1
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Graf S, Pesch H, Appleson T, Lei T, Breder A, Siewert I. Mechanistic Analysis Reveals Key Role of Interchalcogen Multicatalysis in Photo-Aerobic 3-Pyrroline Syntheses by Aza-Wacker Cyclizations. CHEMSUSCHEM 2024; 17:e202301518. [PMID: 38214219 DOI: 10.1002/cssc.202301518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/01/2024] [Accepted: 01/10/2024] [Indexed: 01/13/2024]
Abstract
A light-driven dual and ternary catalytic aza-Wacker protocol for the construction of 3-pyrrolines by partially disulfide-assisted selenium-π-acid multicatalysis is reported. A structurally diverse array of sulfonamides possessing homopolar mono-, di- and trisubstituted olefinic double bonds is selectively converted to the corresponding 3-pyrrolines in up to 95 % isolated yield and with good functional group tolerance. Advanced electrochemical mechanistic investigations of the protocol suggest a dual role of the disulfide co-catalyst. On the one hand, the disulfide serves as an electron hole shuttle between the excited photoredox catalyst and the selenium co-catalyst. On the other hand, the sulfur species engages in the final, product releasing step of the catalytic cycle by accelerating the β-elimination of the selenium moiety, which was found in many cases to lead to considerably improved product yields.
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Affiliation(s)
- Sebastian Graf
- Universität Regensburg, Institut für Organische Chemie, Universitätstrasse 31, 93053, Regensburg, Germany
| | - Henner Pesch
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstrasse 4, 37077, Göttingen, Germany
| | - Theresa Appleson
- Universität Regensburg, Institut für Organische Chemie, Universitätstrasse 31, 93053, Regensburg, Germany
| | - Tao Lei
- Universität Regensburg, Institut für Organische Chemie, Universitätstrasse 31, 93053, Regensburg, Germany
| | - Alexander Breder
- Universität Regensburg, Institut für Organische Chemie, Universitätstrasse 31, 93053, Regensburg, Germany
| | - Inke Siewert
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstrasse 4, 37077, Göttingen, Germany
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2
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Leblanc J, Boutin M, Vega C, Mathé-Allainmat M, Grosse S, Guillemont J, Lebreton J, Tessier A. A new synthetic route towards multifunctionalized cyclic amidrazones for feeding chemical space. Org Biomol Chem 2024; 22:2404-2408. [PMID: 38411004 DOI: 10.1039/d3ob02092d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
In the context of growing impetus to develop new molecular scaffolds as well as a variety of 3D fragments to escape from flatland, we have reintroduced the accessibility of the underexplored azaheterocyclic amidrazones as promising bioisosteres. Herein, we present an original and versatile approach to synthesize cyclic amidrazones functionalized at different positions of the scaffold in view of diversifying the substitution pattern towards multifunctionalization, extension or fusion of the ring system and 3D-shaping of fragments. This unprecedented synthetic route represents a sweet achievement to cover further lead-like chemical space.
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Affiliation(s)
- Johann Leblanc
- Nantes Université, CNRS, CEISAM, UMR 6230, 2 rue de la Houssinière, BP 92208, F-44000 Nantes, France.
| | - Margaux Boutin
- Nantes Université, CNRS, CEISAM, UMR 6230, 2 rue de la Houssinière, BP 92208, F-44000 Nantes, France.
| | - Clara Vega
- Nantes Université, CNRS, CEISAM, UMR 6230, 2 rue de la Houssinière, BP 92208, F-44000 Nantes, France.
| | - Monique Mathé-Allainmat
- Nantes Université, CNRS, CEISAM, UMR 6230, 2 rue de la Houssinière, BP 92208, F-44000 Nantes, France.
| | - Sandrine Grosse
- Janssen Research & Development, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Jérôme Guillemont
- NovAliX on-site Janssen-Cilag, Centre de recherche Pharma, Campus de Maigremont BP615, F-27106 Val de Reuil Cedex, France
| | - Jacques Lebreton
- Nantes Université, CNRS, CEISAM, UMR 6230, 2 rue de la Houssinière, BP 92208, F-44000 Nantes, France.
| | - Arnaud Tessier
- Nantes Université, CNRS, CEISAM, UMR 6230, 2 rue de la Houssinière, BP 92208, F-44000 Nantes, France.
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3
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Rani S, Aslam S, Lal K, Noreen S, Alsader KAM, Hussain R, Shirinfar B, Ahmed N. Electrochemical C-H/C-C Bond Oxygenation: A Potential Technology for Plastic Depolymerization. CHEM REC 2024; 24:e202300331. [PMID: 38063812 DOI: 10.1002/tcr.202300331] [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: 10/27/2023] [Revised: 11/23/2023] [Indexed: 03/10/2024]
Abstract
Herein, we provide eco-friendly and safely operated electrocatalytic methods for the selective oxidation directly or with water, air, light, metal catalyst or other mediators serving as the only oxygen supply. Heavy metals, stoichiometric chemical oxidants, or harsh conditions were drawbacks of earlier oxidative cleavage techniques. It has recently come to light that a crucial stage in the deconstruction of plastic waste and the utilization of biomass is the selective activation of inert C(sp3 )-C/H(sp3 ) bonds, which continues to be a significant obstacle in the chemical upcycling of resistant polyolefin waste. An appealing alternative to chemical oxidations using oxygen and catalysts is direct or indirect electrochemical conversion. An essential transition in the chemical and pharmaceutical industries is the electrochemical oxidation of C-H/C-C bonds. In this review, we discuss cutting-edge approaches to chemically recycle commercial plastics and feasible C-C/C-H bonds oxygenation routes for industrial scale-up.
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Affiliation(s)
- Sadia Rani
- Department of Chemistry, The Women University Multan, Multan, 60000, Pakistan
| | - Samina Aslam
- Department of Chemistry, The Women University Multan, Multan, 60000, Pakistan
| | - Kiran Lal
- Department of Chemistry, The Women University Multan, Multan, 60000, Pakistan
| | - Sobia Noreen
- Institute of Chemistry, University of Sargodha, Sargodha, 40100, Pakistan
| | | | - Riaz Hussain
- Department of Chemistry, University of Education Lahore, D.G. Khan Campus, 32200, Pakistan
| | - Bahareh Shirinfar
- West Herts College - University of Hertfordshire, Watford, WD17 3EZ, London, United Kingdom
| | - Nisar Ahmed
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
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4
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Mohammadikia P, Ramezanpour S, Shiri P, Dehaen W, Achten L. A Highly Efficient Strategy for One-Pot and Pseudo-Six-Component Synthesis of Hexahydroquinolines. ACS OMEGA 2024; 9:4466-4473. [PMID: 38313473 PMCID: PMC10832005 DOI: 10.1021/acsomega.3c06264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/24/2023] [Accepted: 12/25/2023] [Indexed: 02/06/2024]
Abstract
In this study, a homogeneous acid-catalyzed reaction of a series of benzaldehydes, benzylamines, and Meldrum's acid was presented, allowing the novel one-pot and multicomponent synthesis of hexahydroquinolines with high stereoselectivity. The current strategy has advantages including high regioselectivity, good efficiency, reasonable diversity, utilization of an inexpensive and safe catalyst, and easy purification of products by simple recrystallization. The current reaction utilizes 2 equiv of Meldrum's acid, 3 equiv of benzaldehyde derivatives, and one equiv of amine derivatives to yield (4'S,5'S,7'S)-1'-benzyl-2,2-dimethyl-4',5',7'-triphenyl-3',4',7',8'-tetrahydro-1'H-spiro[[1,3]dioxane-5,6'-quinoline]-2',4,6(5'H)-trione derivatives.
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Affiliation(s)
- Parvin Mohammadikia
- Department
of Chemistry, K. N. Toosi University of
Technology, P.O. Box
15875-4416, Tehran 19697, Iran
| | - Sorour Ramezanpour
- Department
of Chemistry, K. N. Toosi University of
Technology, P.O. Box
15875-4416, Tehran 19697, Iran
| | - Pezhman Shiri
- Department
of Chemistry, K. N. Toosi University of
Technology, P.O. Box
15875-4416, Tehran 19697, Iran
| | - Wim Dehaen
- Molecular
Design and Synthesis, Department of Chemistry, KU Leuven, Leuven 3000, Belgium
| | - Linde Achten
- Molecular
Design and Synthesis, Department of Chemistry, KU Leuven, Leuven 3000, Belgium
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5
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Long N, Le Gresley A, Wozniak A, Brough S, Wren SP. Synthesis and evaluation of druglike parameters via in silico techniques for a series of heterocyclic monosquarate-amide derivatives as potential carboxylic acid bioisosteres. Bioorg Med Chem 2024; 98:117565. [PMID: 38142561 DOI: 10.1016/j.bmc.2023.117565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/20/2023] [Accepted: 12/18/2023] [Indexed: 12/26/2023]
Abstract
Herein, we present a synthetic compound library comprising of 13 structurally diverse heterocyclic monosquarate-amide derivatives. The compounds featured in this library were designed as potential bioisosteric replacements carboxylic acid moiety's. A good selection of the compounds presented exhibit unique molecular architecture and have shown promising results following in silico evaluation of 'druglike properties' using Swiss ADME. The research presented in this work focuses on the preparation of derivatives of 3,4-dihydroxycyclobut-3-ene-1,2-dione, a known carboxylic acid bioisostere.
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Affiliation(s)
- N Long
- School of Life Sciences, Pharmacy and Chemistry, Faculty of Health, Science, Social Care and Education, Kingston University London, Penrhyn Road, Kingston, Surrey KT1 2EE, United Kingdom.
| | - A Le Gresley
- School of Life Sciences, Pharmacy and Chemistry, Faculty of Health, Science, Social Care and Education, Kingston University London, Penrhyn Road, Kingston, Surrey KT1 2EE, United Kingdom
| | - A Wozniak
- Asynt, Unit 29 Hall Barn Road Industrial Estate, Isleham, Cambridgeshire CB7 5RJ, United Kingdom
| | - S Brough
- Key Organics Ltd, Highfield Road Industrial Estate Camelford, Cornwall PL32 9RA, United Kingdom
| | - S P Wren
- School of Life Sciences, Pharmacy and Chemistry, Faculty of Health, Science, Social Care and Education, Kingston University London, Penrhyn Road, Kingston, Surrey KT1 2EE, United Kingdom.
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6
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Tiwari G, Mishra VK, Kumari P, Khanna A, Sharma S, Sagar R. Synthesis of triazole bridged N-glycosides of pyrazolo[1,5- a]pyrimidinones as anticancer agents and their in silico docking studies. RSC Adv 2024; 14:1304-1315. [PMID: 38174229 PMCID: PMC10762718 DOI: 10.1039/d3ra06993a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024] Open
Abstract
In the pursuit of novel therapeutic agents, we present a comprehensive study on the design, synthesis, and evaluation of a diverse library of triazole bridged N-glycosides of pyrazolo[1,5-a]pyrimidinones, employing a microwave-assisted synthetic approach via 'click chemistry'. This methodology offers efficient and accelerated access to the glycohybrids, showcasing improved reaction conditions that yield high-quality products. In this research endeavor, we have successfully synthesized a series of twenty-seven triazole bridged N-glycosides of pyrazolo[1,5-a]pyrimidinones. Our investigation extends beyond synthetic endeavors to explore the potential therapeutic relevance of these compounds. We subjected them to rigorous in vitro screening against prominent breast cancer cell lines MCF-7, MDA-MB231, and MDA-MB453. Among the library of compounds synthesized, (2S,3S,4R,5S,6S)-2-(acetoxymethyl)-6-(4-((5-(4-methoxyphenyl)-7-oxopyrazolo[1,5-a]pyrimidin-1(7H)-yl)methyl)-1H-1,2,3-triazol-1-yl)tetrahydro-2H-pyran-3,4,5-triyl triacetate emerged as a potent compound, exhibiting remarkable anti-cancer activity with an IC50 value of 27.66 μM against the MDA-MB231 cell line. Additionally, (2S,3R,4R,5S,6S)-2-(acetoxymethyl)-6-(4-((7-oxo-5-(4-(trifluoromethyl)phenyl)pyrazolo[1,5-a]pyrimidin-1(7H)-yl)methyl)-1H-1,2,3-triazol-1-yl)tetrahydro-2H-pyran-3,4,5-triyl triacetate displayed notable inhibitory potential against the MCF-7 cell line, with an IC50 value of 4.93 μM. Furthermore, in silico docking analysis was performed to validate our experimental findings. These findings underscore the promise of our triazole bridged N-glycosides of pyrazolo[1,5-a]pyrimidinones as potential anti-cancer agents. This research not only enriches the field of glycohybrid synthesis but also contributes valuable insights into the development of novel anti-cancer therapeutics.
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Affiliation(s)
- Ghanshyam Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi 221005 India
| | - Vinay Kumar Mishra
- Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi 221005 India
| | - Priti Kumari
- Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi 221005 India
| | - Ashish Khanna
- Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi 221005 India
| | - Sunil Sharma
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University New Delhi 110067 India
| | - Ram Sagar
- Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi 221005 India
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University New Delhi 110067 India
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7
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Wang YJ, Zhao LM. Synthesis of 10-Membered Azecines through Pd-Catalyzed Formal [6+4] Cycloaddition and Their Transannular Reaction to Polycyclic Compounds. Chemistry 2023; 29:e202302111. [PMID: 37776147 DOI: 10.1002/chem.202302111] [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: 07/05/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 10/01/2023]
Abstract
Azecine fragments are frequently presented in natural products and bioactive compounds. However, minor efforts have been devoted to these 10-membered N-heterocycles, and their synthesis is still challenging. Reported herein is the first catalytic formal [6+4] cycloaddition for the synthesis of 10-membered azecines. Under palladium catalysis, the reaction of δ-vinylvalerolactones and benzofuran-derived azadienes proceeds smoothly to afford benzofuran-fused azecines with high diastereoselectivity in moderate to good yields. A unique transannular reaction of these 10-membered azecines for the construction of polycyclic compounds is also demonstrated.
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Affiliation(s)
- Yu-Jiao Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
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8
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Biesen L, Müller TJJ. Aroyl-S,N-Ketene Acetals: Luminous Renaissance of a Class of Heterocyclic Compounds. Chemistry 2023; 29:e202302067. [PMID: 37638792 DOI: 10.1002/chem.202302067] [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: 06/29/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 08/29/2023]
Abstract
Aroyl-S,N-ketene acetals represent a peculiar class of heterocyclic merocyanines, compounds bearing pronounced and rather short dipoles with great push-pull characteristics that define their rich properties. They are accessible via a wide array of synthetic concepts and procedures, ranging from addition-elimination and condensation procedures up to rearrangement and metal-mediated reactions. With our work from 2020, aroyl-S,N-ketene acetals have been identified as powerful and promising dyes with pronounced and vastly tunable solid-state emission and aggregation-induced emission properties. One characteristic trademark of this class of dye molecules is the level of control that could be exerted, and which was thoroughly explored. Based on these results, the field was opened to extend the system to bi- and multichromophoric systems by the full toolkit of synthetic organic chemistry thus giving access to even more exciting properties and manifolded substance libraries capitalizing on the AIE properties. This review aims at outlining the reaction-based principles that allow for a swift and facile access to aroyl-S,N-ketene acetals, their methodical and structural evolution and the plethora of fluorescence and aggregation properties.
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Affiliation(s)
- Lukas Biesen
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Thomas J J Müller
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
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9
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Teixeira WKO, de Albuquerque DY, Zukerman-Schpector J, Seckler D, Rampon DS, Schwab RS. Copper-Mediated Intramolecular Interrupted CuAAC Selanylation. J Org Chem 2023. [PMID: 37467464 DOI: 10.1021/acs.joc.2c02893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
We, herein, describe a copper-mediated domino CuAAC intramolecular selanylation for the synthesis of unprecedented fused benzo[4,5][1,3]selenazolo[3,2-c][1,2,3]triazoles from 1,2-bis(2-azidoaryl)diselenides and terminal alkynes under microwave irradiation. This is the seminal method for the synthesis of these fused heterocycles, and it proceeds under mild conditions, tolerates several functional groups, and can be carried out using environmentally benign solvents such as dimethyl carbonate. This transformation has been successfully extended to TMS-protected alkynes and to bioactive alkynes. A plausible reaction mechanism is proposed based on several control experiments and previous reports.
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Affiliation(s)
- Wystan K O Teixeira
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Departamento de Química, Universidade Federal de São Carlos - UFSCar, Rodovia Washington Luís, km 235 - SP-310, São Carlos 13565-905, São Paulo, Brazil
| | - Danilo Yano de Albuquerque
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Departamento de Química, Universidade Federal de São Carlos - UFSCar, Rodovia Washington Luís, km 235 - SP-310, São Carlos 13565-905, São Paulo, Brazil
| | - Julio Zukerman-Schpector
- Departamento de Química, Universidade Federal de São Carlos - UFSCar, Rodovia Washington Luís, km 235 - SP-310, São Carlos 13565-905, São Paulo, Brazil
| | - Diego Seckler
- Laboratory of Polymers and Catalysis (LaPoCa), Departamento de Química, Universidade Federal do Paraná - UFPR, P. O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Daniel S Rampon
- Laboratory of Polymers and Catalysis (LaPoCa), Departamento de Química, Universidade Federal do Paraná - UFPR, P. O. Box 19061, Curitiba 81531-980, Paraná, Brazil
| | - Ricardo S Schwab
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Departamento de Química, Universidade Federal de São Carlos - UFSCar, Rodovia Washington Luís, km 235 - SP-310, São Carlos 13565-905, São Paulo, Brazil
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10
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Majee S, Sarav M, Banik BK, Ray D. Recent Advances in the Green Synthesis of Active N-Heterocycles and Their Biological Activities. Pharmaceuticals (Basel) 2023; 16:873. [PMID: 37375820 DOI: 10.3390/ph16060873] [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: 05/15/2023] [Revised: 06/06/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
N-heterocyclic scaffolds represent a privileged architecture in the process of drug design and development. It has widespread occurrence in synthetic and natural products, either those that are established or progressing as potent drug candidates. Additionally, numerous novel N-heterocyclic analogues with remarkable physiological significance and extended pharmaceutical applications are escalating progressively. Hence, the classical synthetic protocols need to be improvised according to modern requirements for efficient and eco-friendly approaches. Numerous methodologies and technologies emerged to address the green and sustainable production of various pharmaceutically and medicinally important N-heterocyclic compounds in last few years. In this context, the current review unveils greener alternatives for direct access to categorically differentiated N-heterocyclic derivatives and its application in the establishment of biologically active potent molecules for drug design. The green and sustainable methods accentuated in this review includes microwave-assisted reactions, solvent-free approaches, heterogeneous catalysis, ultrasound reactions, and biocatalysis.
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Affiliation(s)
- Suman Majee
- Amity Institute of Click Chemistry Research and Studies, Amity University, Sector 125, Noida 201313, Uttar Pradesh, India
- Amity Institute of Biotechnology, Amity University, Sector 125, Noida 201313, Uttar Pradesh, India
| | - Mansi Sarav
- Amity Institute of Biotechnology, Amity University, Sector 125, Noida 201313, Uttar Pradesh, India
| | - Bimal Krishna Banik
- Department of Mathematics and Natural Sciences, College of Sciences and Human Studies, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
| | - Devalina Ray
- Amity Institute of Click Chemistry Research and Studies, Amity University, Sector 125, Noida 201313, Uttar Pradesh, India
- Amity Institute of Biotechnology, Amity University, Sector 125, Noida 201313, Uttar Pradesh, India
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11
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McGettigan JE, Ready JM. Diastereoselective Alkylation of Activated Nitrogen Heterocycles with Alkenyl Boronate Complexes. Angew Chem Int Ed Engl 2023; 62:e202216961. [PMID: 36780188 PMCID: PMC10073296 DOI: 10.1002/anie.202216961] [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: 11/18/2022] [Revised: 02/11/2023] [Accepted: 02/13/2023] [Indexed: 02/14/2023]
Abstract
Alkenyl boronate complexes react with acylated quinolines and isoquinolines via 1,2-metalate rearrangement to give alkylated, dearomatized heterocycles in good yields, diastereoselectivities, and regioselectivities. This multi-component coupling is highly modular and can be used to access a wide scope of heterocyclic scaffolds. Chiral boronic esters made through this methodology possess high synthetic potential and can be transformed into various functional groups in one step without racemization.
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Affiliation(s)
- James E McGettigan
- Department of Biochemistry, Division of Chemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-0938, USA
| | - Joseph M Ready
- Department of Biochemistry, Division of Chemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-0938, USA
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12
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Uppalabat T, Hassa N, Sawektreeratana N, Leowanawat P, Janthakit P, Nalaoh P, Promarak V, Soorukram D, Reutrakul V, Kuhakarn C. Cascade Oxidative Trifluoromethylthiolation and Cyclization of 3-Alkyl-1-(2-(alkynyl)phenyl)indoles. J Org Chem 2023; 88:5403-5419. [PMID: 37019432 DOI: 10.1021/acs.joc.2c03045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Persulfate-promoted radical cascade trifluoromethylthiolation and cyclization of 3-alkyl-1-(2-(alkynyl)phenyl)indoles with AgSCF3 were investigated. This protocol provides a novel route to CF3S-substituted indolo[1,2-a]quinoline-7-carbaldehydes and CF3S-substituted indolo[1,2-a]quinoline-7-methanone derivatives via the formation of the C-SCF3 bond and C-C bond and benzylic carbon oxidation in a single step. This reaction can accommodate a broad range of functional groups. The single-crystal X-ray diffraction data confirm the chemical structure of the product. A scale-up experiment and radical inhibition experiments were operated in the reaction system. Photophysical properties of some selected 5-((trifluoromethyl)thio)indolo[1,2-a]quinoline-7-carbaldehydes were studied by UV-visible and fluorescence spectroscopy.
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Affiliation(s)
- Thikhamporn Uppalabat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Nattawoot Hassa
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Natthapat Sawektreeratana
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Pawaret Leowanawat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Pattarapapa Janthakit
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
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13
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Gök Y, Taslimi P, Şen B, Bal S, Aktaş A, Aygün M, Sadeghi M, Gülçin İ. Design, Synthesis, Characterization, Crystal Structure, In silico Studies, and Inhibitory Properties of the PEPPSI Type Pd(II)NHC Complexes Bearing Chloro/Fluorobenzyl Group. Bioorg Chem 2023; 135:106513. [PMID: 37030104 DOI: 10.1016/j.bioorg.2023.106513] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/26/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023]
Abstract
This work contains synthesis, characterization, crystal structure, and biological activity of a new series of the PEPPSI type Pd(II)NHC complexes [(NHC)Pd(II)(3-Cl-py)]. NMR, FTIR, and elemental analysis techniques were used to characterize all (NHC)Pd(II)(3-Cl-py) complexes. Also, molecular and crystal structures of complex 1c were established by single-crystal X-ray diffraction. Regarding the X-ray studies, the palladium(II) atom has a slightly distorted square-planar coordination environment. Additionally, the enzyme inhibitory effect of new (NHC)Pd(II)(3-Cl-py) complexes (1a-1g) was studied. They exhibited highly potent inhibition effect on acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and carbonic anhydrases (hCAs) (Ki values are in the range of 0.08 ± 0.01 to 0.65 ± 0.06 µM, 10.43 ± 0.98 to 22.48 ± 2.01 µM, 6.58 ± 0.30 to 10.88 ± 1.01 µM and 6.34 ± 0.37 to 9.02 ± 0.72 µM for AChE, BChE, hCA I, and hCA II, respectively). Based on the molecular docking, among the seven synthesized complexes, 1c, 1b, 1e, and 1a significantly inhibited AChE, BChE, hCA I, and hCA II enzymes, respectively. The findings highpoint that (NHC)Pd(II)(3-Cl-py) complexes can be considered as possible inhibitors via metabolic enzyme inhibition.
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14
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Egbujor MC, Tucci P, Onyeije UC, Emeruwa CN, Saso L. NRF2 Activation by Nitrogen Heterocycles: A Review. Molecules 2023; 28:molecules28062751. [PMID: 36985723 PMCID: PMC10058096 DOI: 10.3390/molecules28062751] [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: 01/23/2023] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Several nitrogen heterocyclic analogues have been applied to clinical practice, and about 75% of drugs approved by the FDA contain at least a heterocyclic moiety. Thus, nitrogen heterocycles are beneficial scaffolds that occupy a central position in the development of new drugs. The fact that certain nitrogen heterocyclic compounds significantly activate the NRF2/ARE signaling pathway and upregulate the expression of NRF2-dependent genes, especially HO-1 and NQO1, underscores the need to study the roles and pharmacological effects of N-based heterocyclic moieties in NRF2 activation. Furthermore, nitrogen heterocycles exhibit significant antioxidant and anti-inflammatory activities. NRF2-activating molecules have been of tremendous research interest in recent times due to their therapeutic roles in neuroinflammation and oxidative stress-mediated diseases. A comprehensive review of the NRF2-inducing activities of N-based heterocycles and their derivatives will broaden their therapeutic prospects in a wide range of diseases. Thus, the present review, as the first of its kind, provides an overview of the roles and effects of nitrogen heterocyclic moieties in the activation of the NRF2 signaling pathway underpinning their antioxidant and anti-inflammatory actions in several diseases, their pharmacological properties and structural-activity relationship are also discussed with the aim of making new discoveries that will stimulate innovative research in this area.
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Affiliation(s)
- Melford C Egbujor
- Department of Chemical Sciences, Rhema University Nigeria, Aba 453115, Nigeria
| | - Paolo Tucci
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy
| | - Ugomma C Onyeije
- Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka 420007, Nigeria
| | - Chigbundu N Emeruwa
- Department of Chemical Sciences, Rhema University Nigeria, Aba 453115, Nigeria
| | - Luciano Saso
- Department of Physiology and Pharmacology, Vittorio Erspamer, Sapienza University of Rome, 00161 Rome, Italy
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15
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Pinter EN, Sheldon ZS, Modak A, Cook SP. Fluorosulfonamide-Directed Heteroarylation of Aliphatic C(sp 3)-H Bonds. J Org Chem 2023; 88:4757-4760. [PMID: 36912807 DOI: 10.1021/acs.joc.2c02461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Herein, we describe a formal dehydrogenative cross coupling of heterocycles with unactivated aliphatic amines. The resulting transformation enables the direct alkylation of common heterocycles by merging N-F-directed 1,5-HAT with Minisci chemistry, leading to predictable site selectivity. The reaction provides a direct route for the transformation of simple alkyl amines to value-added products under mild reaction conditions, making this an attractive option for C(sp3)-H heteroarylation.
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Affiliation(s)
- Emily N Pinter
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
| | - Zachary S Sheldon
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
| | - Atanu Modak
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
| | - Silas P Cook
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
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16
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Borah B, Patat M, Singh V, Sivaprakash M, Prasad MS, Chowhan LR. Visible-light-induced organophotocatalytic and singlet oxygen-initiated domino construction of 1,4-dihydropyridines, C-3 functionalized spiro[indoline-3,4'-pyridines] and C-11 functionalized spiro[indeno-[1,2- b]quinoxaline-11,4'-pyridines]. Org Biomol Chem 2023; 21:1518-1530. [PMID: 36695344 DOI: 10.1039/d3ob00043e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A highly efficient pot, atom, and step economical method for the construction of pharmacologically potent structurally functionalized 1,4-dihydropyridines, quaternary centered C-3 functionalized spiro[indoline-3,4'-pyridines], and C-11 functionalized spiro[indeno[1,2-b]quinoxaline-11,4'-pyridines] via rose bengal photoredox catalysis under blue LED irradiation in an aqueous medium at room temperature has been developed. The products were isolated in excellent yields within a short reaction time for a variety of functional groups under transition metal- and ligand-free energy-efficient conditions in a green solvent system with high reaction mass efficiency and process mass intensity, which are the key advantages of the current work.
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Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat, Gandhinagar-382030, India.
| | - Mihir Patat
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat, Gandhinagar-382030, India.
| | - Vipin Singh
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat, Gandhinagar-382030, India.
| | - Murugesan Sivaprakash
- Asymmetric Synthesis and Catalysis Laboratory, Department of Chemistry, Central University of Tamil Nadu (CUTN), Tiruvarur-610 005, India
| | - Madavi S Prasad
- Asymmetric Synthesis and Catalysis Laboratory, Department of Chemistry, Central University of Tamil Nadu (CUTN), Tiruvarur-610 005, India
| | - L Raju Chowhan
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat, Gandhinagar-382030, India.
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17
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Mishra P, Shruti I, Kant R, Thakur TS, Kumar A, Rastogi N. Visible Light Organo‐Photocatalytic Synthesis of 3‐Imidazolines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Poornima Mishra
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road 226 031 Lucknow India
- Academy of Scientific and Innovative Research (AcSIR) 201002 Ghaziabad India
| | - Ipsha Shruti
- Biochemistry & Structural Biology Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road 226031 Lucknow India
| | - Ruchir Kant
- Biochemistry & Structural Biology Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road 226031 Lucknow India
| | - Tejender S. Thakur
- Academy of Scientific and Innovative Research (AcSIR) 201002 Ghaziabad India
- Biochemistry & Structural Biology Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road 226031 Lucknow India
| | - Akhilesh Kumar
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road 226 031 Lucknow India
- Academy of Scientific and Innovative Research (AcSIR) 201002 Ghaziabad India
| | - Namrata Rastogi
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road 226 031 Lucknow India
- Academy of Scientific and Innovative Research (AcSIR) 201002 Ghaziabad India
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18
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Synthetic Pathways to Pyrido[3,4-c]pyridazines and Their Polycyclic Derivatives. ORGANICS 2022. [DOI: 10.3390/org3040028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Pyrido[3,4-c]pyridazines are nitrogen-containing scaffolds that have been described as being promising in medicinal chemistry, but they are rather rare chemicals. In this review article, the literature on synthetic pathways towards pyrido[3,4-c]pyridazines is listed exhaustively, first with the bicyclic systems themselves that are obtained starting either from pyridines, pyridazines or other heterocycles. Then, the reports on the related tricyclic derivatives are discussed, again according to the source heterocycle, and finally we mention some examples on polycyclic systems.
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19
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Norman JP, Neufeldt SR. The Road Less Traveled: Unconventional Site Selectivity in Palladium-Catalyzed Cross-Couplings of Dihalogenated N-Heteroarenes. ACS Catal 2022; 12:12014-12026. [PMID: 36741273 PMCID: PMC9894105 DOI: 10.1021/acscatal.2c03743] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The vast majority (≥90%) of literature reports agree on the regiochemical outcomes of Pd-catalyzed cross-coupling reactions for most classes of dihalogenated N-heteroarenes. Despite a well-established mechanistic rationale for typical selectivity, several examples reveal that changes to the catalyst can switch site selectivity, leading to the unconventional product. In this Perspective, we survey these unusual cases in which divergent selectivity is controlled by ligands or catalyst speciation. In some cases, the mechanistic origin of inverted selectivity has been established, but in others the mechanism remains unknown. This Perspective concludes with a discussion of remaining challenges and opportunities for the field of site-selective cross-coupling. These include developing a better understanding of oxidative addition mechanisms, understanding the role of catalyst speciation on selectivity, establishing an explanation for the influence of ring substituents on regiochemical outcome, inverting selectivity for some "stubborn" classes of substrates, and minimizing unwanted over-reaction of di- and polyhalogenated substrates.
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Affiliation(s)
- Jacob P. Norman
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Sharon R. Neufeldt
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
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20
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Richardson SM, Marchetti PM, Herrera MA, Campopiano DJ. Coupled Natural Fusion Enzymes in a Novel Biocatalytic Cascade Convert Fatty Acids to Amines. ACS Catal 2022; 12:12701-12710. [PMID: 36313522 PMCID: PMC9594044 DOI: 10.1021/acscatal.2c02954] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/29/2022] [Indexed: 11/28/2022]
Abstract
![]()
Tambjamine YP1 is a pyrrole-containing natural product.
Analysis
of the enzymes encoded in the Pseudoalteromonas tunicata “tam” biosynthetic gene cluster (BGC)
identified a unique di-domain biocatalyst (PtTamH).
Sequence and bioinformatic analysis predicts that PtTamH comprises an N-terminal, pyridoxal 5′-phosphate (PLP)-dependent
transaminase (TA) domain fused to a NADH-dependent C-terminal thioester
reductase (TR) domain. Spectroscopic and chemical analysis revealed
that the TA domain binds PLP, utilizes l-Glu as an amine
donor, accepts a range of fatty aldehydes (C7–C14 with a preference for C12), and produces the
corresponding amines. The previously characterized PtTamA from the “tam” BGC is an ATP-dependent, di-domain
enzyme comprising a class I adenylation domain fused to an acyl carrier
protein (ACP). Since recombinant PtTamA catalyzes
the activation and thioesterification of C12 acid to the holo-ACP domain, we hypothesized that C12 ACP
is the natural substrate for PtTamH. PtTamA and PtTamH were successfully coupled together
in a biocatalytic cascade that converts fatty acids (FAs) to amines
in one pot. Moreover, a structural model of PtTamH
provides insights into how the TA and TR domains are organized. This
work not only characterizes the formation of the tambjamine YP1 tail
but also suggests that PtTamA and PtTamH could be useful biocatalysts for FA to amine functional group
conversion.
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Affiliation(s)
- Shona M. Richardson
- School of Chemistry, The University of Edinburgh, David Brewster Road, EdinburghEH9 3FJ, U.K
| | - Piera M. Marchetti
- School of Chemistry, The University of Edinburgh, David Brewster Road, EdinburghEH9 3FJ, U.K
| | - Michael A. Herrera
- School of Chemistry, The University of Edinburgh, David Brewster Road, EdinburghEH9 3FJ, U.K
| | - Dominic J. Campopiano
- School of Chemistry, The University of Edinburgh, David Brewster Road, EdinburghEH9 3FJ, U.K
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21
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Obaid RJ, Mughal EU, Naeem N, Al-Rooqi MM, Sadiq A, Jassas RS, Moussa Z, Ahmed SA. Pharmacological significance of nitrogen-containing five and six-membered heterocyclic scaffolds as potent cholinesterase inhibitors for drug discovery. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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22
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Şahin N, Çelebi MS, Ayvaz MÇ, Üstün E. Antioxidant Activity, Enzyme Inhibition, Electrochemical and Theoretical Evaluation of Novel PEPPSI Type N-Heterocyclic Carbene Complexes. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Choudhary D, Garg S, Kaur M, Sohal HS, Malhi DS, Kaur L, Verma M, Sharma A, Mutreja V. Advances in the Synthesis and Bio-Applications of Pyrazine Derivatives: A Review. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2092873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Dimple Choudhary
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Sonali Garg
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Manvinder Kaur
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Harvinder Singh Sohal
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Dharambeer Singh Malhi
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Loveleen Kaur
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Meenakshi Verma
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Ajay Sharma
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Vishal Mutreja
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
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24
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Schiwek C, Stegbauer S, Pickl T, Bach T. Rhodium(CAAC)‐Catalyzed Arene Hydrogenation of Benzo‐fused N‐Heterocycles to Saturated Building Blocks with an all‐cis Configuration. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Synthesis, anti-cancer activity and molecular docking studies of new nicotinamide containing EP4 antagonists. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Moreira NM, dos Santos JRN, Correa A. Greener Synthesis of Pyrroloquinazoline Derivatives: Recent Advances. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Natália Menezes Moreira
- Federal University of Sao Carlos: Universidade Federal de Sao Carlos Chemistry Rodovia Washington Luis km 235 13565-905 São Carlos BRAZIL
| | - Jhonathan Renner Nunes dos Santos
- Federal University of Sao Carlos Sciences and Technology Centre: Universidade Federal de Sao Carlos Centro de Ciencias Exatas e de Tecnologia Chemistry Rodovia Washington Luis km 235 13565-905 São Carlos BRAZIL
| | - Arlene Correa
- Federal University of São Carlos Chemistry Via Washington Luis km 235 13565-905 São Carlos BRAZIL
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27
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N E ASWATHIRAVINDRAN, Sindhuja D, Bhuvanesh N, Karvembu R. Synthesis of 1,2‐disubstituted benzimidazoles via acceptorless dehydrogenative coupling using Ru(II)‐arene catalysts containing ferrocene thiosemicarbazone. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- ASWATHI RAVINDRAN N E
- National Institute of Technology Tiruchirappalli Chemistry 620015 Tiruchirappalli INDIA
| | | | - Nattamai Bhuvanesh
- Texas A&M University College Station: Texas A&M University Chemistry INDIA
| | - R Karvembu
- National Institute of Technology Department of Chemistry Tanjore Road 620015 Tiruchirappalli INDIA
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28
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Isoquinolinedione-urea hybrids: Synthesis, antibacterial evaluation, drug-likeness, molecular docking and DFT studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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29
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White LED Light-Mediated Eosin Y-Photocatalyzed One-Pot Synthesis of Novel 1,2,4-Triazol-3-Amines By Sequential Addition. Top Catal 2022. [DOI: 10.1007/s11244-022-01590-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Tomar R, Bhattacharya D, Arulananda Babu S. Direct lactamization of β‐arylated δ‐aminopentanoic acid carboxamides: En route to 4‐aryl‐ 2‐piperidones, piperidines, antituberculosis molecule Q203 (Telacebec) and its analogues. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100736] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Radha Tomar
- Indian Institute of Science Education and Research Mohali Chemical Sciences INDIA
| | | | - Srinivasarao Arulananda Babu
- Indian Institute of Science Education and Research Mohali Department of Chemical Sciences Knowledge City, Sector 81, SAS Nagar,Mohali, Manauli P.O., 140306 Mohali INDIA
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31
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Wang L, Xie L, Fang Z, Zhang Q, Li D. Tandem trifluoromethylthiolation and cyclization of N-aryl-3-butenamides with AgSCF 3: divergent access to CF 3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones. Org Chem Front 2022. [DOI: 10.1039/d2qo00207h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A AgSCF3-mediated tandem trifluoromethylthiolaton and cyclization of N-aryl-3-butenamides was developed. It showed divergent reactivities and enabled the selective syntheses of CF3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones. The selectivity was achieved through different...
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32
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Robert EGL, Le Du E, Waser J. Synthesis of Polycyclic Aminal Heterocycles via Decarboxylative Cyclisation of Dipeptide Derivatives. Chem Commun (Camb) 2022; 58:3473-3476. [DOI: 10.1039/d2cc00167e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oxidative-decarboxylative intramolecular cyclisation of dipeptide derivatives is reported. This transformation is promoted by phenyl iodine (III) diacetate (PIDA) in combination with BF3·OEt2. The reaction gives access to a variety...
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33
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Gunasekar R, Goodyear RL, Silvestri IP, Xiao J. Recent Developments in Enantio- and Diastereoselective Hydrogenation of N-Heteroaromatic Compounds. Org Biomol Chem 2022; 20:1794-1827. [DOI: 10.1039/d1ob02331d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enantioselective and diastereoselective hydrogenation of N-heteroaromatic compounds is an efficient strategy to access chirally enriched cyclic heterocycles, which often possess highly bio-active properties. This strategy, however, has only been...
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34
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Liu C, Liu Q. Earth-Abundant Metal-Catalyzed Asymmetric Hydrogenation of Carbon-Nitrogen Unsaturated Bonds. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202208003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Discovery of a 2,4-diphenyl-5,6-dihydrobenzo(h)quinolin-8-amine derivative as a novel DNA intercalating topoisomerase IIα poison. Eur J Med Chem 2021; 226:113860. [PMID: 34597897 DOI: 10.1016/j.ejmech.2021.113860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/04/2021] [Accepted: 09/17/2021] [Indexed: 12/22/2022]
Abstract
Several anticancer agents have been developed and innovative approaches have been made toward cancer type-specific medicines for cancer treatment. As a continuous effort to develop potential chemotherapeutic agents, a novel series of 2,4-diphenyl-5,6-dihydrobenzo(h)quinolin-8-amines containing amino groups, hydroxyphenyl and fluorine functionalities were designed and synthesized. The compounds were evaluated for topo IIα inhibitory and cytotoxicity against HCT15, and HeLa human cancer cell lines. Among synthesized thirty compounds, the majority exhibited strong topo IIα inhibition and anti-proliferation against HCT15 colorectal adenocarcinoma cell line. The structure-activity relationship study revealed that compounds with -CF3 and -OCF3 substituents at 4- position and 3' or 4'-hydroxyphenyl at 2-position attached to the central pyridine ring displayed potent topo IIα and anti-proliferative activity in colorectal and cervix cancer cell line. In vitro studies provided the evidence that compounds 16, 19, 22, and 28 possess excellent topo IIα inhibition and antiproliferative activity. For a better understanding, topo IIα cleavage complex, EtBr displacement, KI quenching assays and molecular docking of compound 19 was performed and the results revealed the mode of action as a DNA intercalative topo IIα poison inhibitor. The results obtained from this study provide insight into the DNA binding mechanism of 2,4-diphenyl-5,6-dihydrobenzo(h)quinolin-8-amines and alteration in topo IIα inhibitory and antiproliferative activity with modifications in the rigid structure.
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36
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de Araújo-Neto JB, da Silva MMC, Oliveira-Tintino CDDM, Begnini IM, Rebelo RA, da Silva LE, Mireski SL, Nasato MC, Krautler MIL, Ribeiro-Filho J, Siyadatpanah A, Wilairatana P, Coutinho HDM, Tintino SR. Enhancement of Antibiotic Activity by 1,8-Naphthyridine Derivatives against Multi-Resistant Bacterial Strains. Molecules 2021; 26:7400. [PMID: 34885981 PMCID: PMC8659213 DOI: 10.3390/molecules26237400] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/02/2021] [Accepted: 12/04/2021] [Indexed: 11/24/2022] Open
Abstract
The search for new antibacterial agents has become urgent due to the exponential growth of bacterial resistance to antibiotics. Nitrogen-containing heterocycles such as 1,8-naphthyridine derivatives have been shown to have excellent antimicrobial properties. Therefore, the purpose of this study was to evaluate the antibacterial and antibiotic-modulating activities of 1,8-naphthyridine derivatives against multi-resistant bacterial strains. The broth microdilution method was used to determine the minimum inhibitory concentration (MIC) of the following compounds: 7-acetamido-1,8-naphthyridin-4(1H)-one and 3-trifluoromethyl-N-(5-chloro-1,8-naphthyridin-2-yl)-benzenesulfonamide. The antibiotic-modulating activity was analyzed using subinhibitory concentrations (MIC/8) of these compounds in combination with norfloxacin, ofloxacin, and lomefloxacin. Multi-resistant strains of Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were used in both tests. Although the compounds had no direct antibacterial activity (MIC ≥ 1.024 µg/mL), they could decrease the MIC of these fluoroquinolones, indicating synergism was obtained from the association of the compounds. These results suggest the existence of a structure-activity relationship in this group of compounds with regard to the modulation of antibiotic activity. Therefore, we conclude that 1,8-naphthyridine derivatives potentiate the activity of fluoroquinolone antibiotics against multi-resistant bacterial strains, and thereby interesting candidates for the development of drugs against bacterial infections caused by multidrug resistant strains.
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Affiliation(s)
- José B. de Araújo-Neto
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Maria M. C. da Silva
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Cícera D. de M. Oliveira-Tintino
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Iêda M. Begnini
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Ricardo A. Rebelo
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Luiz E. da Silva
- Postgraduate Program in Sustainable Territorial Development—Coastal Sector, Federal University of Paraná, Curitiba 80060-000, PR, Brazil;
| | - Sandro L. Mireski
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Michele C. Nasato
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Maria I. L. Krautler
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Jaime Ribeiro-Filho
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Rua Waldemar Falcão, 121, Candeal, Salvador 40296-710, BA, Brazil;
| | - Abolghasem Siyadatpanah
- Ferdows School of Paramedical and Health, Birjand University of Medical Sciences, Birjand 9717853577, Iran
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand 9717853577, Iran
| | - Polrat Wilairatana
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Henrique D. M. Coutinho
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Saulo R. Tintino
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
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Borah B, Chowhan LR. Recent advances in the transition-metal-free synthesis of quinoxalines. RSC Adv 2021; 11:37325-37353. [PMID: 35496411 PMCID: PMC9043781 DOI: 10.1039/d1ra06942j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 10/30/2021] [Indexed: 01/04/2023] Open
Abstract
Quinoxalines, also known as benzo[a]pyrazines, constitute an important class of nitrogen-containing heterocyclic compounds as a result of their widespread prevalence in natural products, biologically active synthetic drug candidates, and optoelectronic materials. Owing to their importance and chemists' ever-increasing imagination of new transformations of these products, tremendous efforts have been dedicated to finding more efficient approaches toward the synthesis of quinoxaline rings. The last decades have witnessed a marvellous outburst in modifying organic synthetic methods to create them sustainable for the betterment of our environment. The exploitation of transition-metal-free catalysis in organic synthesis leads to a new frontier to access biologically active heterocycles and provides an alternative method from the perspective of green and sustainable chemistry. Despite notable developments achieved in transition-metal catalyzed synthesis, the high cost involved in the preparation of the catalyst, toxicity, and difficulty in removing it from the final products constitute disadvantageous effects on the atom economy and eco-friendly nature of the transformation. In this review article, we have summarized the recent progress achieved in the synthesis of quinoxalines under transition-metal-free conditions and cover the reports from 2015 to date. This aspect is presented alongside the mechanistic rationalization and limitations of the reaction methodologies. The scopes of future developments are also highlighted.
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Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat Gandhinagar-382030 India
| | - L Raju Chowhan
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat Gandhinagar-382030 India
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38
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Voronin VV, Ledovskaya MS, Rodygin KS, Ananikov VP. Cycloaddition Reactions of
in situ
Generated C
2
D
2
in Dioxane: Efficient Synthetic Approach to D
2
‐Labeled Nitrogen Heterocycles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Vladimir V. Voronin
- Institute of Chemistry Saint Petersburg State University Universitetsky prospect 26 Peterhof 198504 Russia
| | - Maria S. Ledovskaya
- Institute of Chemistry Saint Petersburg State University Universitetsky prospect 26 Peterhof 198504 Russia
| | - Konstantin S. Rodygin
- Institute of Chemistry Saint Petersburg State University Universitetsky prospect 26 Peterhof 198504 Russia
| | - Valentine P. Ananikov
- Institute of Chemistry Saint Petersburg State University Universitetsky prospect 26 Peterhof 198504 Russia
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky prospect 47 Moscow 119991 Russia
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39
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Regio- and diastereoselective synthesis of 3,4-dihydro-2H-benzo [4,5]imidazo[2,1-b] [1,3]thiazine derivatives via DBU-catalyzed [3+3] annulation of MBH carbonates with 2-mercaptobenzimidazoles. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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40
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Missioui M, Mortada S, Guerrab W, Serdaroğlu G, Kaya S, Mague JT, Essassi EM, Faouzi MEA, Ramli Y. Novel antioxidant quinoxaline derivative: Synthesis, crystal structure, theoretical studies, antidiabetic activity and molecular docking study. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130484] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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41
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Wang SC, Liu PY, Chen YX, Shen ZJ, Hao WJ, Tu SJ, Jiang B. Copper/silver co-mediated three-component bicyclization for accessing indeno[1,2- c]azepine-3,6-diones. Chem Commun (Camb) 2021; 57:7966-7969. [PMID: 34286745 DOI: 10.1039/d1cc02973h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A new copper/silver-co-mediated three-component bicyclization of benzene-linked 1,6-enynes with ICF2CO2Et with TMSN3 was reported, and used to produce a wide range of hitherto unreported difluorinated tetrahydroindeno[1,2-c]azepine-3,6-diones with moderate to good yields. The mechanistic pathway consists of radical-induced 1,6-addition-cyclization, oxidative addition, reductive elimination, nitrene insertion and N-O cleavage, resulting in continuous multiple bond-forming events including C-C and C-N bonds to build up a 6/5/7 tricyclic framework.
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Affiliation(s)
- Shi-Chao Wang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Peng-Yu Liu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Yi-Xin Chen
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Zheng-Jia Shen
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
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42
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Correia JTM, Santos MS, Pissinati EF, da Silva GP, Paixão MW. Recent Advances on Photoinduced Cascade Strategies for the Synthesis of N-Heterocycles. CHEM REC 2021; 21:2666-2687. [PMID: 34288377 DOI: 10.1002/tcr.202100160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/24/2021] [Accepted: 06/25/2021] [Indexed: 12/13/2022]
Abstract
Over the last decade, visible-light photocatalysis has proved to be a powerful tool for the construction of N-heterocyclic frameworks, important constituents of natural products, insecticides, pharmacologically relevant therapeutic agents and catalysts. This account highlights recent developments and established methods towards the photocatalytic cascades for preparation of different classes of N-heterocycles, giving emphasis on our contribution to the field.
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Affiliation(s)
- José Tiago M Correia
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Marilia S Santos
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Emanuele F Pissinati
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Gustavo P da Silva
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Márcio W Paixão
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
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43
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Sacchelli BAL, Rocha BC, Andrade LH. Cascade Reactions Assisted by Microwave Irradiation: Ultrafast Construction of 2-Quinolinone-Fused γ-Lactones from N-( o-Ethynylaryl)acrylamides and Formamide. Org Lett 2021; 23:5071-5075. [PMID: 34152153 DOI: 10.1021/acs.orglett.1c01606] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An ultrafast (10 s) methodology to construct novel highly functionalized 2-quinolinones from N-(o-ethynylaryl)acrylamides (1,7-enynes) is described for the first time. Microwave irradiation enabled the ultrafast synthesis of 2-quinolinone-fused γ-lactones from Fenton's reagents in formamide. After six key consecutive reactions, including a diastereoselective step, 2-quinolinone-fused γ-lactones were obtained in good overall yield (up to 46%; 10 s).
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Affiliation(s)
| | - Bianca C Rocha
- Instituto de Química, Universidade de São Paulo, São Paulo, Brasil
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44
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Nyaki HY, Mahmoodi NO. Synthesis and characterization of derivatives including thiazolidine-2,4-dione/1-H- imidazole and evaluation of antimicrobial, antioxidant, and cytotoxic properties of new synthetic heterocyclic compounds. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04525-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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45
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Głowacka IE, Hartwich A, Rozpara I, Piotrowska DG. Synthesis of Functionalized Diethyl(pyrrolidin-2-yl)phosphonate and Diethyl(5-oxopyrrolidin-2-yl)phosphonate. Molecules 2021; 26:molecules26113160. [PMID: 34070623 PMCID: PMC8197975 DOI: 10.3390/molecules26113160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/12/2021] [Accepted: 05/22/2021] [Indexed: 11/16/2022] Open
Abstract
Short and efficient syntheses of functionalized (pyrrolidin-2-yl)phosphonate and (5-oxopyrrolidin-2-yl)phosphonate have been developed. The synthetic strategy involved the diastereospecific 1,3-dipolar cycloaddition of N-benzyl-C-(diethoxyphosphoryl)nitrone to cis-1,4-dihydroxybut-2-ene and dimethyl maleate, respectively. O,O-Diethyl 3-carbamoyl-4-hydroxy(5-oxopyrrolidin-2-yl)phosphonate was obtained from O,O-diethyl 2-benzyl-4,5-dimethoxycarbonyl(isoxazolidin-3-yl)phosphonate by hydrogenation and subsequent treatment with ammonia, whereas transformation of O,O-diethyl 2-benzyl-4,5-dihydroxymethyl(isoxazolidin-3-yl)phosphonate into O,O-diethyl 3-aminomethyl-4-hydroxy(pyrrolidin-2-yl)phosphonate was accomplished by mesylation followed by hydrogenolysis to undergo intramolecular cyclization and the introduction of amino group via ammonolysis. Stereochemistry of the isoxazolidine cycloadducts, as well as the final functionalized (pyrrolidin-2-yl)- and (5-oxopyrrolidin-2-yl)phosphonates were established based on conformational analyses using vicinal H-H, H-P, and C-P couplings and supported by the observed diagnostic NOESY correlation signals.
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46
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Shaifali, Mehara P, Kumar A, Das P. Pd/C Catalyzed Cascade Synthesis of 2‐Arylquinazolinones from 2‐Iodoacetanilides Employing Ammonia and CO Precursors. ChemCatChem 2021. [DOI: 10.1002/cctc.202100152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shaifali
- Chemical Technology Division CSIR- Institute of Himalayan Bioresource Technology Palampur H.P 176061 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Pushkar Mehara
- Chemical Technology Division CSIR- Institute of Himalayan Bioresource Technology Palampur H.P 176061 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ashish Kumar
- Chemical Technology Division CSIR- Institute of Himalayan Bioresource Technology Palampur H.P 176061 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Pralay Das
- Chemical Technology Division CSIR- Institute of Himalayan Bioresource Technology Palampur H.P 176061 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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47
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Silva EM, Albuquerque DY, Zukerman‐Schpector J, Schwab RS. Development of a Novel Three‐step Sonogashira Cross Coupling/Deacetonation/Cycloaddition Protocol for the Synthesis of 4‐aryl‐1,2,3‐triazoles Using 2‐methyl‐3‐butyn‐2‐ol as a Versatile Acetylene Surrogate. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Everton M. Silva
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem) Departamento de Química Universidade Federal de São Carlos – UFSCar Rodovia Washington Luís, km 235 – SP-310 São Carlos São Paulo 13565-905 Brazil
| | - Danilo Yano Albuquerque
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem) Departamento de Química Universidade Federal de São Carlos – UFSCar Rodovia Washington Luís, km 235 – SP-310 São Carlos São Paulo 13565-905 Brazil
| | - Julio Zukerman‐Schpector
- Departamento de Química Universidade Federal de São Carlos – UFSCar Rodovia Washington Luís, km 235 – SP-310 São Carlos São Paulo 13565-905 Brazil
| | - Ricardo S. Schwab
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem) Departamento de Química Universidade Federal de São Carlos – UFSCar Rodovia Washington Luís, km 235 – SP-310 São Carlos São Paulo 13565-905 Brazil
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48
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Alzhrani ZMM, Alam MM, Nazreen S. Recent advancements on Benzimidazole: A versatile scaffold in medicinal chemistry. Mini Rev Med Chem 2021; 22:365-386. [PMID: 33797365 DOI: 10.2174/1389557521666210331163810] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/30/2020] [Accepted: 02/25/2021] [Indexed: 11/22/2022]
Abstract
Benzimidazole is nitrogen containing fused heterocycle which has been extensively explored in medicinal chemistry. Benzimidizole nucleus has been found to possess various biological activities such as anticancer, antimicrobial, anti-inflammatory, antiviral, antitubercular and antidiabetic. A number of benzimidazoles such as bendamustine, pantoprazole have been approved for the treatment of various illnesses whereas galeterone and GSK461364 are in clinical trials. The present review article gives an overview about the different biological activities exhibited by the benzimidazole derivatives as well as different methods used for the synthesis of benzimidazole derivatives for the past ten years.
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Affiliation(s)
| | - Mohammad Mahboob Alam
- Department of Chemistry, Faculty of Science, Albaha University, Albaha. Saudi Arabia
| | - Syed Nazreen
- Department of Chemistry, Faculty of Science, Albaha University, Albaha. Saudi Arabia
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49
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Enantiomeric Separation of New Chiral Azole Compounds. Molecules 2021; 26:molecules26010213. [PMID: 33406592 PMCID: PMC7796373 DOI: 10.3390/molecules26010213] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 12/30/2020] [Accepted: 01/01/2021] [Indexed: 11/16/2022] Open
Abstract
Twelve new azole compounds were synthesized through an ene reaction involving methylidene heterocycles and phenylmaleimide, producing four oxazoles, five thiazoles, and one pyridine derivative, and ethyl glyoxylate for an oxazole and a thiazole compound. The twelve azoles have a stereogenic center in their structure. Hence, a method to separate the enantiomeric pairs, must be provided if any further study of chemical and pharmacological importance of these compounds is to be accomplished. Six chiral stationary phases were assayed: four were based on macrocyclic glycopeptide selectors and two on linear carbohydrates, i.e., derivatized maltodextrin and amylose. The enantiomers of the entire set of new chiral azole compounds were separated using three different mobile phase elution modes: normal phase, polar organic, and reversed phase. The most effective chiral stationary phase was the MaltoShell column, which was able to separate ten of the twelve compounds in one elution mode or another. Structural similarities in the newly synthesized oxazoles provided some insights into possible chiral recognition mechanisms.
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50
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Visible-light induced generation of bifunctional nitrogen-centered radicals: a concise synthetic strategy to construct bicyclo[3.2.1] octane and azepane cores. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9852-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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