1
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Álvarez-Bermúdez O, Landfester K, Zhang KAI, Muñoz-Espí R. Proline-Functionalized Magnetic Nanoparticles as Highly Performing Asymmetric Catalysts. Macromol Rapid Commun 2024:e2400615. [PMID: 39259266 DOI: 10.1002/marc.202400615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2024] [Revised: 08/28/2024] [Indexed: 09/12/2024]
Abstract
Amino acids have a crucial role in the field of asymmetric organocatalysis for the production of chiral compounds with high added value and specific biological activity. In particular, proline offers high activity and stereoselectivity for catalyzing aldol reactions in organic solvents. However, proline-based catalysts often lack water-solubility, accessibility, catalytic performance, or recovery in aqueous media. This work reports the design of proline-functionalized poly(methyl methacrylate) (PMMA) nanoparticles with a magnetic core that offer high availability of chiral units in water and high recyclability. A proline-based copolymerizable surfactant is designed and integrated onto the surface of PMMA nanoparticles through a miniemulsion polymerization process without using additional surfactants. The miniemulsion technique allows the incorporation of magnetite to the system to create a magnetically separable catalyst. The chiral nanocatalyst presents a high diastereoselective catalytic activity for the intermolecular aldol reaction between p-nitrobenzaldehyde and cyclohexanone in water.
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Affiliation(s)
- Olaia Álvarez-Bermúdez
- Institute of Materials Science (ICMUV), University of Valencia, c/ Catedràtic José Beltrán 2, Paterna, 46980, Spain
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Kai A I Zhang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Rafael Muñoz-Espí
- Institute of Materials Science (ICMUV), University of Valencia, c/ Catedràtic José Beltrán 2, Paterna, 46980, Spain
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2
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Das N, Maity C. Switchable aqueous catalytic systems for organic transformations. Commun Chem 2022; 5:115. [PMID: 36697818 PMCID: PMC9814960 DOI: 10.1038/s42004-022-00734-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/12/2022] [Indexed: 01/28/2023] Open
Abstract
In living organisms, enzyme catalysis takes place in aqueous media with extraordinary spatiotemporal control and precision. The mechanistic knowledge of enzyme catalysis and related approaches of creating a suitable microenvironment for efficient chemical transformations have been an important source of inspiration for the design of biomimetic artificial catalysts. However, in "nature-like" environments, it has proven difficult for artificial catalysts to promote effective chemical transformations. Besides, control over reaction rate and selectivity are important for smart application purposes. These can be achieved via incorporation of stimuli-responsive features into the structure of smart catalytic systems. Here, we summarize such catalytic systems whose activity can be switched 'on' or 'off' by the application of stimuli in aqueous environments. We describe the switchable catalytic systems capable of performing organic transformations with classification in accordance to the stimulating agent. Switchable catalytic activity in aqueous environments provides new possibilities for the development of smart materials for biomedicine and chemical biology. Moreover, engineering of aqueous catalytic systems can be expected to grow in the coming years with a further broadening of its application to diverse fields.
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Affiliation(s)
- Nikita Das
- Department of Chemistry, School of Advanced Sciences (SAS), Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India
| | - Chandan Maity
- Department of Chemistry, School of Advanced Sciences (SAS), Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India.
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3
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Shajahan R, Sarang R, Saithalavi A. Polymer Supported Proline-Based Organocatalysts in Asymmetric Aldol Reactions: A Review. CURRENT ORGANOCATALYSIS 2022. [DOI: 10.2174/2213337209666220112094231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The use of proline-based organocatalysts has acquired significant importance in organic synthesis, especially in enantioselective synthesis. Proline and its derivatives are proven to be quite effective chiral organocatalysts for a variety of transformations including the aldol reaction, which is considered as one of the important C-C bond forming reactions in organic synthesis. The use of chiral organocatalysts has several advantages over its metal-mediated analogues. Subsequently, a large number of highly efficient proline-based organocatalysts including polymer-supported chiral analogues have been identified for aldol reaction. The use of polymer-supported organocatalysts exhibited remarkable stability under the reaction conditions and offered the best results particularly in terms of its recyclability and reusability. These potential benefits along with its economic and green chemistry advantages have led to the search for many polymer-supported proline catalysts. In this review, recent developments in exploring various polymer immobilized proline-based chiral organocatalysts for asymmetric aldol reactions are described.
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Affiliation(s)
- Rubina Shajahan
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India-686560
| | - Rithwik Sarang
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Kottayam, Kerala, India-686560
| | - Anas Saithalavi
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India-686560
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Kottayam, Kerala, India-686560
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4
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Delgado JAC, Vicente FEM, de la Torre AF, Fernandes VA, Corrêa AG, Paixão MW. Synthesis of N-alkylated lipopeptides and their application as organocatalysts in asymmetric Michael addition in aqueous environments. NEW J CHEM 2021. [DOI: 10.1039/d1nj01112j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A library of N-alkylated lipopeptide organocatalysts were synthesized through an isocyanide-based multicomponent reaction.
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Affiliation(s)
- José A. C. Delgado
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
| | - Fidel E. M. Vicente
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
| | - Alexander F. de la Torre
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Concepción
- Concepción
- Chile
| | - Vitor A. Fernandes
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
| | - Arlene G. Corrêa
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
| | - Márcio W. Paixão
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
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5
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Tang Y, Wang Q, Wu L, Liu K, Wang W, Shen Y, Xue Y, Dai S. L-proline functionalized pH-responsive copolymers as supported organocatalysts for asymmetric aldol reaction in water. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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6
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Vargas EL, Velázquez JA, Rodrigo E, Reinecke H, Rodríguez-Hernández J, Fernández-Mayoralas A, Gallardo A, Cid MB. p Ka Modulation of Pyrrolidine-Based Catalytic Polymers Used for the Preparation of Glycosyl Hydrazides at Physiological pH and Temperature. ACS APPLIED BIO MATERIALS 2020; 3:1955-1967. [PMID: 35025318 DOI: 10.1021/acsabm.9b01123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Inspired by the ability of enzymes to use the surrounding hydrophobic and/or polarizable groups to modulate the pKa of a given amino acid, we designed a series of soluble polymers able to decrease the basicity of pyrrolidine (from 11.2 to 8.6 pKa units), which clearly increases its aminocatalytic activity at physiological pH in C═N bond formation reactions via ion iminium activation. Other parameters such as charge density, hydrophobic/hydrophilic balance, and aggregation state have been studied as important factors in the catalytic activity of the polymers for a given substrate. To demonstrate the utility of our approach, an optimal pyrrolidine-based catalytic polymer has been used for the formation of C-N bonds between hydrazides and free sugars as the model system for the preparation of glycoconjugates.
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Affiliation(s)
- Emily L Vargas
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| | - J Antonio Velázquez
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| | - Eduardo Rodrigo
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| | - Helmut Reinecke
- Instituto de Ciencia y Tecnologı́a de Polı́meros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Juan Rodríguez-Hernández
- Instituto de Ciencia y Tecnologı́a de Polı́meros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | | | - Alberto Gallardo
- Instituto de Ciencia y Tecnologı́a de Polı́meros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - María Belén Cid
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
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7
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Li X, Lv C, Jia X, Cheng M, Wang K, Hu Z. Nanoparticle Based on Poly(Ionic Liquid) as an Efficient Solid Immobilization Catalyst for Aldol Reaction and Multicomponent Reaction in Water. ACS APPLIED MATERIALS & INTERFACES 2017; 9:827-835. [PMID: 27966886 DOI: 10.1021/acsami.6b12334] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An environmentally friendly nanoparticle-supported catalyst was successfully prepared via in situ ionic complexation between imidazolium-based polymer ionic liquid (PIL) and poly(l-prolinamide-co-MAA). The physical and chemical properties of the obtained nanoparticles were characterized by TEM, FTIR, XPS, and static water contact angle experiments. The surface properties of the nanoparticle were found to significantly affect the catalytic performance. The nanoparticle with PIL outer facilitated the adsorption of reaction substrate in it. As a result, the catalytic system catalyzed the asymmetric Aldol reaction and multicomponent reaction in pure water efficiently. The catalytic system was able to be reused and recycled five times, and with no discernible loss in catalytic activity and enantioselectivity. These findings suggest that nanoparticles based on PIL may provide a new approach for preparing high performance supported catalysts for organic reactions in water. This technology also addresses issues associated with mass transfer in pure water reactions.
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Affiliation(s)
- Xinjuan Li
- Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, 453007, P. R. China
| | - Chunna Lv
- Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, 453007, P. R. China
| | - Xianbin Jia
- Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, 453007, P. R. China
| | - Maoqin Cheng
- Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, 453007, P. R. China
| | - Kai Wang
- Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, 453007, P. R. China
| | - Zhiguo Hu
- Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, 453007, P. R. China
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8
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Sánchez D, Carneros H, Castro-Alvarez A, Llàcer E, Planas F, Vilarrasa J. Further insights into the organocatalytic reaction of 2,2-dimethyl-1,3-dioxan-5-one with α-silyloxy aldehydes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Arivalagan PR, Zhao Y. Interfacial catalysis of aldol reactions by prolinamide surfactants in reverse micelles. Org Biomol Chem 2015; 13:770-5. [DOI: 10.1039/c4ob02074j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aggregation of prolinamide surfactants in nonpolar solvents enhanced their catalytic activity and gave unusual substrate selectivity in aldol condensations.
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Affiliation(s)
| | - Yan Zhao
- Department of Chemistry
- Iowa State University
- Ames
- USA
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10
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Wang H, Li N, Yan Z, Zhang J, Wan X. Synthesis and properties of novel helical 3-vinylpyridine polymers containing proline moieties for asymmetric aldol reaction. RSC Adv 2015. [DOI: 10.1039/c5ra07207g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel helical vinyl polymers bearing l/d-proline amide moieties were prepared to catalyze asymmetric aldol reactions, which afforded faster reaction rate but slightly poorer enantio-selectivity than the low molar mass counterparts.
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Affiliation(s)
- Heng Wang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of MOE
- Center for Soft Matter Science and Engineering
- College of Chemistry and Molecular Engineering
- Peking University
| | - Na Li
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of MOE
- Center for Soft Matter Science and Engineering
- College of Chemistry and Molecular Engineering
- Peking University
| | - Zijia Yan
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of MOE
- Center for Soft Matter Science and Engineering
- College of Chemistry and Molecular Engineering
- Peking University
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of MOE
- Center for Soft Matter Science and Engineering
- College of Chemistry and Molecular Engineering
- Peking University
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of MOE
- Center for Soft Matter Science and Engineering
- College of Chemistry and Molecular Engineering
- Peking University
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11
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Wang S, Liu P, Wang WJ, Zhang Z, Li BG. Hyperbranched polyethylene-supported l-proline: a highly selective and recyclable organocatalyst for asymmetric aldol reactions. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00250h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A recyclable l-proline-based organocatalyst system with unique hyperbranched polyethylene as a scaffold is prepared for highly stereoselective asymmetric aldol reactions.
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Affiliation(s)
- Song Wang
- State Key Lab of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Pingwei Liu
- State Key Lab of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Wen-Jun Wang
- State Key Lab of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Zhiguo Zhang
- Key Lab of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Bo-Geng Li
- State Key Lab of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
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12
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Neumann LN, Baker MB, Leenders CMA, Voets IK, Lafleur RPM, Palmans ARA, Meijer EW. Supramolecular polymers for organocatalysis in water. Org Biomol Chem 2015; 13:7711-9. [DOI: 10.1039/c5ob00937e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An l-proline-functionalised benzene-1,3,5-tricarboxamide derivative self-assembles in water into well-defined, one-dimensional, helical, supramolecular polymers that efficiently catalyse aldol reactions.
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Affiliation(s)
- Laura N. Neumann
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Matthew B. Baker
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Christianus M. A. Leenders
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Ilja K. Voets
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - René P. M. Lafleur
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Anja R. A. Palmans
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - E. W. Meijer
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
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13
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Berdugo C, Escuder B, Miravet JF. Structural insight into the aggregation of L-prolyl dipeptides and its effect on organocatalytic performance. Org Biomol Chem 2014; 13:592-600. [PMID: 25382228 DOI: 10.1039/c4ob02003k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NMR and organocatalytic studies of four dipeptides derived from L-proline are described. Results indicate that important conformational changes around the catalytic L-proline moiety are observed for free dipeptides upon changing the adjacent amino acid. Also, an aggregation process is detected as the concentration increases. The self-association of the dipeptides has been fitted to a cooperative binding model. All the compounds have been assayed as catalysts for the conjugated addition of cyclohexanone to trans-β-nitrostyrene in toluene. In agreement with the structural studies, noticeable changes in the catalytic performance are detected upon changing the catalyst concentration, as the catalyst is activated by self-aggregation.
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Affiliation(s)
- Cristina Berdugo
- Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Avda. SosBaynat s/n, Castelló, 12071, Spain.
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14
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Mihali V, Foschi F, Penso M, Pozzi G. Chemoselective Synthesis ofN-Protected Alkoxyprolines under Specific Solvation Conditions. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402429] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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15
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Huerta E, van Genabeek B, Stals PJM, Meijer EW, Palmans ARA. A Modular Approach to Introduce Function into Single-Chain Polymeric Nanoparticles. Macromol Rapid Commun 2014; 35:1320-5. [DOI: 10.1002/marc.201400213] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 05/14/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Elisa Huerta
- Laboratory of Macromolecular and Organic Chemistry; Institute for Complex Molecular Systems; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Bas van Genabeek
- Laboratory of Macromolecular and Organic Chemistry; Institute for Complex Molecular Systems; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Patrick J. M. Stals
- Laboratory of Macromolecular and Organic Chemistry; Institute for Complex Molecular Systems; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - E. W. Meijer
- Laboratory of Macromolecular and Organic Chemistry; Institute for Complex Molecular Systems; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Anja R. A. Palmans
- Laboratory of Macromolecular and Organic Chemistry; Institute for Complex Molecular Systems; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
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16
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Henseler AH, Ayats C, Pericàs MA. An Enantioselective Recyclable Polystyrene-Supported Threonine-Derived Organocatalyst for Aldol Reactions. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400033] [Citation(s) in RCA: 28] [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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17
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Liu Y, Tong Q, Ge L, Zhang Y, Hua L, Fan Y. A novel poly(N-isopropyl-acrylamine-co-l-proline) catalyst for aldol reaction: synthesis, catalytic performance and recyclability. RSC Adv 2014. [DOI: 10.1039/c4ra05951d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel homogeneous copolymer catalyst, poly(N-isopropyl-acrylamine-co-l-proline), possesses excellent activity and stereoselectivities. Even after ten cycles, the catalytic activity and stereoselectivities remained almost unchanged. The circular dichroism spectra of the copolymer catalyst are apparently different from the corresponding monomer.
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Affiliation(s)
- Yubing Liu
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093, China
- Nanjing University-Yangzhou Institute of Chemistry and Chemical Engineering
| | - Qing Tong
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093, China
- Nanjing University-Yangzhou Institute of Chemistry and Chemical Engineering
| | - Liya Ge
- Residues and Resource Reclamation Centre
- Nanyang Environment and Water Research Institute
- Nanyang Technological University
- Singapore 637141, Singapore
- Natural Sciences and Science Education Academic Group
| | - Yu Zhang
- Nanjing University-Yangzhou Institute of Chemistry and Chemical Engineering
- Yizheng 211400, China
| | - Lin Hua
- Nanjing University-Yangzhou Institute of Chemistry and Chemical Engineering
- Yizheng 211400, China
- Linovus Technology Pte Ltd
- Singapore 159637, Singapore
| | - Yining Fan
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093, China
- Nanjing University-Yangzhou Institute of Chemistry and Chemical Engineering
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18
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Uemukai T, Ishifune M. Synthesis and catalytic activity of the thermoresponsive polymers having pyrrolidine side chains as base functionalities. J Appl Polym Sci 2013. [DOI: 10.1002/app.38971] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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19
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Huerta E, Stals PJM, Meijer EW, Palmans ARA. Consequences of Folding a Water-Soluble Polymer Around an Organocatalyst. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207123] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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20
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Huerta E, Stals PJM, Meijer EW, Palmans ARA. Consequences of Folding a Water-Soluble Polymer Around an Organocatalyst. Angew Chem Int Ed Engl 2012; 52:2906-10. [DOI: 10.1002/anie.201207123] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/10/2012] [Indexed: 11/06/2022]
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21
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Doyagüez EG, Rodríguez-Hernández J, Corrales G, Fernández-Mayoralas A, Gallardo A. Water-Soluble Pendant Copolymers Bearing Proline and Permethylated β-Cyclodextrin: pH-Dependent Catalytic Nanoreactors. Macromolecules 2012. [DOI: 10.1021/ma301615a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Elisa G. Doyagüez
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
| | | | - Guillermo Corrales
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
| | | | - Alberto Gallardo
- Instituto de Ciencia y Tecnología
de Polímeros, CSIC, Juan de la Cierva
3, 28006, Madrid, Spain
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22
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Proline–cyclodextrin conjugates: synthesis and evaluation as catalysts for aldol reaction in water. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.06.089] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhao Q, Lam YH, Kheirabadi M, Xu C, Houk KN, Schafmeister CE. Hydrophobic substituent effects on proline catalysis of aldol reactions in water. J Org Chem 2012; 77:4784-92. [PMID: 22500641 PMCID: PMC3589585 DOI: 10.1021/jo300569c] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Derivatives of 4-hydroxyproline with a series of hydrophobic groups in well-defined orientations have been tested as catalysts for the aldol reactions. All of the modified proline catalysts carry out the intermolecular aldol reaction in water and provide high diastereoselectivity and enantioselectivity. Modified prolines with aromatic groups syn to the carboxylic acid are better catalysts than those with small hydrophobic groups (1a is 43.5 times faster than 1f). Quantum mechanical calculations provide transition structures, TS-1a(water) and TS-1f(water), that support the hypothesis that a stabilizing hydrophobic interaction occurs with 1a.
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Affiliation(s)
- Qingquan Zhao
- Department of Chemistry, Temple University, 1901 N. 13 Street, Philadelphia, PA 19122
| | - Yu-hong Lam
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
| | - Mahboubeh Kheirabadi
- Department of Chemistry, Temple University, 1901 N. 13 Street, Philadelphia, PA 19122
| | - Chongsong Xu
- Department of Chemistry, Temple University, 1901 N. 13 Street, Philadelphia, PA 19122
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
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Stals PJM, Phan TNT, Gigmes D, Paffen TFE, Meijer EW, Palmans ARA. Nitroxide-mediated controlled radical polymerizations of styrene derivatives. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.25833] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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