1
|
Zhou Z, Kasten K, Kang T, Cordes DB, Smith AD. Enantioselective Synthesis in Continuous Flow: Polymer-Supported Isothiourea-Catalyzed Enantioselective Michael Addition-Cyclization with α-Azol-2-ylacetophenones. Org Process Res Dev 2024; 28:2041-2049. [PMID: 38783855 PMCID: PMC11110067 DOI: 10.1021/acs.oprd.4c00113] [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: 03/16/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024]
Abstract
A packed reactor bed incorporating a polymer-supported isothiourea HyperBTM catalyst derivative has been used to promote the enantioselective synthesis of a range of heterocyclic products derived from α-azol-2-ylacetophenones and -acetamides combined with alkyl, aryl, and heterocyclic α,β-unsaturated homoanhydrides in continuous flow via an α,β-unsaturated acyl-ammonium intermediate. The products are generated in good to excellent yields and generally in excellent enantiopurity (up to 97:3 er). Scale-up is demonstrated on a 15 mmol scale, giving the heterocyclic product in 68% overall yield with 98:2 er after recrystallization.
Collapse
Affiliation(s)
- Zhanyu Zhou
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K.
| | - Kevin Kasten
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K.
| | - Tengfei Kang
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K.
| | - David B. Cordes
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K.
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K.
| |
Collapse
|
2
|
Direct Asymmetric Aldol Reaction in Continuous Flow Using Gel‐Bound Organocatalysts. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
3
|
Schmiegel CJ, Berg P, Obst F, Schoch R, Appelhans D, Kuckling D. Continuous Flow Synthesis of Azoxybenzenes by Reductive Dimerization of Nitrosobenzenes with Gel‐Bound Catalysts. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Carsten J. Schmiegel
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Patrik Berg
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Franziska Obst
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - Roland Schoch
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Dietmar Appelhans
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - Dirk Kuckling
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| |
Collapse
|
4
|
Chevis PJ, Pyne SG. Synthesis of enantioenriched α-heteroatom functionalised aldehydes by chiral organocatalysis and their synthetic applications. Org Chem Front 2021. [DOI: 10.1039/d1qo00101a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Asymmetric organocatalysis is a versatile method for the enantioselective α-functionalisation of aldehydes. The synthetic scope for chiral α-heteroatom substituted aldehydes is examined including their applications in synthesis.
Collapse
Affiliation(s)
- Philip J. Chevis
- School of Chemistry and Molecular Bioscience
- University of Wollongong
- Wollongong
- Australia
| | - Stephen G. Pyne
- School of Chemistry and Molecular Bioscience
- University of Wollongong
- Wollongong
- Australia
| |
Collapse
|
5
|
Okuno Y, Shibata T, Ohyou A, Suzuki R, Takegami M, Kato S, Isomura S, Aoki S, Kanno J, Sato Y. Synthesis of Bi‐functional Immobilized Polymer Catalysts via a Two‐step Radiation‐induced Graft Polymerization Process. ChemCatChem 2020. [DOI: 10.1002/cctc.202001451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yoshinori Okuno
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Takako Shibata
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Akie Ohyou
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Rie Suzuki
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Mayuko Takegami
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Satoshi Kato
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Shigeki Isomura
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Shoji Aoki
- ECE Co. Ltd. Technical Development Group 4-2-1 Honfujisawa Fujisawa 251-8502 Japan
| | - Junichi Kanno
- ECE Co. Ltd. Technical Development Group 4-2-1 Honfujisawa Fujisawa 251-8502 Japan
| | - Yasuo Sato
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| |
Collapse
|
6
|
Berg P, Obst F, Simon D, Richter A, Appelhans D, Kuckling D. Novel Application of Polymer Networks Carrying Tertiary Amines as a Catalyst Inside Microflow Reactors Used for
Knoevenagel
Reactions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Patrik Berg
- Department of Chemistry Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Franziska Obst
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - David Simon
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - Andreas Richter
- Institute of Semiconductors and Microsystems Technische Universität Dresden Helmholtzstr. 10 01062 Dresden Germany
| | - Dietmar Appelhans
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - Dirk Kuckling
- Department of Chemistry Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| |
Collapse
|
7
|
Yoo WJ, Ishitani H, Saito Y, Laroche B, Kobayashi S. Reworking Organic Synthesis for the Modern Age: Synthetic Strategies Based on Continuous-Flow Addition and Condensation Reactions with Heterogeneous Catalysts. J Org Chem 2020; 85:5132-5145. [PMID: 32069417 DOI: 10.1021/acs.joc.9b03416] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
While organic synthesis carried out in most laboratories uses batch methods, there is growing interest in modernizing fine chemical synthesis through continuous-flow processes. As a synthetic method, flow processes have several advantages over batch systems in terms of environmental compatibility, efficiency, and safety, and recent advances have allowed for the synthesis of several complex molecules, including active pharmaceutical ingredients (APIs). Nevertheless, due to several reasons related to the difficulties arising from byproduct formation during the flow process, such as lower yields, poor selectivities, clogging of columns due to poor solubility, catalyst poisoning, etc., successful examples of continuous-flow synthesis of complex organic molecules are still limited. In order to solve this bottleneck, the development of selective and atom-economical continuous-flow organic transformations are needed. This perspective highlights examples of atom-economical addition and condensation reactions with heterogeneous catalysts under continuous-flow conditions and their applications for the synthesis of complex organic molecules such as natural products and APIs. In order to realize new continuous-flow methodologies, based on addition and condensation reactions, in place of substitution reactions, the development of novel reactions and heterogeneous catalysts is required.
Collapse
Affiliation(s)
- Woo-Jin Yoo
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Haruro Ishitani
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuki Saito
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Benjamin Laroche
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.,Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
8
|
Rodríguez‐Escrich C, Pericàs MA. Catalytic Enantioselective Flow Processes with Solid‐Supported Chiral Catalysts. CHEM REC 2018; 19:1872-1890. [DOI: 10.1002/tcr.201800097] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/02/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Carles Rodríguez‐Escrich
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology (BIST) Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology (BIST) Avinguda Països Catalans 16 43007 Tarragona Spain
- Departament de Química OrgànicaUniversitat de Barcelona 08080 Barcelona Spain
| |
Collapse
|
9
|
|
10
|
Jain VK, Ramapanicker R. Diastereoselective synthesis of D-threo-sphinganine, L-erythro-sphinganine and (−)-spisulosine through asymmetric α-hydroxylation of a higher homologue of Garner's aldehyde. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
11
|
Philip AT, Raju E, Ramapanicker R. Stereoselective Synthesis of Hydroxy Diamino Acid Derivatives and the Caprolactam Unit of Bengamide A through Organocatalytic α-Hydroxylation and Reductive Amination of Aldehydes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Anijamol T. Philip
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Eerlapally Raju
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Ramesh Ramapanicker
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| |
Collapse
|
12
|
Chacko S, Ramapanicker R. Synthesis of 1-Deoxy-8,8a-di-epi-castanospermine, 1-Deoxy-6,7,8a-tri-epi-castanospermine and Formal Synthesis of Pumilotoxin 251D. ChemistrySelect 2016. [DOI: 10.1002/slct.201600891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shibin Chacko
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur, Uttar Pradesh India 208016
| | - Ramesh Ramapanicker
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur, Uttar Pradesh India 208016
| |
Collapse
|
13
|
Etayo P, Ayats C, Pericàs MA. Synthesis and catalytic applications of C3-symmetric tris(triazolyl)methanol ligands and derivatives. Chem Commun (Camb) 2016; 52:1997-2010. [PMID: 26701737 DOI: 10.1039/c5cc08961a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Recently introduced tris(1,2,3-triazol-4-yl)methanols and derivatives (TTM ligands) have become a valuable subclass of C3-symmetric tripodal ligands for transition metal-mediated reactions. TTM-based ligand architectures are modularly constructed through regioselective, one-pot triple [3+2] cycloaddition of azides and alkynes. Applications of homogeneous systems of this type and of heterogenised (polystyrene- and magnetic nanoparticle-supported) TTM ligands in synthesis and catalysis are compiled in this Feature Article.
Collapse
Affiliation(s)
- Pablo Etayo
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans 16, E-43007 Tarragona, Spain.
| | - Carles Ayats
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans 16, E-43007 Tarragona, Spain.
| | - Miquel A Pericàs
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans 16, E-43007 Tarragona, Spain. and Departament de Química Orgànica, Universitat de Barcelona, 08028 Barcelona, Spain
| |
Collapse
|
14
|
Ötvös SB, Szloszár A, Mándity IM, Fülöp F. Heterogeneous Dipeptide-Catalyzed α-Amination of Aldehydes in a Continuous-Flow Reactor: Effect of Residence Time on Enantioselectivity. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500375] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
15
|
Chacko S, Ramapanicker R. Diastereoselective Synthesis of 1-Deoxygalactonojirimycin, 1-Deoxyaltronojirimycin, and N-Boc-(2S,3S)-3-Hydroxypipecolic Acid via Proline Catalyzed α-Aminoxylation of Aldehydes. J Org Chem 2015; 80:4776-82. [DOI: 10.1021/acs.joc.5b00424] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shibin Chacko
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India 208016
| | - Ramesh Ramapanicker
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India 208016
| |
Collapse
|
16
|
Atodiresei I, Vila C, Rueping M. Asymmetric Organocatalysis in Continuous Flow: Opportunities for Impacting Industrial Catalysis. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00002] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Iuliana Atodiresei
- RWTH Aachen University, Institute
of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Carlos Vila
- RWTH Aachen University, Institute
of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Magnus Rueping
- RWTH Aachen University, Institute
of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| |
Collapse
|
17
|
Rodríguez-Escrich C, Pericàs MA. Organocatalysis on Tap: Enantioselective Continuous Flow Processes Mediated by Solid-Supported Chiral Organocatalysts. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403042] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
18
|
Marholz LJ, Chang L, Old WM, Wang X. Development of substrate-selective probes for affinity pulldown of histone demethylases. ACS Chem Biol 2015; 10:129-37. [PMID: 25335116 PMCID: PMC4301071 DOI: 10.1021/cb5006867] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
![]()
JmjC-domain
containing histone demethylases (JHDMs) play critical
roles in many key cellular processes and have been implicated in multiple
disease conditions. Each enzyme within this family is known to have
a strict substrate scope, specifically the position of the lysine
within the histone and its degree of methylation. While much progress
has been made in determining the substrates of each enzyme, new methods
with which to systematically profile each histone mark are greatly
needed. Novel chemical tools have the potential to fill this role
and, furthermore, can be used as probes to answer fundamental questions
about these enzymes and serve as potential therapeutic leads. In this
work, we first investigated three small-molecule probes differing
in the degree of “methylation state” and their differential
bindings to JHDM1A (an H3K36me1/2 demethylase) using a fluorescence
polarization-based competition assay. We then applied this specificity
toward the “methylation state” and combined it with
specificity toward lysine position in the design and synthesis of
a peptidic probe targeting H3K36me2 JHDMs. The probe is further functionalized
with a benzophenone cross-linking moiety and a biotin for affinity
purification. Results showed binding of the peptidic probe to JHDM1A
and specific enrichment of this protein in the presence of its native
histone substrates. Affinity purification pulldown experiments from
nuclear lysate coupled with mass spectrometry revealed the capability
of the probe to pull out and enrich JHDMs along with other epigenetic
proteins and transcriptional regulators.
Collapse
Affiliation(s)
- Laura J. Marholz
- Department of Chemistry and
Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Le Chang
- Department of Chemistry and
Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - William M. Old
- Department of Chemistry and
Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Xiang Wang
- Department of Chemistry and
Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| |
Collapse
|
19
|
Finelli FG, Miranda LSM, de Souza ROMA. Expanding the toolbox of asymmetric organocatalysis by continuous-flow process. Chem Commun (Camb) 2015; 51:3708-22. [DOI: 10.1039/c4cc08748h] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite all the organic chemistry reaction methodologies already developed for the continuous-flow process, asymmetric synthesis is one that has gained less attention.
Collapse
Affiliation(s)
- Fernanda G. Finelli
- Institute of Natural Products Research
- Center of Health Sciences
- Federal University of Rio de Janeiro
- CEP 21941902
- Brazil
| | - Leandro S. M. Miranda
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- CEP 21941909
- Brazil
| | - Rodrigo O. M. A. de Souza
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- CEP 21941909
- Brazil
| |
Collapse
|
20
|
Sagamanova IK, Sayalero S, Martínez-Arranz S, Albéniz AC, Pericàs MA. Asymmetric organocatalysts supported on vinyl addition polynorbornenes for work in aqueous media. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01344a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Proline-functionalized VA-PNBs behave as active, recoverable and reusable organocatalysts for the asymmetric direct aldol reaction in aqueous media.
Collapse
Affiliation(s)
| | - Sonia Sayalero
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona
- Spain
| | | | - Ana C. Albéniz
- IU CINQUIMA/Química Inorgánica
- Universidad de Valladolid
- 47071 Valladolid
- Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona
- Spain
- Departament de Química Orgànica
- Universitat de Barcelona
| |
Collapse
|
21
|
Scatena GS, de la Torre AF, Cass QB, Rivera DG, Paixão MW. Multicomponent Approach to Silica-Grafted Peptide Catalysts: A 3 D Continuous-Flow Organocatalytic System with On-line Monitoring of Conversion and Stereoselectivity. ChemCatChem 2014. [DOI: 10.1002/cctc.201402501] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
22
|
Ayats C, Henseler AH, Dibello E, Pericàs MA. Continuous Flow Enantioselective Three-Component anti-Mannich Reactions Catalyzed by a Polymer-Supported Threonine Derivative. ACS Catal 2014. [DOI: 10.1021/cs5006037] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carles Ayats
- Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans, 16, E-43007 Tarragona, Spain
| | - Andrea H. Henseler
- Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans, 16, E-43007 Tarragona, Spain
| | - Estefanía Dibello
- Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans, 16, E-43007 Tarragona, Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans, 16, E-43007 Tarragona, Spain
- Departament
de Química Orgànica, Universitat de Barcelona (UB), E-08028 Barcelona, Spain
| |
Collapse
|
23
|
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]
|
24
|
Ozkal E, Llanes P, Bravo F, Ferrali A, Pericàs MA. Fine-Tunable Tris(triazolyl)methane Ligands for Copper(I)- Catalyzed Azide-Alkyne Cycloaddition Reactions. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300887] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
25
|
Fernandes AE, Jonas AM, Riant O. Application of CuAAC for the covalent immobilization of homogeneous catalysts. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.034] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
26
|
Miranda PO, Llanes P, Torkian L, Pericàs MA. A Fluorous Proline Organocatalyst with Acetone-Dependent Aldolase Behavior. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
27
|
Kasaplar P, Rodríguez-Escrich C, Pericàs MA. Continuous flow, highly enantioselective Michael additions catalyzed by a PS-supported squaramide. Org Lett 2013; 15:3498-501. [PMID: 23837657 DOI: 10.1021/ol400974z] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A polystyrene (PS) supported bifunctional squaramide organocatalyst promotes fast Michael addition of 2-hydroxy-1,4-naphthoquinone to nitroalkenes with very high enantioselectivities at low catalyst loadings. The polystyrene supported catalyst can be recycled up to 10 times without any decrease in enantioselectivity (average 96% ee) and adapted to continuous flow operation (24 h). A single flow experiment involving six different nitroalkenes in a sequential manner highlights the applicability of this methodology for rapid access to chemical diversity.
Collapse
Affiliation(s)
- Pinar Kasaplar
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | | | | |
Collapse
|
28
|
Zammit CM, Wills M. Use of triazole-ring formation to attach a Ru/TsDPEN complex for asymmetric transfer hydrogenation to a soluble polymer. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
29
|
Bortolini O, Cavazzini A, Giovannini PP, Greco R, Marchetti N, Massi A, Pasti L. A combined kinetic and thermodynamic approach for the interpretation of continuous-flow heterogeneous catalytic processes. Chemistry 2013; 19:7802-8. [PMID: 23589216 DOI: 10.1002/chem.201300181] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Indexed: 11/06/2022]
Abstract
The heterogeneous proline-catalyzed aldol reaction was investigated under continuous-flow conditions by means of a packed-bed microreactor. Reaction-progress kinetic analysis (RPKA) was used in combination with nonlinear chromatography for the interpretation, under synthetically relevant conditions, of important mechanistic aspects of the heterogeneous catalytic process at a molecular level. The information gathered by RPKA and nonlinear chromatography proved to be highly complementary and allowed for the assessment of optimal operating variables. In particular, the determination of the rate-determining step was pivotal for optimizing the feed composition. On the other hand, the competitive product inhibition was responsible for the unexpected decrease in the reaction yield following an apparently obvious variation in the feed composition. The study was facilitated by a suitable 2D instrumental arrangement for simultaneous flow reaction and online flow-injection analysis.
Collapse
Affiliation(s)
- Olga Bortolini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Laboratorio di Chimica Organica, Università di Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy
| | | | | | | | | | | | | |
Collapse
|
30
|
Affiliation(s)
- Dongbo Zhao
- Bayer Technology & Engineering (Shanghai) Co., Ltd., 82 Mu Hua Road, Shanghai Chemical Industry Park, Shanghai 201507, People’s Republic of China
| | - Kuiling Ding
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032,
People’s Republic of China
| |
Collapse
|
31
|
Asymmetric aldol reaction in a continuous-flow reactor catalyzed by a highly reusable heterogeneous peptide. J Catal 2012. [DOI: 10.1016/j.jcat.2012.08.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
32
|
Kasaplar P, Riente P, Hartmann C, Pericàs MA. A Polystyrene-Supported, Highly Recyclable Squaramide Organocatalyst for the Enantioselective Michael Addition of 1,3-Dicarbonyl Compounds to β-Nitrostyrenes. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200526] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
33
|
O'Brien M, Koos P, Browne DL, Ley SV. A prototype continuous-flow liquid-liquid extraction system using open-source technology. Org Biomol Chem 2012; 10:7031-6. [PMID: 22858870 DOI: 10.1039/c2ob25912e] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A prototype continuous-flow liquid-liquid extraction system is reported. By harnessing several open-source software libraries, a computer control script was written using the Python programming language. Using a 'computer-vision' approach, this allowed the computer to monitor the interface level between the organic and aqueous phases using a simple webcam setup and (by dynamically controlling pump flow rate) to keep this interface within defined limits. The system enabled the efficient 'inline' extraction of excess reagent in hydrazone formations, dithiane formations and epoxidations. The initial results of dispersion measurement are also presented.
Collapse
Affiliation(s)
- Matthew O'Brien
- Whiffen Laboratory, Department of Chemistry, University of Cambridge, Cambridge, UK. m.o’
| | | | | | | |
Collapse
|
34
|
Fredriksen KA, Kristensen TE, Hansen T. Combined bead polymerization and Cinchona organocatalyst immobilization by thiol-ene addition. Beilstein J Org Chem 2012; 8:1126-33. [PMID: 23019440 PMCID: PMC3458730 DOI: 10.3762/bjoc.8.125] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 06/25/2012] [Indexed: 11/23/2022] Open
Abstract
In this work, we report an unusually concise immobilization of Cinchona organocatalysts using thiol-ene chemistry, in which catalyst immobilization and bead polymerization is combined in a single step. A solution of azo initiator, polyfunctional thiol, polyfunctional alkene and an unmodified Cinchona-derived organocatalyst in a solvent is suspended in water and copolymerized on heating by thiol-ene additions. The resultant spherical and gel-type polymer beads have been evaluated as organocatalysts in catalytic asymmetric transformations.
Collapse
Affiliation(s)
- Kim A Fredriksen
- Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, NO-0315 Oslo, Norway
| | | | | |
Collapse
|
35
|
|
36
|
Rueping M, Bootwicha T, Sugiono E. Continuous-flow catalytic asymmetric hydrogenations: Reaction optimization using FTIR inline analysis. Beilstein J Org Chem 2012; 8:300-7. [PMID: 22423298 PMCID: PMC3302093 DOI: 10.3762/bjoc.8.32] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 02/13/2012] [Indexed: 01/03/2023] Open
Abstract
The asymmetric organocatalytic hydrogenation of benzoxazines, quinolines, quinoxalines and 3H-indoles in continuous-flow microreactors has been developed. Reaction monitoring was achieved by using an inline ReactIR flow cell, which allows fast and convenient optimization of reaction parameters. The reductions proceeded well, and the desired products were isolated in high yields and with excellent enantioselectivities.
Collapse
Affiliation(s)
- Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | | | | |
Collapse
|
37
|
Ayats C, Henseler AH, Pericàs MA. A solid-supported organocatalyst for continuous-flow enantioselective aldol reactions. CHEMSUSCHEM 2012; 5:320-5. [PMID: 22442839 DOI: 10.1002/cssc.201100570] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Asymmetric aldol reactions catalyzed by a novel polystyrene-immobilized proline derivative occur in short reaction times with excellent diastereo- and enantioselectivity. The catalyst can be recovered by simple filtration and shows very high reusability. The high activity depicted by the supported catalyst and its chemical and mechanical stability have allowed its application in packed-bed reactors for continuous flow processing. This system can produce enantio- and diastereomerically pure aldol adducts under continuous flow conditions with a residence time of 26 min. Furthermore, the reactor allowed processing of four different aldol products in sequence without any decrease in both catalytic activity and optical purity. The effective catalyst loading could be reduced to 1.6% (six-fold reduction of catalyst loading compared to the corresponding batch process).
Collapse
Affiliation(s)
- Carles Ayats
- Institute of Chemical Research of Catalonia (ICIQ), Tarragona, Spain
| | | | | |
Collapse
|
38
|
Fan X, Alza E, Pericàs MA. A highly active organocatalyst for the asymmetric α-aminoxylation of aldehydes and α-hydroxylation of ketones. RSC Adv 2012. [DOI: 10.1039/c2ra20968c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
39
|
Rueping M, Bootwicha T, Baars H, Sugiono E. Continuous-flow hydration-condensation reaction: Synthesis of α,β-unsaturated ketones from alkynes and aldehydes by using a heterogeneous solid acid catalyst. Beilstein J Org Chem 2011; 7:1680-7. [PMID: 22238547 PMCID: PMC3252873 DOI: 10.3762/bjoc.7.198] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Accepted: 12/12/2011] [Indexed: 11/23/2022] Open
Abstract
A simple, practical and efficient continuous-flow hydration-condensation protocol was developed for the synthesis of α,β-unsaturated ketones starting from alkynes and aldehydes by employing a heterogeneous catalyst in a flow microwave. The procedure presents a straightforward and convenient access to valuable differently substituted chalcones and can be applied on multigram scale.
Collapse
Affiliation(s)
- Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Teerawut Bootwicha
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Hannah Baars
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Erli Sugiono
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| |
Collapse
|