1
|
Karimi B, Jafari E, Mansouri F, Tavakolian M. Catalytic asymmetric Friedel-Crafts alkylation of unprotected indoles with nitroalkenes using a novel chiral Yb(OTf) 3-pybox complex. Sci Rep 2023; 13:14736. [PMID: 37679477 PMCID: PMC10484919 DOI: 10.1038/s41598-023-41921-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023] Open
Abstract
Chiral chloro-indeno pybox has served as a new ligand for the Yb(OTf)3-catalyzed asymmetric Friedel-Crafts alkylation reaction of indoles with nitroalkenes. The tunable nature of pybox ligands enables the rational design of catalysts for optimal performance in terms of both activity and stereoselectivity in a Friedel-Crafts-type reaction. Good to excellent yields and enantioselectivities were obtained for a relatively wide range of substrates, including sterically hindered compounds, under optimized reaction conditions.
Collapse
Affiliation(s)
- Babak Karimi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran.
- Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan, 45137-66731, Iran.
| | - Ehsan Jafari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran
| | - Fariborz Mansouri
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran
| | - Mina Tavakolian
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran
| |
Collapse
|
2
|
Némethová V, Krištofíková D, Mečiarová M, Šebesta R. Asymmetric Organocatalysis Under Mechanochemical Conditions. CHEM REC 2023:e202200283. [PMID: 36703542 DOI: 10.1002/tcr.202200283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/05/2023] [Indexed: 01/28/2023]
Abstract
Asymmetric organocatalysis is a robust methodology providing access to numerous valuable compounds while having green chemistry principles in mind. The realization of organocatalytic transformation under solvent-free mechanochemical conditions brings additional benefits in terms of yields, selectivities, and, last but not least overall improved sustainability. This overview describes developments in the use of mechanochemistry as a vehicle for asymmetric organocatalytic transformations. The material is organized according to main catalytic activation modes, starting with covalent activation and proceeding to non-covalent activation modes. The advantages of mechanochemical organocatalytic reactions are particularly highlighted, but in some cases also, limitations are mentioned. Possibilities for target compound synthesis are also discussed.
Collapse
Affiliation(s)
- Viktória Némethová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15, Bratislava, Slovakia
| | - Dominika Krištofíková
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15, Bratislava, Slovakia
| | - Mária Mečiarová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15, Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15, Bratislava, Slovakia
| |
Collapse
|
3
|
Williams MTJ, Morrill LC, Browne DL. Mechanochemical Organocatalysis: Do High Enantioselectivities Contradict What We Might Expect? CHEMSUSCHEM 2022; 15:e202102157. [PMID: 34767693 PMCID: PMC9300213 DOI: 10.1002/cssc.202102157] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/09/2021] [Indexed: 05/10/2023]
Abstract
Ball mills input energy to samples by pulverising the contents of the jar. Each impact on the sample or wall of the jar results in an instantaneous transmission of energy in the form of a temperature and pressure increase (volume reduction). Conversely, enantioselective organocatalytic reactions proceed through perceived delicate and well-organised transition states. Does there exist a dichotomy in the idea of enantioselective mechanochemical organocatalysis? This Review provides a survey of the literature reporting the combination of organocatalytic reactions with mechanochemical ball milling conditions. Where possible, direct comparisons of stirred in solution, stirred neat and ball milled processes are drawn with a particular focus on control of stereoselectivity.
Collapse
Affiliation(s)
- Matthew T. J. Williams
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityPark PlaceCardiffCF10 3ATUK
| | - Louis C. Morrill
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityPark PlaceCardiffCF10 3ATUK
| | - Duncan L. Browne
- Department of Pharmaceutical and Biological ChemistrySchool of PharmacyUniversity College London29–39 Brunswick Square, BloomsburyLondonWC1N 1AXUK
| |
Collapse
|
4
|
Efficacy of Selenourea Organocatalysts in Asymmetric Michael Reactions under Standard and Solvent-Free Conditions. Molecules 2021; 26:molecules26237303. [PMID: 34885885 PMCID: PMC8658871 DOI: 10.3390/molecules26237303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/18/2022] Open
Abstract
By varying the steric and electronic surroundings of the hydrogen-bonding motif, the novel chiral Cinchona-alkaloid based selenoureas were developed. Acting as bifunctional catalysts, they were applied in the Michael reactions of dithiomalonate and nitrostyrene providing chiral adducts with up to 96% ee. The asymmetric Michael–-hemiacetalization reaction of benzylidene pyruvate and dimedone, performed with the assistance of 5 mol% of selenoureas, furnished the product with up to 93% ee and excellent yields. The effectiveness of the new hydrogen-bond donors was also proved in solvent-free reactions under ball mill conditions, supporting the sustainability of the devised catalytic protocol.
Collapse
|
5
|
Mała ŻA, Janicki MJ, Niedźwiecka NH, Góra RW, Konieczny KA, Kowalczyk R. Stereoselectivity Enhancement During the Generation of Three Contiguous Stereocenters in Tetrahydrothiophenes. ChemCatChem 2021. [DOI: 10.1002/cctc.202001583] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Żaneta A. Mała
- Bioorganic Chemistry Faculty of Chemistry Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Mikołaj J. Janicki
- Physical and Quantum Chemistry Faculty of Chemistry Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Natalia H. Niedźwiecka
- Bioorganic Chemistry Faculty of Chemistry Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Robert W. Góra
- Physical and Quantum Chemistry Faculty of Chemistry Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Krzysztof A. Konieczny
- Faculty of Chemistry Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Rafał Kowalczyk
- Bioorganic Chemistry Faculty of Chemistry Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| |
Collapse
|
6
|
Čmelová P, Vargová D, Šebesta R. Hybrid Peptide-Thiourea Catalyst for Asymmetric Michael Additions of Aldehydes to Heterocyclic Nitroalkenes. J Org Chem 2021; 86:581-592. [PMID: 33258590 DOI: 10.1021/acs.joc.0c02251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Bifunctional organocatalysis combining covalent and noncovalent activation is presented. The hybrid peptide-thiourea catalyst features a N-terminal proline moiety for aldehyde activation and a thiourea unit for electrophile activation. This catalyst effectively promotes asymmetric Michael additions of aldehydes to challenging but biologically relevant heterocycle-containing nitroalkenes. The catalyst can be used under solvent-free conditions. Spectroscopic and density functional theory studies elucidate the catalyst structure and mode of action.
Collapse
Affiliation(s)
- Patrícia Čmelová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Denisa Vargová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| |
Collapse
|
7
|
Mondal D, Kalar PL, Kori S, Gayen S, Das K. Recent Developments on Synthesis of Indole Derivatives Through Green Approaches and Their Pharmaceutical Applications. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999201111203812] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Indole moiety is often found in different classes of pharmaceutically active molecules
having various biological activities including anticancer, anti-viral, anti-psychotic, antihypertensive,
anti-migraine, anti-arthritis and analgesic activities. Due to enormous applications
of indole derivatives in pharmaceutical chemistry, a number of conventional synthetic
methods as well as green methodology have been developed for their synthesis. Green methodology
has many advantages including high yields, short reaction time, and inexpensive
reagents, highly efficient and environmentally benign over conventional methods. Currently,
the researchers in academia as well as in pharmaceutical industries have been developing
various methods for the chemical synthesis of indole based compounds via green approaches
to overcome the drawbacks of conventional methods. This review reflects the last ten years
developments of the various greener methods for the synthesis of indole derivatives by using microwave, ionic liquids,
water, ultrasound, nanocatalyst, green catalyst, multicomponent reaction and solvent-free reactions etc. (please
see the scheme below). Furthermore, the applications of green chemistry towards developments of indole containing
pharmaceuticals and their biological studies have been represented in this review.
Collapse
Affiliation(s)
- Dipayan Mondal
- Laboratory of Drug Design and Discovery, Department of Pharmaceutical Sciences, Dr. Harisingh Gour University, Sagar, Madhya Pradesh 470003, India
| | - Pankaj Lal Kalar
- Advanced Organic Synthesis Laboratory, Department of Chemistry, Dr. Harisingh Gour University, Sagar, Madhya Pradesh 470003, India
| | - Shivam Kori
- Laboratory of Drug Design and Discovery, Department of Pharmaceutical Sciences, Dr. Harisingh Gour University, Sagar, Madhya Pradesh 470003, India
| | - Shovanlal Gayen
- Laboratory of Drug Design and Discovery, Department of Pharmaceutical Sciences, Dr. Harisingh Gour University, Sagar, Madhya Pradesh 470003, India
| | - Kalpataru Das
- Advanced Organic Synthesis Laboratory, Department of Chemistry, Dr. Harisingh Gour University, Sagar, Madhya Pradesh 470003, India
| |
Collapse
|
8
|
Mammadova F, Hamarat B, Ahmadli D, Şahin O, Bozkaya U, Türkmen YE. Polarization‐Enhanced Hydrogen Bonding in 1,8‐Dihydroxynaphthalene: Conformational Analysis, Binding Studies and Hydrogen Bonding Catalysis. ChemistrySelect 2020. [DOI: 10.1002/slct.202002960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Flora Mammadova
- Department of Chemistry, Faculty of Science Bilkent University Ankara 06800 Turkey
| | - Büşra Hamarat
- Department of Chemistry Hacettepe University Ankara 06800 Turkey
| | - Dilgam Ahmadli
- Department of Chemistry, Faculty of Science Bilkent University Ankara 06800 Turkey
| | - Onur Şahin
- Scientific and Technological Research Application and Research Center Sinop University Sinop 57000 Turkey
| | - Uğur Bozkaya
- Department of Chemistry Hacettepe University Ankara 06800 Turkey
| | - Yunus E. Türkmen
- Department of Chemistry, Faculty of Science Bilkent University Ankara 06800 Turkey
- UNAM-National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology Bilkent University Ankara 06800 Turkey
| |
Collapse
|
9
|
Sun X, Shi W, Zhou XY, Ding S. Facile Mechanochemical Preparation of Polyamide-derivatives via Solid-state Benzoxazine-isocyanide Chemistry. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-021-2510-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
10
|
Krištofíková D, Modrocká V, Mečiarová M, Šebesta R. Green Asymmetric Organocatalysis. CHEMSUSCHEM 2020; 13:2828-2858. [PMID: 32141177 DOI: 10.1002/cssc.202000137] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/05/2020] [Indexed: 06/10/2023]
Abstract
Asymmetric organocatalysis is becoming one of the main tools for the synthesis of chiral compounds that are needed as medicines, crop protection agents, and other bioactive molecules. It can be effectively combined with various green chemistry methodologies. Intensification techniques, such as ball milling, flow, high pressure, or light, bring not only higher yields, faster reactions, and easier product isolation, but also new reactivities. More sustainable reaction media, such as ionic liquids, deep eutectic solvents, green solvent alternatives, and water, also considerably enhance the sustainability profile of many organocatalytic reactions.
Collapse
Affiliation(s)
- Dominika Krištofíková
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Viktória Modrocká
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Mária Mečiarová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| |
Collapse
|
11
|
Concellón C, Martín J, Gallegos M, Fanjul-Mosteirín N, Costales A, Pendás ÁM, Del Amo V. Mimicking Enzymes: Asymmetric Induction inside a Carbamate-Based Steroidal Cleft. Org Lett 2019; 21:3994-3997. [PMID: 31140819 DOI: 10.1021/acs.orglett.9b01170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cholic acid has been elaborated into a carbamate-based tripodal architecture, which is able to promote an asymmetric organic transformation inside its chiral cavity. The nature of this steroidal catalyst has been disclosed by quantum-chemical calculations. It comprises the preorganization and confinement of the reagents within the cavity of the steroid to form a supramolecular complex held together by means of cooperative H-bond contacts. This operational mode resembles that of some enzymes.
Collapse
Affiliation(s)
- Carmen Concellón
- Departamento de Química Orgánica e Inorgánica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| | - Judith Martín
- Departamento de Química Orgánica e Inorgánica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| | - Miguel Gallegos
- Departamento de Química Física y Analítica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| | - Noé Fanjul-Mosteirín
- Departamento de Química Orgánica e Inorgánica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| | - Aurora Costales
- Departamento de Química Física y Analítica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| | - Ángel Martín Pendás
- Departamento de Química Física y Analítica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| | - Vicente Del Amo
- Departamento de Química Orgánica e Inorgánica , Universidad de Oviedo , C/Julián Clavería 8 , 33006 Oviedo , Spain
| |
Collapse
|
12
|
Tavakolian M, Vahdati‐Khajeh S, Asgari S. Recent Advances in Solvent‐Free Asymmetric Catalysis. ChemCatChem 2019. [DOI: 10.1002/cctc.201900354] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Mina Tavakolian
- Department of ChemistryInstitute for Advanced Studies in Basic Sciences (IASBS) Zanjan 45137-6731 Iran
| | | | - Sepideh Asgari
- Department of ChemistryInstitute for Advanced Studies in Basic Sciences (IASBS) Zanjan 45137-6731 Iran
| |
Collapse
|
13
|
Ignatiuk ŻA, Janicki MJ, Góra RW, Konieczny K, Kowalczyk R. Applications of Thermal Activation, Ball-milling and Aqueous Medium in Stereoselective Michael Addition of Nitromethane to Enynones Catalyzed by Chiral Squaramides. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801498] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Żaneta A. Ignatiuk
- Department of Organic Chemistry, Faculty of Chemistry; Wrocław University of Science and Technology; Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Mikołaj J. Janicki
- Department of Physical and Quantum Chemistry, Faculty of Chemistry; Wrocław University of Science and Technology; Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Robert W. Góra
- Department of Physical and Quantum Chemistry, Faculty of Chemistry; Wrocław University of Science and Technology; Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Krzysztof Konieczny
- Faculty of Chemistry; Wrocław University of Science and Technology; Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| | - Rafał Kowalczyk
- Department of Organic Chemistry, Faculty of Chemistry; Wrocław University of Science and Technology; Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
| |
Collapse
|
14
|
Zhao S, Li Y, Liu C, Zhao Y. Recent advances in mechanochemical C–H functionalization reactions. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
15
|
Affiliation(s)
- Davin Tan
- Department of Chemistry; McGill University; 801 Sherbrooke St.W. H3A0B8 Montreal Canada
| | - Tomislav Friščić
- Department of Chemistry; McGill University; 801 Sherbrooke St.W. H3A0B8 Montreal Canada
| |
Collapse
|
16
|
Otevrel J, Bobal P. Diamine-Tethered Bis(thiourea) Organocatalyst for Asymmetric Henry Reaction. J Org Chem 2017; 82:8342-8358. [DOI: 10.1021/acs.joc.7b00079] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jan Otevrel
- Department of Chemical Drugs,
Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences (UVPS) Brno, Palackeho 1946/1, 612 42 Brno, Czech Republic
| | - Pavel Bobal
- Department of Chemical Drugs,
Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences (UVPS) Brno, Palackeho 1946/1, 612 42 Brno, Czech Republic
| |
Collapse
|
17
|
Veverková E, Modrocká V, Šebesta R. Organocatalyst Efficiency in the α-Aminoxylation and α-Hydrazination of Carbonyl Derivatives in Aqueous Media or in a Ball-Mill. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601357] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Eva Veverková
- Department of Organic Chemistry; Faculty of Natural Sciences; Comenius University in Bratislava; Mlynska dolina, Ilkovicova 6 84215 Bratislava Slovakia
| | - Viktória Modrocká
- Department of Organic Chemistry; Faculty of Natural Sciences; Comenius University in Bratislava; Mlynska dolina, Ilkovicova 6 84215 Bratislava Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry; Faculty of Natural Sciences; Comenius University in Bratislava; Mlynska dolina, Ilkovicova 6 84215 Bratislava Slovakia
| |
Collapse
|
18
|
Peňaška T, Ormandyová K, Mečiarová M, Filo J, Šebesta R. Organocatalytic diastereoselective synthesis of spirooxindoles via [3+2] cycloadditions of azomethine ylides with α,β-unsaturated esters. NEW J CHEM 2017. [DOI: 10.1039/c7nj00189d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isatin-derived azomethine ylides react diastereoselectively with unsaturated esters to afford densely substituted spirooxindols.
Collapse
Affiliation(s)
- Tibor Peňaška
- Department of Organic Chemistry
- Faculty of Natural Sciences
- Comenius University in Bratislava
- Mlynská dolina
- 842 15 Bratislava
| | - Kristína Ormandyová
- Department of Organic Chemistry
- Faculty of Natural Sciences
- Comenius University in Bratislava
- Mlynská dolina
- 842 15 Bratislava
| | - Mária Mečiarová
- Department of Organic Chemistry
- Faculty of Natural Sciences
- Comenius University in Bratislava
- Mlynská dolina
- 842 15 Bratislava
| | - Juraj Filo
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University in Bratislava
- Mlynská dolina
- 842 15 Bratislava
| | - Radovan Šebesta
- Department of Organic Chemistry
- Faculty of Natural Sciences
- Comenius University in Bratislava
- Mlynská dolina
- 842 15 Bratislava
| |
Collapse
|
19
|
Sukhanova AA, Nelyubina YV, Zlotin SG. Asymmetric synthesis of 3-prenyl-substituted pyrrolidin-2-ones. MENDELEEV COMMUNICATIONS 2016. [DOI: 10.1016/j.mencom.2016.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
20
|
Palmieri A, Petrini M. Sulfonyl Azoles in the Synthesis of 3-Functionalized Azole Derivatives. CHEM REC 2016; 16:1353-79. [PMID: 27147297 DOI: 10.1002/tcr.201500291] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Indexed: 12/22/2022]
Abstract
Sulfonyl indoles, as well as related azolyl derivatives, have been recently introduced in synthesis as stable precursors of reactive indolenine intermediates. This personal account reports on the discovery of sulfonyl azoles and their practical utilization in many synthetic processes for the preparation of functionalized 3-substituted indoles, indazoles, and pyrroles. The indolenine intermediates obtained by treatment of sulfonyl azoles with Brønsted bases or Lewis acids can be considered as vinylogous imino derivatives that can be made to react with different nucleophilic reagents. These include organometallic reagents, reducing agents, stabilized carbanions, and heteronucleophiles. The controlled and mild conditions for the generation of indolenines from sulfonyl azoles make these substrates particularly useful in asymmetric synthesis, exploiting organo- or metal-catalyzed processes. Although less exploited, sulfonyl indoles can also be involved in photochemical processes for the preparation of polycyclic derivatives.
Collapse
Affiliation(s)
- Alessandro Palmieri
- School of Science and Technology, Chemistry Division, Università di Camerino, via S. Agostino 1, 62032, Camerino, Italy
| | - Marino Petrini
- School of Science and Technology, Chemistry Division, Università di Camerino, via S. Agostino 1, 62032, Camerino, Italy
| |
Collapse
|
21
|
Polindara-García LA, Juaristi E. Synthesis of Ugi 4-CR and Passerini 3-CR Adducts under Mechanochemical Activation. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501371] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
22
|
Ashokkumar V, Siva A. Cinchona alkaloid-based chiral catalysts act as highly efficient multifunctional organocatalysts for the asymmetric conjugate addition of malonates to nitroolefins. Org Biomol Chem 2015; 13:10216-25. [PMID: 26308733 DOI: 10.1039/c5ob01351h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
New pentaerythritol tetrabromide-based chiral quaternary ammonium salts acting as organocatalysts (7a and 7b) have been prepared and used as organocatalysts for enantioselective Michael addition reactions between various nitroolefins and Michael donors (malonates) under mild reaction conditions, such as lower concentration of base and catalyst and room temperature, with very good chemical yields (up to 97%) and ee's (up to 99%).
Collapse
Affiliation(s)
- Veeramanoharan Ashokkumar
- Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India.
| | | |
Collapse
|
23
|
|
24
|
Zhang Z, Wang FJ, Wu HH, Tan YJ. Straightforward Synthesis of 2-Anilinobenzoxazoles and -benzothiazoles via Mechanochemical Ball-milling-promoted One-pot Reactions. CHEM LETT 2015. [DOI: 10.1246/cl.141127] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Ze Zhang
- School of Biological and Chemical Engineering, Anhui Polytechnic University
| | - Fang-Jian Wang
- School of Biological and Chemical Engineering, Anhui Polytechnic University
| | - Hao-Hao Wu
- School of Biological and Chemical Engineering, Anhui Polytechnic University
| | - Ya-Jun Tan
- School of Biological and Chemical Engineering, Anhui Polytechnic University
| |
Collapse
|
25
|
Jörres M, Aceña JL, Soloshonok VA, Bolm C. Asymmetric Carbon-Carbon Bond Formation under Solventless Conditions in Ball Mills. ChemCatChem 2015. [DOI: 10.1002/cctc.201500102] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
26
|
Machuca E, Rojas Y, Juaristi E. Synthesis and Evaluation of (S)-Proline-Containing α,β-Dipeptides as Organocatalysts in Solvent-Free Asymmetric Aldol Reactions Under Ball-Milling Conditions. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402170] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
27
|
Tan YJ, Zhang Z, Wang FJ, Wu HH, Li QH. Mechanochemical milling promoted solvent-free imino Diels–Alder reaction catalyzed by FeCl3: diastereoselective synthesis of cis-2,4-diphenyl-1,2,3,4-tetrahydroquinolines. RSC Adv 2014. [DOI: 10.1039/c4ra05252h] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cis-2,4-diphenyl-1,2,3,4-tetrahydroquinolines were diastereoselectively synthesized by FeCl3-promoted solvent-free Diels–Alder reaction of in situ generated imine with styrene under ball milling.
Collapse
Affiliation(s)
- Ya-Jun Tan
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu, China
| | - Ze Zhang
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu, China
| | - Fang-Jian Wang
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu, China
| | - Hao-Hao Wu
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu, China
| | - Qing-Hai Li
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu, China
| |
Collapse
|