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Brahmachari G. Practice of green chemistry strategies in synthetic organic chemistry: a glimpse of our sincere efforts in green chemistry research. Chem Commun (Camb) 2024. [PMID: 38978452 DOI: 10.1039/d4cc02249a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
This feature article summarises our recent contributions (2019-2023) in designing and developing a handful of promising organic transformations for accessing several diversely functionalised biologically relevant organic scaffolds, following the green chemistry principles, particularly focusing on the application of low-energy visible light, electrochemistry, ball-milling, ultrasound, and catalyst- and additive-free synthetic strategies.
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Affiliation(s)
- Goutam Brahmachari
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan-731 235, West Bengal, India.
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2
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Olyaei A, Shafie Z, Vessally E. One-pot synthesis of a new series of 2-phenylimidazo[1,2-a]pyridine-3-yl derivatives. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2023.2191205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Abolfazl Olyaei
- Department of Chemistry, Payame Noor University (PNU), Tehran, Iran
| | - Zahra Shafie
- Department of Chemistry, Payame Noor University (PNU), Tehran, Iran
| | - Esmail Vessally
- Department of Chemistry, Payame Noor University (PNU), Tehran, Iran
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3
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Sanapalli BKR, Ashames A, Sigalapalli DK, Shaik AB, Bhandare RR, Yele V. Synthetic Imidazopyridine-Based Derivatives as Potential Inhibitors against Multi-Drug Resistant Bacterial Infections: A Review. Antibiotics (Basel) 2022; 11:antibiotics11121680. [PMID: 36551338 PMCID: PMC9774741 DOI: 10.3390/antibiotics11121680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/15/2022] [Accepted: 11/19/2022] [Indexed: 11/24/2022] Open
Abstract
Fused pyridines are reported to display various pharmacological activities, such as antipyretic, analgesic, antiprotozoal, antibacterial, antitumor, antifungal, anti-inflammatory, and antiapoptotic. They are widely used in the field of medicinal chemistry. Imidazopyridines (IZPs) are crucial classes of fused heterocycles that are expansively reported on in the literature. Evidence suggests that IZPs, as fused scaffolds, possess more diverse profiles than individual imidazole and pyridine moieties. Bacterial infections and antibacterial resistance are ever-growing risks in the 21st century. Only one IZP, i.e., rifaximin, is available on the market as an antibiotic. In this review, the authors highlight strategies for preparing other IZPs. A particular focus is on the antibacterial profile and structure-activity relationship (SAR) of various synthesized IZP derivatives. This research provides a foundation for the tuning of available compounds to create novel, potent antibacterial agents with fewer side effects.
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Affiliation(s)
- Bharat Kumar Reddy Sanapalli
- Department of Pharmacology, NIMS Institute of Pharmacy, NIMS University Rajasthan, Jaipur 303121, Rajasthan, India
| | - Akram Ashames
- College of Pharmacy & Health Sciences, Ajman University, Ajman P.O. Box 340, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 340, United Arab Emirates
- Correspondence: (A.A.); (V.Y.); Tel.: +97-16-705-6240 (A.A.); +91-949-124-9077 (V.Y.)
| | - Dilep Kumar Sigalapalli
- Department of Pharmaceutical Chemistry, Vignan Pharmacy College, Jawaharlal Nehru Technological University, Vadlamudi 522213, Andhra Pradesh, India
| | - Afzal B. Shaik
- St. Mary’s College of Pharmacy, St. Mary’s Group of Institutions Guntur, Jawaharlal Nehru Technological University Kakinada, Guntur 522212, Andhra Pradesh, India
| | - Richie R. Bhandare
- College of Pharmacy & Health Sciences, Ajman University, Ajman P.O. Box 340, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 340, United Arab Emirates
| | - Vidyasrilekha Yele
- Department of Pharmaceutical Chemistry, NIMS Institute of Pharmacy, NIMS University Rajasthan, Jaipur 303121, Rajasthan, India
- Correspondence: (A.A.); (V.Y.); Tel.: +97-16-705-6240 (A.A.); +91-949-124-9077 (V.Y.)
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4
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Jalani HB, Jeong J. p‐
Toluenesulfonic
acid Catalyzed,
Isocyanide‐Free
,
Groebke‐Blackburn‐Bienayme
(
GBB
) Type Multicomponent Synthesis of
3‐Anilino
‐imdazo[1,2‐a]pyridines. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hitesh B. Jalani
- College of Pharmacy Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak‐ro, Yeonsu‐gu Incheon South Korea
- Smart BioPharm, 310‐Pilotplant, Incheon Techno‐Park, 12‐Gaetbeol‐ro, Yeonsu‐gu Incheon South Korea
| | - Jin‐Hyun Jeong
- College of Pharmacy Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak‐ro, Yeonsu‐gu Incheon South Korea
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Brahmachari G, Nayek N, Karmakar I, Nurjamal K, Chandra SK, Bhowmick A. Series of Functionalized 5-(2-Arylimidazo[1,2- a]pyridin-3-yl)pyrimidine-2,4(1 H,3 H)-diones: A Water-Mediated Three-Component Catalyst-Free Protocol Revisited. J Org Chem 2020; 85:8405-8414. [PMID: 32469216 DOI: 10.1021/acs.joc.0c00732] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A water-mediated and catalyst-free practical method for the synthesis of a new series of pharmaceutically interesting functionalized 5-(2-arylimidazo[1,2-a]pyridin-3-yl)pyrimidine-2,4(1H,3H)-diones has been accomplished based on a one-pot multicomponent reaction between arylglyoxal monohydrates, 2-aminopyridines/2-aminopyrimidine, and barbituric/N,N-dimethylbarbituric acids under reflux conditions. The salient features of this protocol are avoidance of any additive/catalyst and toxic organic solvents, use of water as reaction medium, clean reaction profiles, operational simplicity, ease of product isolation/purification without the aid of tedious column chromatography, good to excellent yields, and high atom-economy and low E-factor.
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Affiliation(s)
- Goutam Brahmachari
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731 235, West Bengal, India
| | - Nayana Nayek
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731 235, West Bengal, India
| | - Indrajit Karmakar
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731 235, West Bengal, India
| | - Khondekar Nurjamal
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731 235, West Bengal, India
| | - Swapan K Chandra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731 235, West Bengal, India
| | - Anindita Bhowmick
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731 235, West Bengal, India
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6
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Veer B, Singh R. Facile synthesis of 2-arylimidazo[1,2-a]pyridines catalysed by DBU in aqueous ethanol. Proc Math Phys Eng Sci 2019. [DOI: 10.1098/rspa.2019.0238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
A facile protocol for the synthesis of 2-arylimidazo[1,2-a]pyridines was developed using two-component cyclization of substituted 2-aminopyridines and substituted phenacyl bromides in 65–94% yield. The reaction was DBU catalysed using green solvent, aqueous ethanol (1 : 1 v/v) at room temperature. The atom economy of the products was calculated to be 66.25–73.41%. The developed protocol successfully exhibits a broad substrate scope, less reaction time, high to moderate yield and multigram scale synthesis.
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Affiliation(s)
- Babita Veer
- Department of Applied Chemistry, Delhi Technological University, Delhi 110 042, India
| | - Ram Singh
- Department of Applied Chemistry, Delhi Technological University, Delhi 110 042, India
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7
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Roslan II, Ng KH, Jaenicke S, Chuah GK. Photocatalytic regeneration of brominating agent in the visible light-mediated synthesis of imidazo[1,2-a]pyridines. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00141g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Regenerating the brominating agent by erythrosine B closes a catalytic cycle for the construction of the imidazo[1,2-a]pyridine framework.
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Affiliation(s)
| | - Kian-Hong Ng
- Department of Chemistry
- National University of Singapore
- Singapore 117543
| | - Stephan Jaenicke
- Department of Chemistry
- National University of Singapore
- Singapore 117543
| | - Gaik-Khuan Chuah
- Department of Chemistry
- National University of Singapore
- Singapore 117543
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8
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Ravichandiran P, Lai B, Gu Y. Aldo-X Bifunctional Building Blocks for the Synthesis of Heterocycles. CHEM REC 2016; 17:142-183. [DOI: 10.1002/tcr.201600042] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Palanisamy Ravichandiran
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
| | - Bingbing Lai
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
| | - Yanlong Gu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Lanzhou 730000 P.R. China
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9
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Cheng C, Liu C, Gu Y. One-pot three-component reactions of methyl ketones, phenols and a nucleophile: an expedient way to synthesize densely substituted benzofurans. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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10
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Kundu S, Basu B. Graphene oxide (GO)-catalyzed multi-component reactions: green synthesis of library of pharmacophore 3-sulfenylimidazo[1,2-a]pyridines. RSC Adv 2015. [DOI: 10.1039/c5ra04983k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene oxide (GO)-catalyzed multi-component reactions: green synthesis of library of pharmacophore 3-sulfenylimidazo[1,2-a]pyridines
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Affiliation(s)
- Samir Kundu
- Department of Chemistry
- North Bengal University
- Darjeeling 734013
- India
| | - Basudeb Basu
- Department of Chemistry
- North Bengal University
- Darjeeling 734013
- India
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11
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Bagdi AK, Santra S, Monir K, Hajra A. Synthesis of imidazo[1,2-a]pyridines: a decade update. Chem Commun (Camb) 2015; 51:1555-75. [DOI: 10.1039/c4cc08495k] [Citation(s) in RCA: 438] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Here we describe the various strategies for the synthesis of imidazo[1,2-a]pyridines.
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Affiliation(s)
- Avik Kumar Bagdi
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Sougata Santra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Kamarul Monir
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
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