistic experiments.
Collapse
Affiliation(s)
- Daniel Hack
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Alexander B Dürr
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Kristina Deckers
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Nico Seling
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Lukas Rübenach
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Lucas Mertens
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Franziska Schoenebeck
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.
| |
Collapse
|
71
|
Hack D, Dürr AB, Deckers K, Chauhan P, Seling N, Rübenach L, Mertens L, Raabe G, Schoenebeck F, Enders D. Asymmetric Synthesis of Spiropyrazolones by Sequential Organo- and Silver Catalysis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201510602] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel Hack
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander B. Dürr
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Kristina Deckers
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Pankaj Chauhan
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Nico Seling
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Lukas Rübenach
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Lucas Mertens
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Franziska Schoenebeck
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Dieter Enders
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| |
Collapse
|
72
|
Martínez JI, Uria U, Muñiz M, Reyes E, Carrillo L, Vicario JL. Organocatalytic and enantioselective Michael reaction between α-nitroesters and nitroalkenes. Syn/anti-selectivity control using catalysts with the same absolute backbone chirality. Beilstein J Org Chem 2015; 11:2577-83. [PMID: 26734103 PMCID: PMC4685793 DOI: 10.3762/bjoc.11.277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/02/2015] [Indexed: 11/23/2022] Open
Abstract
The asymmetric and catalytic Michael reaction between α-nitroesters and nitroalkenes has been studied in the presence of two bifunctional catalysts both containing the same absolute chirality at the carbon backbone. The reaction performed in similar conditions allows us to control the syn or anti selectivity of the Michael adduct obtaining good yields and high enantiocontrol in all cases.
Collapse
Affiliation(s)
- Jose I Martínez
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Uxue Uria
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Maria Muñiz
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Efraím Reyes
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Luisa Carrillo
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Jose L Vicario
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| |
Collapse
|
73
|
Sun Q, Zhu H, Chen Y, Yang X, Sun X, Lin G. Squaramide‐Catalyzed Synthesis of Enantioenriched Spirocyclic Oxindoles via Ketimine Intermediates with Multiple Active Sites. Angew Chem Int Ed Engl 2015; 54:13253-7. [DOI: 10.1002/anie.201506206] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Qiang‐Sheng Sun
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Hua Zhu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Yong‐Jian Chen
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Xiao‐Di Yang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Xing‐Wen Sun
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Guo‐Qiang Lin
- Shanghai Institute of Organic Chemistry, CAS, 354 Fenglin Road, Shanghai, 200032 (China)
| |
Collapse
|
74
|
Breman AC, Telderman SEM, van Santen RPM, Scott JI, van Maarseveen JH, Ingemann S, Hiemstra H. Cinchona Alkaloid Catalyzed Sulfa-Michael Addition Reactions Leading to Enantiopure β-Functionalized Cysteines. J Org Chem 2015; 80:10561-74. [DOI: 10.1021/acs.joc.5b01660] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arjen C. Breman
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Suze E. M. Telderman
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Roy P. M. van Santen
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jamie I. Scott
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jan H. van Maarseveen
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Steen Ingemann
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Henk Hiemstra
- Van’t Hoff Institute
for Molecular Sciences, Faculty of Science, The University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| |
Collapse
|
75
|
Sun Q, Zhu H, Chen Y, Yang X, Sun X, Lin G. Squaramide‐Catalyzed Synthesis of Enantioenriched Spirocyclic Oxindoles via Ketimine Intermediates with Multiple Active Sites. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506206] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang‐Sheng Sun
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Hua Zhu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Yong‐Jian Chen
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Xiao‐Di Yang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Xing‐Wen Sun
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
| | - Guo‐Qiang Lin
- Shanghai Institute of Organic Chemistry, CAS, 354 Fenglin Road, Shanghai, 200032 (China)
| |
Collapse
|
76
|
Varga S, Jakab G, Csámpai A, Soós T. Iterative Coupling of Two Different Enones by Nitromethane Using Bifunctional Thiourea Organocatalysts. Stereocontrolled Assembly of Cyclic and Acyclic Structures. J Org Chem 2015; 80:8990-6. [DOI: 10.1021/acs.joc.5b01474] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Szilárd Varga
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, HAS, P.O. Box 286, Budapest, H-1519, Hungary
| | - Gergely Jakab
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, HAS, P.O. Box 286, Budapest, H-1519, Hungary
| | - Antal Csámpai
- Institute
of Chemistry, Department of Inorganic Chemistry, L. Eötvös University, Pázmány Péter sétány 1/A, Budapest H-1117, Hungary
| | - Tibor Soós
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, HAS, P.O. Box 286, Budapest, H-1519, Hungary
| |
Collapse
|
77
|
Enantioselective addition of aryl ketones and acetone to nitroalkenes organocatalyzed by carbamate-monoprotected cyclohexa-1,2-diamines. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.07.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
78
|
Experimental and Theoretical Studies in Hydrogen-Bonding Organocatalysis. Molecules 2015; 20:15500-24. [PMID: 26343615 PMCID: PMC6331831 DOI: 10.3390/molecules200915500] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 08/14/2015] [Accepted: 08/17/2015] [Indexed: 12/31/2022] Open
Abstract
Chiral thioureas and squaramides are among the most prominent hydrogen-bond bifunctional organocatalysts now extensively used for various transformations, including aldol, Michael, Mannich and Diels-Alder reactions. More importantly, the experimental and computational study of the mode of activation has begun to attract considerable attention. Various experimental, spectroscopic and calculation methods are now frequently used, often as an integrated approach, to establish the reaction mechanism, the mode of activation or explain the stereochemical outcome of the reaction. This article comprises several case studies, sorted according to the method used in their study. The aim of this review is to give the investigators an overview of the methods currently utilized for mechanistic investigations in hydrogen-bonding organocatalysis.
Collapse
|
79
|
Busschaert N, Caltagirone C, Van Rossom W, Gale PA. Applications of Supramolecular Anion Recognition. Chem Rev 2015; 115:8038-155. [PMID: 25996028 DOI: 10.1021/acs.chemrev.5b00099] [Citation(s) in RCA: 858] [Impact Index Per Article: 95.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Claudia Caltagirone
- ‡Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Wim Van Rossom
- †Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Philip A Gale
- †Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| |
Collapse
|
80
|
Kortelainen M, Suhonen A, Hamza A, Pápai I, Nauha E, Yliniemelä-Sipari S, Nissinen M, Pihko PM. Folding Patterns in a Family of Oligoamide Foldamers. Chemistry 2015; 21:9493-504. [PMID: 25965104 DOI: 10.1002/chem.201406521] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Indexed: 11/07/2022]
Abstract
A series of small, unsymmetrical pyridine-2,6-dicarboxylamide oligoamide foldamers with varying lengths and substituents at the end groups were synthetized to study their conformational properties and folding patterns. The @-type folding pattern resembled the oxyanion-hole motifs of enzymes, but several alternative folding patterns could also be characterized. Computational studies revealed several alternative conformers of nearly equal stability. These folding patterns differed from each other in their intramolecular hydrogen-bonding patterns and aryl-aryl interactions. In the solid state, the foldamers adopted either the globular @-type fold or the more extended S-type conformers, which were very similar to those foldamers obtained computationally. In some cases, the same foldamer molecule could even crystallize into two different folding patterns, thus confirming that the different folding patterns are very close in energy in spite of their completely different shapes. Finally, the best match for the observed NOE interactions in the liquid state was a conformation that matched the computationally characterized helix-type fold.
Collapse
Affiliation(s)
- Minna Kortelainen
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 JYU (Finland), Fax: (+358) 14-260-2501
| | - Aku Suhonen
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 JYU (Finland), Fax: (+358) 14-260-2501
| | - Andrea Hamza
- Institute of Organic Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudósok Körútja 2, 1117, Budapest (Hungary)
| | - Imre Pápai
- Institute of Organic Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudósok Körútja 2, 1117, Budapest (Hungary).
| | - Elisa Nauha
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 JYU (Finland), Fax: (+358) 14-260-2501
| | - Sanna Yliniemelä-Sipari
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 JYU (Finland), Fax: (+358) 14-260-2501
| | - Maija Nissinen
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 JYU (Finland), Fax: (+358) 14-260-2501.
| | - Petri M Pihko
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 JYU (Finland), Fax: (+358) 14-260-2501.
| |
Collapse
|
81
|
Etxabe J, Izquierdo J, Landa A, Oiarbide M, Palomo C. Catalytic Enantioselective Synthesis of N,Cα,Cα-Trisubstituted α-Amino Acid Derivatives Using 1H-Imidazol-4(5H)-ones as Key Templates. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501275] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
82
|
Etxabe J, Izquierdo J, Landa A, Oiarbide M, Palomo C. Catalytic Enantioselective Synthesis of N,C(α),C(α)-Trisubstituted α-Amino Acid Derivatives Using 1H-Imidazol-4(5H)-ones as Key Templates. Angew Chem Int Ed Engl 2015; 54:6883-6. [PMID: 25907987 DOI: 10.1002/anie.201501275] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/24/2015] [Indexed: 11/06/2022]
Abstract
1H-Imidazol-4(5H)-ones are introduced as novel nucleophilic α-amino acid equivalents in asymmetric synthesis. These compounds not only allow highly efficient construction of tetrasubstituted stereogenic centers, but unlike hitherto known templates, provide direct access to N-substituted (alkyl, allyl, aryl) α-amino acid derivatives.
Collapse
Affiliation(s)
- Julen Etxabe
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Joseba Izquierdo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Aitor Landa
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain).
| |
Collapse
|
83
|
Odagi M, Furukori K, Yamamoto Y, Sato M, Iida K, Yamanaka M, Nagasawa K. Origin of Stereocontrol in Guanidine-Bisurea Bifunctional Organocatalyst That Promotes α-Hydroxylation of Tetralone-Derived β-Ketoesters: Asymmetric Synthesis of β- and γ-Substituted Tetralone Derivatives via Organocatalytic Oxidative Kinetic Resolution. J Am Chem Soc 2015; 137:1909-15. [DOI: 10.1021/ja511149y] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Minami Odagi
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei
city, 184-8588, Tokyo Japan
| | - Kota Furukori
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei
city, 184-8588, Tokyo Japan
| | - Yoshiharu Yamamoto
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei
city, 184-8588, Tokyo Japan
| | - Makoto Sato
- Department
of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, 171-8501, Tokyo Japan
| | - Keisuke Iida
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei
city, 184-8588, Tokyo Japan
| | - Masahiro Yamanaka
- Department
of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, 171-8501, Tokyo Japan
| | - Kazuo Nagasawa
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei
city, 184-8588, Tokyo Japan
| |
Collapse
|
84
|
Lam YH, Houk KN. Origins of Stereoselectivity in Intramolecular Aldol Reactions Catalyzed by Cinchona Amines. J Am Chem Soc 2015; 137:2116-27. [DOI: 10.1021/ja513096x] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yu-hong Lam
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - K. N. Houk
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| |
Collapse
|
85
|
Varga E, Mika LT, Csámpai A, Holczbauer T, Kardos G, Soós T. Mechanistic investigations of a bifunctional squaramide organocatalyst in asymmetric Michael reaction and observation of stereoselective retro-Michael reaction. RSC Adv 2015. [DOI: 10.1039/c5ra19593d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The mechanism of cinchona–squaramide organocatalytic Michael addition was studied usingin situIR and NMR experiments. As a result, not only kinetic parameters were determined but a stereoselective retro-Michael reaction was also observed.
Collapse
Affiliation(s)
- Eszter Varga
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - László Tamás Mika
- Budapest University of Technology and Economics
- Faculty of Chemical Technology and Biotechnology
- Department of Chemical and Environmental Process Engineering
- Budapest
- Hungary
| | - Antal Csámpai
- Institute of Chemistry
- Eötvös Loránd University
- Budapest
- Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - György Kardos
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - Tibor Soós
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| |
Collapse
|
86
|
Fuentes de Arriba ÁL, Herrero ÁG, Rubio OH, Monleón LM, Simón Rubio L, Alcázar V, Sanz F, Morán JR. Chiral recognition with a benzofuran receptor that mimics an oxyanion hole. Org Biomol Chem 2015; 13:493-501. [DOI: 10.1039/c4ob01954g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral resolution of a novel tripodal oxyanion-hole receptor with application in amino acid derivatives enantioselective extraction.
Collapse
Affiliation(s)
| | | | - Omayra H. Rubio
- Organic Chemistry Department
- University of Salamanca
- 37008 Salamanca
- Spain
| | - Laura M. Monleón
- Organic Chemistry Department
- University of Salamanca
- 37008 Salamanca
- Spain
| | - Luis Simón Rubio
- Organic Chemistry Department
- University of Salamanca
- 37008 Salamanca
- Spain
| | - Victoria Alcázar
- Industrial Chemistry and Environmental Engineering Department
- Technical University of Madrid
- 28006 Madrid
- Spain
| | - Francisca Sanz
- X-Ray Diffraction Service
- University of Salamanca
- 37008 Salamanca
- Spain
| | - Joaquín R. Morán
- Organic Chemistry Department
- University of Salamanca
- 37008 Salamanca
- Spain
| |
Collapse
|
87
|
Li JH, Du DM. Enantioselective synthesis of chiral heterocycles containing both chroman and pyrazolone derivatives catalysed by a chiral squaramide. Org Biomol Chem 2015; 13:5636-45. [DOI: 10.1039/c4ob02653e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient chiral squaramide-catalysed enantioselective Michael addition of pyrazolin-5-ones to 3-nitro-2H-chromenes afforded chiral heterocycles containing both chroman and pyrazolone derivatives in high to excellent yields (up to 98%) with high enantioselectivities (up to 96%) under very low catalyst loading (0.2 mol%).
Collapse
Affiliation(s)
- Jun-Hua Li
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing 100081
- People's Republic of China
| | - Da-Ming Du
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing 100081
- People's Republic of China
| |
Collapse
|
88
|
Jindal G, Kisan HK, Sunoj RB. Mechanistic Insights on Cooperative Catalysis through Computational Quantum Chemical Methods. ACS Catal 2014. [DOI: 10.1021/cs501688y] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Garima Jindal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Hemanta K. Kisan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raghavan B. Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| |
Collapse
|
89
|
Badiola E, Fiser B, Gómez-Bengoa E, Mielgo A, Olaizola I, Urruzuno I, García JM, Odriozola JM, Razkin J, Oiarbide M, Palomo C. Enantioselective Construction of Tetrasubstituted Stereogenic Carbons through Brønsted Base Catalyzed Michael Reactions: α′-Hydroxy Enones as Key Enoate Equivalent. J Am Chem Soc 2014; 136:17869-81. [DOI: 10.1021/ja510603w] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Eider Badiola
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Béla Fiser
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Enrique Gómez-Bengoa
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Antonia Mielgo
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Iurre Olaizola
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Iñaki Urruzuno
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Jesús M. García
- Departamento
de Química Aplicada, Institute of Advanced Materials (INAMAT), Universidad Pública de Navarra, 31006-Pamplona, Spain
| | - José M. Odriozola
- Departamento
de Química Aplicada, Institute of Advanced Materials (INAMAT), Universidad Pública de Navarra, 31006-Pamplona, Spain
| | - Jesús Razkin
- Departamento
de Química Aplicada, Institute of Advanced Materials (INAMAT), Universidad Pública de Navarra, 31006-Pamplona, Spain
| | - Mikel Oiarbide
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Claudio Palomo
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| |
Collapse
|
90
|
Quintard A, Cheshmedzhieva D, Sanchez Duque MDM, Gaudel-Siri A, Naubron JV, Génisson Y, Plaquevent JC, Bugaut X, Rodriguez J, Constantieux T. Origin of the enantioselectivity in organocatalytic Michael additions of β-ketoamides to α,β-unsaturated carbonyls: a combined experimental, spectroscopic and theoretical study. Chemistry 2014; 21:778-90. [PMID: 25382666 DOI: 10.1002/chem.201404481] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 09/18/2014] [Indexed: 12/27/2022]
Abstract
The organocatalytic enantioselective conjugate addition of secondary β-ketoamides to α,β-unsaturated carbonyl compounds is reported. Use of bifunctional Takemoto's thiourea catalyst allows enantiocontrol of the reaction leading either to simple Michael adducts or spirocyclic aminals in up to 99 % ee. The origin of the enantioselectivity has been rationalised based on combined DFT calculations and kinetic analysis. This study provides a deeper understanding of the reaction mechanism, which involves a predominant role of the secondary amide proton, and clarifies the complex interactions occurring between substrates and the catalyst.
Collapse
Affiliation(s)
- Adrien Quintard
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille (France). Fax: (+33) 491-289-187
| | | | | | | | | | | | | | | | | | | |
Collapse
|
91
|
Martínez JI, Villar L, Uria U, Carrillo L, Reyes E, Vicario JL. Bifunctional Squaramide Catalysts with the Same Absolute Chirality for the Diastereodivergent Access to Densely Functionalised Cyclohexanes through Enantioselective Domino Reactions. Synthesis and Mechanistic Studies. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400502] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
92
|
Chiral bifunctional squaramide catalyzed asymmetric Michael addition of ethyl α-nitroacetate to β,γ-unsaturated α-ketoesters. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
93
|
Li JH, Du DM. Organocatalyzed Cascade Aza-Michael/Michael Addition for the Asymmetric Construction of Highly Functionalized Spiropyrazolone Tetrahydroquinolines. Chem Asian J 2014; 9:3278-86. [DOI: 10.1002/asia.201402706] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Indexed: 01/09/2023]
|
94
|
Loh CCJ, Chauhan P, Hack D, Lehmann C, Enders D. Rapid Asymmetric Synthesis of Highly Functionalized Indanolsviaa Michael/Henry Organocascade with Submol% Squaramide Catalyst Loadings. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400499] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|