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R T, Yhobu Z, Budagumpi S, Małecki JG, Ghosh A, Limaye AS, R N, Dateer RB. Room-Temperature Synthesis of Biogenic δ-MnO 2 NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15474-15486. [PMID: 37874355 DOI: 10.1021/acs.langmuir.3c01749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
An efficient, unique, and eco-friendly biogenic synthesis of single-crystalline δ-phase manganese oxide nanoparticles (MnO2 NPs) using Gliricidia sepium leaves (GSL) extract at room temperature has been revealed for the first time. The active chemicals present in the GSL extract were found to serve as both reducing and stabilizing agents. The catalyst shows an excellent surface area of 301.13 m2 g-1, a mean pore diameter of 4.01 nm, and 39.97% w/w of active metal content. The reactivity of the synthesized catalyst was demonstrated by achieving a one-pot synthesis of benzimidazoles and quinoxalines via an acceptorless dehydrogenative coupling strategy utilizing biorenewable alcohols. The release of hydrogen gas was observed as the only side product and proven by its successful utilization for alkene reduction which supports the mechanistic elucidation. The release of hydrogen gas as a useful byproduct highlights the scientific importance of the present methodology. Additionally, gram-scale synthesis and catalyst recyclability studies are deliberated. Importantly, the δ-MnO2 NP catalyst exhibited superior catalytic activity and high durability toward hydrogen evolution reaction in alkaline media, highlighting the dual use of the catalyst. The δ-MnO2 NPs attain the current density of 10 mA/cm2 at an overpotential of 154 mV with a Tafel slope of 119 mV/dec.
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Affiliation(s)
- Thrilokraj R
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
| | - Zhoveta Yhobu
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
| | - Srinivasa Budagumpi
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
| | | | - Arnab Ghosh
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
| | - Akshay S Limaye
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
| | - Nandini R
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
| | - Ramesh B Dateer
- Centre for Nano and Material Sciences, JAIN (Deemed to be University), Jain Global Campus, Bangalore 562112, India
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Fessler J, Junge K, Beller M. Applying green chemistry principles to iron catalysis: mild and selective domino synthesis of pyrroles from nitroarenes. Chem Sci 2023; 14:11374-11380. [PMID: 37886090 PMCID: PMC10599485 DOI: 10.1039/d3sc02879h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 08/02/2023] [Indexed: 10/28/2023] Open
Abstract
An efficient and general cascade synthesis of pyrroles from nitroarenes using an acid-tolerant homogeneous iron catalyst is presented. Initial (transfer) hydrogenation using the commercially available iron-Tetraphos catalyst is followed by acid catalysed Paal-Knorr condensation. Both formic acid and molecular hydrogen can be used as green reductants in this process. Particularly, under transfer hydrogenation conditions, the homogeneous catalyst shows remarkable reactivity at low temperatures, high functional group tolerance and excellent chemoselectivity transforming a wide variety of substrates. Compared to classical heterogeneous catalysts, this system presents complementing reactivity, showing none of the typical side reactions such as dehalogenation, debenzylation, arene or olefin hydrogenation. It thereby enhances the chemical toolbox in terms of orthogonal reactivity. The methodology was successfully applied to the late-stage modification of multi-functional drug(-like) molecules as well as to the one-pot synthesis of the bioactive agent BM-635.
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Affiliation(s)
- Johannes Fessler
- Leibniz-Institut für Katalyse e.V. (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Germany
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Putta RR, Chun S, Lee SB, Hong J, Choi SH, Oh DC, Hong S. Chemoselective α-Alkylation and α-Olefination of Arylacetonitriles with Alcohols via Iron-Catalyzed Borrowing Hydrogen and Dehydrogenative Coupling. J Org Chem 2022; 87:16378-16389. [PMID: 36417466 DOI: 10.1021/acs.joc.2c02050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
α-Alkyl and α-olefin nitriles are very important for organic synthesis and medicinal chemistry. However, different types of catalysts are employed to achieve either α-alkylation of nitriles by borrowing hydrogen or α-olefination by dehydrogenative coupling methods. Designing and developing high-performance earth-abundant catalysts that can procure different products from the same starting materials remain a great challenge. Herein, we report an iron(0) catalyst system that achieves chemoselectivity between borrowing hydrogen and dehydrogenative coupling protocols by simply changing the base. A broad range of nitriles and alcohols, including benzylic, linear aliphatic, cycloaliphatic, heterocyclic, and allylic alcohols, were selectively and efficiently converted to the corresponding products. Mechanistic studies reveal that the reaction mechanism proceeds through a dehydrogenative pathway. This iron catalytic protocol is environmentally benign and atom-efficient with the liberation of H2 and H2O as green byproducts.
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Affiliation(s)
- Ramachandra Reddy Putta
- BK 21 Plus Project, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Simin Chun
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Seok Beom Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Junhwa Hong
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung Hyun Choi
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Suckchang Hong
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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Sohail M, Bilal M, Maqbool T, Rasool N, Ammar M, Mahmood S, Malik A, Zubair M, Abbas Ashraf G. Iron-catalyzed synthesis of N-heterocycles via intermolecular and intramolecular cyclization reactions: A review. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Iron-catalyzed reductive cyclization of nitroarenes: Synthesis of aza-heterocycles and DFT calculations. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shui H, Zhong Y, Luo N, Luo R, Ouyang L. Iridium-Catalyzed Acceptorless Dehydrogenative Coupling of 2-Aminoarylmethanols with Amides or Nitriles to Synthesize Quinazolines. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1755-4700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
AbstractAn efficient iridium-catalyzed acceptorless dehydrogenative coupling (ADC) reaction for the preparation of various quinazolines from 2-aminoarylmethanols and amides or nitriles had been developed. A wide range of substituted 2-aminobenzyl alcohols and (hetero)aryl or alkyl benzamides and nitriles were well compatible to afford various quinazolines in excellent yields. Merits of this new strategy are the high atom-economy, mild reaction conditions, and simple operation, and the methodology is suitable for a variety of substrates.
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Kabi AK, Gujjarappa R, Roy A, Sahoo A, Musib D, Vodnala N, Singh V, Malakar CC. Transition-Metal-Free Transfer Hydrogenative Cascade Reaction of Nitroarenes with Amines/Alcohols: Redox-Economical Access to Benzimidazoles. J Org Chem 2021; 86:14597-14607. [PMID: 34662119 DOI: 10.1021/acs.joc.1c01450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This report describes an efficient transition-metal-free process toward the transfer hydrogenative cascade reaction between nitroarenes and amines or alcohols. The developed redox-economical approach was realized using a combination of KOtBu and Et3SiH as reagents, which allows the synthesis of benzimidazole derivatives via σ-bond metathesis. The reaction conditions hold well over a wide range of substrates embedded with diverse functional groups to deliver the desired products in good to excellent yields. The mechanistic proposal has been depicted on the basis of a series of control experiments, mass spectroscopic evidence which is well supported by density functional theory (DFT) calculations with a feasible energy profile.
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Affiliation(s)
- Arup K Kabi
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Raghuram Gujjarappa
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Anupam Roy
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Abhishek Sahoo
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Dulal Musib
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Nagaraju Vodnala
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India.,Department of Chemistry, Indian Institute of Technology Delhi, Multi-Storey Building, HauzKhas, New Delhi, 110016 India
| | - Virender Singh
- Department of Chemistry, Central University of Punjab, Bathinda, 151401 Punjab, India
| | - Chandi C Malakar
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
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Rock J, Garcia D, Espino O, Shetu SA, Chan-Bacab MJ, Moo-Puc R, Patel NB, Rivera G, Bandyopadhyay D. Benzopyrazine-Based Small Molecule Inhibitors As Trypanocidal and Leishmanicidal Agents: Green Synthesis, In Vitro, and In Silico Evaluations. Front Chem 2021; 9:725892. [PMID: 34604170 PMCID: PMC8484882 DOI: 10.3389/fchem.2021.725892] [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: 06/16/2021] [Accepted: 09/01/2021] [Indexed: 01/18/2023] Open
Abstract
World Health Organization (WHO) identified twenty tropical disease categories as neglected tropical diseases (NTDs). Chagas' disease (also known as American trypanosomiasis) and leishmaniasis are two major classes of NTDs. The total number of mortality, morbidity, and disability attributed each year due to these two categories of diseases in magnitudes is much higher than the so-called elite diseases like cancer, diabetes, AIDS, cardiovascular and neurodegenerative diseases. Impoverished communities around the world are the major victim of NTDs. The development of new and novel drugs in the battle against Chagas' disease and leishmaniasis is highly anticipated. An easy and straightforward on-water green access to synthesize benzopyrazines is reported. This ultrasound-assisted procedure does not require any catalyst/support/additive/hazardous solvents and maintains a high atom economy. A series of eleven benzopyrazines has been synthesized, and most of the synthesized compounds possess the drug-likeness following Lipinski's "Rule of 5". Benzopyrazines 3 and 4 demonstrated moderate leishmanicidal activity against L. mexicana (M378) strain. The selective lead compound 1 showed good leishmanicidal, and trypanocidal activities (in vitro) against both L. mexicana (M378) and T. cruzi (NINOA) strains compared to the standard controls. The in vitro trypanocidal and leishmanicidal activities of the lead compound 1 have been validated by molecular docking studies against four biomolecular drug targets viz. T. cruzi histidyl-tRNA synthetase, T. cruzi trans-sialidase, leishmanial rRNA A-site, and leishmania major N-myristoyl transferase.
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Affiliation(s)
- Jonathan Rock
- Department of Chemistry, University of Texas Rio Grande Valley, Edinburg, TX, United States
| | - Daniel Garcia
- Department of Chemistry, University of Texas Rio Grande Valley, Edinburg, TX, United States
| | - Omar Espino
- Department of Chemistry, University of Texas Rio Grande Valley, Edinburg, TX, United States
| | - Shaila A. Shetu
- Department of Chemistry, University of Texas Rio Grande Valley, Edinburg, TX, United States
| | - Manuel J. Chan-Bacab
- Departamento de Microbiología Ambiental y Biotecnología, Universidad Autónoma de Campeche, Campeche, México
| | - Rosa Moo-Puc
- Unidad Médica de Alta Especialidad, Instituto Mexicano Del Seguro Social, Mérida, México
| | - Navin B. Patel
- Department of Chemistry, Veer Narmad South Gujarat University, Gujrat, India
| | - Gildardo Rivera
- Laboratorio de Biotecnología Farmacéutica, Centro de Biotecnología Genómica, Instituto Politécnico Nacional, Reynosa, México
| | - Debasish Bandyopadhyay
- Department of Chemistry, University of Texas Rio Grande Valley, Edinburg, TX, United States
- School of Earth Environment and Marine Sciences (SEEMS), University of Texas Rio Grande Valley, Edinburg, TX, United States
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