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Singh V, Rajput K, Singh S, Srivastava V. Montmorillonite K-10 catalyzed synthesis of Hantzsch dihydropyridine derivatives from methyl arenes via in situ generated ammonia under microwave irradiation in neat conditions. RSC Adv 2024; 14:27086-27091. [PMID: 39193309 PMCID: PMC11348851 DOI: 10.1039/d4ra04990j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Accepted: 08/19/2024] [Indexed: 08/29/2024] Open
Abstract
An expeditious, efficient, and environmentally friendly approach has been established for the synthesis of diverse Hantzsch 1,4-dihydropyridine derivatives utilizing montmorillonite K-10 as a catalyst in solvent-free conditions. The procedure entails the reaction of methyl arynes as a sustainable surrogate of aryl aldehydes, active methylene compounds, and urea hydrogen peroxide (UHP) as an oxidising agent as well as a source of ammonia under microwave irradiation, facilitated by montmorillonite K-10.
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Affiliation(s)
- Vishal Singh
- Department of Chemistry, Indian Institute of Technology (BHU) Varanasi 221005 UP India +91-9453365168
| | - Khushbu Rajput
- Department of Chemistry, Indian Institute of Technology (BHU) Varanasi 221005 UP India +91-9453365168
| | - Sundaram Singh
- Department of Chemistry, Indian Institute of Technology (BHU) Varanasi 221005 UP India +91-9453365168
| | - Vandana Srivastava
- Department of Chemistry, Indian Institute of Technology (BHU) Varanasi 221005 UP India +91-9453365168
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2
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Moraes CO, Santos RBC, Cavalcante MFO, Guilhermi JS, Ali MA, Botteselle GV, Frizon TEA, Shah MIA, Lião LM, Beatriz A, Saba S, Rafique J. Urea Hydrogen Peroxide and Ethyl Lactate, an Eco-Friendly Combo System in the Direct C(sp 2)-H Bond Selenylation of Imidazo[2,1- b]thiazole and Related Structures. ACS OMEGA 2023; 8:39535-39545. [PMID: 37901565 PMCID: PMC10600889 DOI: 10.1021/acsomega.3c05338] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 09/27/2023] [Indexed: 10/31/2023]
Abstract
Herein, we describe a urea hydrogen peroxide-mediated sustainable protocol for the synthesis of selenylated imidazo[2,1-b]thiazole by using half molar equivalent diorganyl diselenides in ethyl lactate as a greener solvent. The reaction features high yields, easy performance on gram scale, metal-free conditions, as well as applicability to imidazopyridine and imidazopyrimidine.
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Affiliation(s)
- Cassio
A. O. Moraes
- Instituto
de Química, Universidade Federal
do Mato Grosso do Sul, Campo
Grande, Mato Grosso do Sul 79074-460, Brazil
| | - Rafaely B. C. Santos
- Instituto
de Química, Universidade Federal
do Mato Grosso do Sul, Campo
Grande, Mato Grosso do Sul 79074-460, Brazil
| | - Marcos F. O. Cavalcante
- LABSO,
Instituto de Química, Universidade
Federal de Goiás—UFG, Goiânia, Goiás 74690-900, Brazil
| | - Jhefferson S. Guilhermi
- LABSO,
Instituto de Química, Universidade
Federal de Goiás—UFG, Goiânia, Goiás 74690-900, Brazil
| | - Muhammad A. Ali
- Institute
of Chemistry (ICS), University of Peshawar—UOP, Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
| | - Giancarlo V. Botteselle
- Departamento
de Química, Universidade Estadual
do Centro-Oeste—UNICENTRO, Guarapuava, Paraná 85819110, Brazil
| | - Tiago E. A. Frizon
- Universidade
Federal de Santa Catarina—UFSC, Campus Araranguá, Araranguá, Santa Catarina 88905120, Brazil
| | - Muhammad I. A. Shah
- Department
of Chemistry, Abdul Wali Khan University, Mardan, Khyber Pakhtunkhwa 23200, Pakistan
| | - Luciano M. Lião
- LABSO,
Instituto de Química, Universidade
Federal de Goiás—UFG, Goiânia, Goiás 74690-900, Brazil
| | - Adilson Beatriz
- Instituto
de Química, Universidade Federal
do Mato Grosso do Sul, Campo
Grande, Mato Grosso do Sul 79074-460, Brazil
| | - Sumbal Saba
- LABSO,
Instituto de Química, Universidade
Federal de Goiás—UFG, Goiânia, Goiás 74690-900, Brazil
| | - Jamal Rafique
- Instituto
de Química, Universidade Federal
do Mato Grosso do Sul, Campo
Grande, Mato Grosso do Sul 79074-460, Brazil
- LABSO,
Instituto de Química, Universidade
Federal de Goiás—UFG, Goiânia, Goiás 74690-900, Brazil
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3
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Ahmad A, Rao S, Shetty NS. Green multicomponent synthesis of pyrano[2,3- c]pyrazole derivatives: current insights and future directions. RSC Adv 2023; 13:28798-28833. [PMID: 37790089 PMCID: PMC10543893 DOI: 10.1039/d3ra05570a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 09/22/2023] [Indexed: 10/05/2023] Open
Abstract
The past decade has witnessed significant progress in synthesizing structurally diverse and biologically relevant pyrano[2,3-c]pyrazole derivatives through the integration of green methodologies. This review summarizes the recent advances in the green multicomponent synthesis of pyrano[2,3-c]pyrazole and spiro-pyrano[2,3-c]pyrazole derivatives. These include the application of energy-efficient techniques such as microwave and ultrasound-assisted synthesis, benign catalysts and biodegradable composites, solvent selection with a focus on water as a renewable and non-toxic medium, and solvent-free conditions. The review consolidates the current knowledge and future research directions, providing a valuable resource for researchers dedicated to advancing green chemistry practices.
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Affiliation(s)
- Afrisham Ahmad
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education Manipal Karnataka 576104 India
| | - Sithara Rao
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education Manipal Karnataka 576104 India
| | - Nitinkumar S Shetty
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education Manipal Karnataka 576104 India
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Sulfonic acid pyridinium chloride-functionalized nanoparticles (MnCoFe2O4@Niacin-SO3H)+Cl− as a novel and reusable catalyst for synthesis of tetrahydrodipyrazolopyridines and pyranopyrazoles. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04800-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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An aqueous hydrotropic solution as environmentally benign reaction medium for organic transformations: a short review. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04761-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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