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Parmar MP, Vala DP, Bhalodiya SS, Upadhyay DB, Patel CD, Patel SG, Gandholi SR, Shaik AH, Miller AD, Nogales J, Banerjee S, Padrón JM, Amri N, Kandukuri NK, Patel HM. A green bio-organic catalyst (taurine) promoted one-pot synthesis of ( R/ S)-2-thioxo-3,4-dihydropyrimidine(TDHPM)-5-carboxanilides: chiral investigations using circular dichroism and validation by computational approaches. RSC Adv 2024; 14:9300-9313. [PMID: 38505382 PMCID: PMC10949965 DOI: 10.1039/d4ra01391c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 02/29/2024] [Indexed: 03/21/2024] Open
Abstract
Owing to the massive importance of dihydropyrimidine (DHPMs) scaffolds in the pharmaceutical industry and other areas, we developed an effective and sustainable one-pot reaction protocol for the synthesis of (R/S)-2-thioxo-DHPM-5-carboxanilides via the Biginelli-type cyclo-condensation reaction of aryl aldehydes, thiourea and various acetoacetanilide derivatives in ethanol at 100 °C. In this protocol, taurine was used as a green and reusable bio-organic catalyst. Twenty-three novel derivatives of (R/S)-TDHPM-5-carboxanilides and their structures were confirmed by various spectroscopy techniques. The aforementioned compounds were synthesized via the formation of one asymmetric centre, one new C-C bond, and two new C-N bonds in the final product. All the newly synthesized compounds were obtained in their racemic form with up to 99% yield. In addition, the separation of the racemic mixture of all the newly synthesized compounds was carried out by chiral HPLC (Prep LC), which provided up to 99.99% purity. The absolute configuration of all the enantiomerically pure isomers was determined using a circular dichroism study and validated by a computational approach. With up to 99% yield of 4d, this one-pot synthetic approach can also be useful for large-scale industrial production. One of the separated isomers (4R)-(+)-4S developed as a single crystal, and it was found that this crystal structure was orthorhombic.
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Affiliation(s)
- Mehul P Parmar
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Disha P Vala
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Savan S Bhalodiya
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Dipti B Upadhyay
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Chirag D Patel
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Subham G Patel
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Srinivasa R Gandholi
- YMC Application Lab Plot No. 78/A/6, Phase VI, Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal Hyderabad-500055 Telangana India
| | - Althaf H Shaik
- YMC Application Lab Plot No. 78/A/6, Phase VI, Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal Hyderabad-500055 Telangana India
| | - Amy Dunne Miller
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee Dundee UK
| | - Joaquina Nogales
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee Dundee UK
| | - Sourav Banerjee
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee Dundee UK
| | - José M Padrón
- BioLab, Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna Avda. Astrofísico Francisco Sánchez 2 38206 La Laguna Spain
| | - Nasser Amri
- Department of Chemistry, College of Science, Jazan University P.O. Box 2097 Jazan 45142 Saudi Arabia
| | - Nagesh Kumar Kandukuri
- YMC Application Lab Plot No. 78/A/6, Phase VI, Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal Hyderabad-500055 Telangana India
| | - Hitendra M Patel
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
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2
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Patel PJ, Patel SG, Upadhyay DB, Ravi L, Dhanasekaran A, Patel HM. An efficient, catalyst-free and aqueous ethanol-mediated synthesis of 5-((2-aminothiazol-5-yl)(phenyl)methyl)-6-hydroxypyrimidine-2,4(1 H,3 H)-dione derivatives and their antioxidant activity. RSC Adv 2023; 13:24466-24473. [PMID: 37593670 PMCID: PMC10427891 DOI: 10.1039/d3ra03998f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/07/2023] [Indexed: 08/19/2023] Open
Abstract
In this study, we effectively developed a catalyst-free multicomponent synthesis of 5-((2-aminothiazol-5-yl)(phenyl)methyl)-6-hydroxypyrimidine-2,4(1H,3H)-dione derivatives employing 2-aminothiazole, N',N'-dimethyl barbituric acid/barbituric acid and different aldehydes at 80 °C in an aqueous ethanol medium (1 : 1) using group-assisted purification (GAP) chemistry. The essential characteristics of this methodology include superior green credential parameters, metal-free multicomponent synthesis, faster reaction times, greater product yields, simple product purification without column chromatography and higher product yields. All of the synthesized compounds were analyzed against the HepG2 cell line. Compounds 4j and 4k shows good anti-proliferative effects on HepG2 cells. Furthermore, the ABTS and DPPH scavenging assays were used to determine the antioxidant activity of all compounds (4a-r). In both ABTS and DPPH radical scavenging assays, compounds 4e, 4i, 4j, 4o and 4r exhibit excellent potency compared to the standard ascorbic acid.
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Affiliation(s)
- Paras J Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120 Gujarat India
| | - Subham G Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120 Gujarat India
| | - Dipti B Upadhyay
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120 Gujarat India
| | - Logeswari Ravi
- Centre for Biotechnology, Anna University Chennai Tamil Nadu India
| | | | - Hitendra M Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120 Gujarat India
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3
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Patel PJ, Vala RM, Patel SG, Upadhyay DB, Rajani DP, Damiri F, Berrada M, Patel HM. Catalyst-free synthesis of imidazo[5,1-b]quinazolines and their antimicrobial activity. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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4
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Water mediated TBAB catalyzed synthesis of spiro-indoline-pyrano[3,2-c]quinolines as α-amylase inhibitor and in silico studies. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Patel P, Patel DM, Vala RM, Patel SG, Upadhyay DB, Pannerselvam Y, Patel HM. Catalyst-Free, Room-Temperature Accessible Regioselective Synthesis of Spiroquinolines and Their Antioxidant Study. ACS OMEGA 2023; 8:444-456. [PMID: 36643529 PMCID: PMC9835643 DOI: 10.1021/acsomega.2c05020] [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: 08/06/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
An efficient, regioselective, and environmentally benign approach was established using the multicomponent reaction-based synthesis of novel antioxidant spiroquinoline derivatives such as spiro[dioxolo[4,5-g]quinoline], spiro[dioxino[2,3-g]quinoline], and spiro[pyrazolo[4,3-f]quinoline] by reaction of aryl aldehyde, Meldrum's acid, and amine derivatives under an additive-free reaction in aqueous ethanol. Here, two asymmetric carbon centers, three new C-C bonds, and one C-N bond are developed in the final motif. This synthetic methodology offers excellent yields with an easy workup procedure, high diastereoselectivity [d.r. >50:1 (cis/trans)], admirable atom economy, and low E-factor values. Synthesized spiro compounds were investigated for their in vitro antioxidant activity by 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays. In the ABTS radical scavenging assay, compounds 4d, 4f, and 4l exhibit excellent potency, and in the DPPH radical scavenging assay, compounds 4a, 4d, 4f, and 4g, exhibit excellent potency.
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Affiliation(s)
- Paras
J. Patel
- Department
of Chemistry, Sardar Patel University, Vallabh Vidyanagar388120, Gujarat, India
| | - Divyang M. Patel
- Department
of Chemistry, AEPS Institute of Science, Ankleshwar393002, Gujarat, India
- Veer
Narmad South Gujarat University, Surat395007, Gujarat, India
| | - Ruturajsinh M. Vala
- Department
of Chemistry, Sardar Patel University, Vallabh Vidyanagar388120, Gujarat, India
| | - Subham G. Patel
- Department
of Chemistry, Sardar Patel University, Vallabh Vidyanagar388120, Gujarat, India
| | - Dipti B. Upadhyay
- Department
of Chemistry, Sardar Patel University, Vallabh Vidyanagar388120, Gujarat, India
| | - Yuvaraj Pannerselvam
- Branch
laboratory, CSIR-North East Institute of
Science & Technology (NEIST), Imphal795004, Manipur, India
| | - Hitendra M. Patel
- Department
of Chemistry, Sardar Patel University, Vallabh Vidyanagar388120, Gujarat, India
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6
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Vala RM, Tandon V, Nicely LG, Guo L, Gu Y, Banerjee S, Patel HM. Synthesis of N-(4-chlorophenyl) substituted pyrano[2,3-c]pyrazoles enabling PKBβ/AKT2 inhibitory and in vitro anti-glioma activity. Ann Med 2022; 54:2549-2561. [PMID: 36120909 PMCID: PMC9683054 DOI: 10.1080/07853890.2022.2123559] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
A series of N-(4-chlorophenyl) substituted pyrano[2,3-c]pyrazoles was synthesised and screened for their potential to inhibit kinases and exhibit anticancer activity against primary patient-derived glioblastoma 2D cells and 3D neurospheres. A collection of 10 compounds was evaluated against glioma cell lines, with compound 4j exhibiting promising glioma growth inhibitory properties. Compound 4j was screened against 139 purified kinases and exhibited low micromolar activity against kinase AKT2/PKBβ. AKT signalling is one of the main oncogenic pathways in glioma and is often targeted for novel therapeutics. Indeed, AKT2 levels correlated with glioma malignancy and poorer patient survival. Compound 4j inhibited the 3D neurosphere formation in primary patient-derived glioma stem cells and exhibited potent EC50 against glioblastoma cell lines. Although exhibiting potency against glioma cells, 4j exhibited significantly less cytotoxicity against non-cancerous cells even at fourfold-fivefold the concentration. Herein we establish a novel biochemical kinase inhibitory function for N-(4-chlorophenyl) substituted pyrano[2,3-c]pyrazoles and further report their anti-glioma activity in vitro for the first time.KEY MESSAGEAnti-glioma pyrano[2,3-c]pyrazole 4j inhibited the 3D neurosphere formation in primary patient-derived glioma stem cells. 4j also displayed PKBβ/AKT2 inhibitory activity. 4j is nontoxic towards non-cancerous cells.
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Affiliation(s)
- Ruturajsinh M Vala
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, India
| | - Vasudha Tandon
- Department of Cellular & Systems Medicine, School of Medicine, University of Dundee, Dundee, UK
| | - Lynden G Nicely
- Department of Cellular & Systems Medicine, School of Medicine, University of Dundee, Dundee, UK
| | - Luxia Guo
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Yanlong Gu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Sourav Banerjee
- Department of Cellular & Systems Medicine, School of Medicine, University of Dundee, Dundee, UK
| | - Hitendra M Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, India
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7
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Rapid and Simple Microwave-Assisted Synthesis of Benzoxazoles Catalyzed by [CholineCl][Oxalic Acid]. Catalysts 2022. [DOI: 10.3390/catal12111394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Microwave irradiation has been used to enhance the reaction yields and selectivities for organic transformation. In this paper, microwave irradiation (MW) was investigated for the environmentally benign synthesis of benzoxazoles through the cyclization of 2-aminophenols and benzaldehydes using deep eutectic solvent (DES) as a catalyst. The [CholineCl][oxalic acid] was easily synthesized from choline chloride with oxalic acid and used without further purification. [CholineCl][oxalic acid] catalyzed the synthesis of benzoxazoles to produce the desired product in a good to excellent conversion and selectivity under MW irradiation. The presence of [CholineCl][oxalic acid] helps to promote the rapid heating transfer from microwave irradiation into the reaction mixture. The [CholineCl][oxalic acid] can be recovered and reused several times without a considerable degradation in catalytic activity.
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Bagherinejad A, Alizadeh A. A review of the synthetic strategies toward spirobarbiturate-fused 3- to 7-membered rings. Org Biomol Chem 2022; 20:7188-7215. [PMID: 36070341 DOI: 10.1039/d2ob01326f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spiro-connected hexahydropyrimidine-2,4,6-trione heterocyclic rings have received increasing attention from the viewpoint of biological activity and synthetic methods due to the importance of the rigid heterocyclic system and unique orientation of the functional substituents. Since 1900, numerous studies have exploited the synthesis of various spirobarbiturate-fused carbo- and heterocycles by applying different strategies. Due to the importance of barbiturate-based olefins as activated alkenes, these substrates have been utilized in many reactions. In addition, the nucleophilic addition of 1,3-disubstituted barbituric acid to different electrophiles has been applied to prepare highly functionalized spirobarbiturate scaffolds. This short review highlights various strategies for synthesizing spirobarbiturate-fused 3- to 7-membered carbo- and heterocyclic rings and some catalytic diastereoselective and enantioselective chemical reactions to access chiral compounds. The sections are divided by the incorporation of 3- to 7-membered heterocyclic or carbocyclic rings into a spirobarbiturate scaffold, and are presented in different subsections depending on the mechanistic details.
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Affiliation(s)
- Akram Bagherinejad
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
| | - Abdolali Alizadeh
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
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9
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Sharma MG, Vala RM, Rajani DP, Ramkumar V, Gardas RL, Banerjee S, Patel HM. Crystal structure, antibacterial and antifungal evaluation of 5-bromothiophene based 3,4-dihydropyrimidin-2-(1 H)-(thi)ones. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2022.2121397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Mayank G. Sharma
- Department of Chemistry, Sardar Patel University, Gujarat, India
| | | | | | - Venkatachalam Ramkumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India
| | - Ramesh L. Gardas
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India
| | - Sourav Banerjee
- Department of Cellular Medicine, School of Medicine, University of Dundee, Dundee, UK
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10
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Patel SG, Vala RM, Patel PJ, Upadhyay DB, Ramkumar V, Gardas RL, Patel HM. Synthesis, crystal structure and in silico studies of novel 2,4-dimethoxy-tetrahydropyrimido[4,5- b]quinolin-6(7 H)-ones. RSC Adv 2022; 12:18806-18820. [PMID: 35873341 PMCID: PMC9240959 DOI: 10.1039/d2ra02694e] [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: 04/28/2022] [Accepted: 06/21/2022] [Indexed: 01/18/2023] Open
Abstract
Herein, acetic acid mediated multicomponent synthesis of novel 2,4-dimethoxy-tetrahydropyrimido[4,5-b]quinolin-6(7H)-one (2,4-dimethoxy-THPQs) was reported. Single-crystal XRD analysis of four newly developed crystals of 2,4-dimethoxy-THPQs and their DFT study were also reported. The structure of all molecules was optimized using DFT B3LYP/6-31G(d) level and compared with the corresponding single-crystal XRD data. As a result, the theoretical and experimental geometrical parameters (bond lengths and bond angles) were found to be in good agreement. Frontier molecular orbital (FMO) and molecule electrostatic potential (MEP) analyses were used to investigate the physicochemical properties and relative reactivity of 2,4-dimethoxy-THPQs. The formation of strong C–H⋯O and N–H⋯O interaction was investigated by Hirshfeld analysis. Furthermore, electronic charge density concentration in 2,4-dimethoxy-THPQs was analysed by the Mulliken atomic charges which helps to predict the ability of 2,4-dimethoxy-THPQs to bind in the receptor. The molecular docking of the crystal structure of 2,4-dimethoxy-THPQs in the main protease (Mpro) of SARS-CoV-2 suggested that all four 2,4-dimethoxy-THPQs efficiently docked in Mpro. Furthermore, 2,4-dimethoxy-THPQs with a 3-chloro substitution in the phenyl ring have the highest binding affinity because of the additional formation of halogen bonds and highest dipole moment. Single-crystal XRD analysis of 2,4-dimethoxy THPQs and their relative reactivity with properties were investigated using DFT calculation. Molecular docking studies show they effectively docked with main protease of SARS-CoV-2.![]()
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Affiliation(s)
- Subham G Patel
- Department of Chemistry, Sardar Patel University Vallabh Vidyanagar 388120 Gujarat India
| | - Ruturajsinh M Vala
- Department of Chemistry, Sardar Patel University Vallabh Vidyanagar 388120 Gujarat India
| | - Paras J Patel
- Department of Chemistry, Sardar Patel University Vallabh Vidyanagar 388120 Gujarat India
| | - Dipti B Upadhyay
- Department of Chemistry, Sardar Patel University Vallabh Vidyanagar 388120 Gujarat India
| | - V Ramkumar
- Department of Chemistry, Indian Institute of Technology, Madras India
| | - Ramesh L Gardas
- Department of Chemistry, Indian Institute of Technology, Madras India
| | - Hitendra M Patel
- Department of Chemistry, Sardar Patel University Vallabh Vidyanagar 388120 Gujarat India
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Nicely LG, Vala RM, Upadhyay DB, Nogales J, Chi C, Banerjee S, Patel HM. One-pot two-step catalytic synthesis of 6-amino-2-pyridone-3,5-dicarbonitriles enabling anti-cancer bioactivity. RSC Adv 2022; 12:23889-23897. [PMID: 36093229 PMCID: PMC9400646 DOI: 10.1039/d2ra03579k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 08/15/2022] [Indexed: 11/21/2022] Open
Abstract
We report a one-pot two-step synthesis of a bioactive 6-amino-2-pyridone-3,5-dicarbonitrile derivative using natural product catalysts betaine and guanidine carbonate. Anti-cancer bioactivity was observed in specific molecules within the library of 16 derivatives. Out of the compounds, 5o had the most potent anti-cancer activity against glioblastoma cells and was selected for further study. Compound 5o showed anti-cancer properties against liver, breast, lung cancers as well as primary patient-derived glioblastoma cell lines. Furthermore, 5o in combination with specific clinically relevant small molecule inhibitors induced enhanced cytotoxicity in glioblastoma cells. Through our current work, we establish a promising 6-amino-2-pyridone-3,5-dicarbonitrile based lead compound with anti-cancer activity either on its own or in combination with specific clinically relevant small molecule kinase and proteasome inhibitors. The one-pot synthetic strategy of amino-pyridones with potent anti-cancer activity against breast, brain, liver, and lung cancer cells either alone or in combination with clinically relevant receptor tyrosine kinase and proteasome inhibitors.![]()
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Affiliation(s)
- Lynden G. Nicely
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Ruturajsinh M. Vala
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India
| | - Dipti B. Upadhyay
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India
| | - Joaquina Nogales
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Celestine Chi
- Department of Medical Biochemistry and Microbiology, Uppsala University, SE-75123 Uppsala, Sweden
| | - Sourav Banerjee
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Hitendra M. Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India
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Mahmoudi Z, Ghasemzadeh MA, Kabiri-Fard H, Taghvaei Ganjali S. Multicomponent Synthesis of Pyrimidoquinolinetriones and Pyridodipyrimidines in the Presence of Triethylenediamine-Based Ionic Liquid/MIL-101(Cr) Metal-Organic Framework Composite. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.2005638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Zohreh Mahmoudi
- Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Islamic Republic of Iran
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, Islamic Republic of Iran
| | | | - Hasan Kabiri-Fard
- Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Islamic Republic of Iran
| | - Saeed Taghvaei Ganjali
- Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Islamic Republic of Iran
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13
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Regioselective synthesis and theoretical calculations of Bis(pyrido[2′,3′:3,4]pyrazolo[1,5-a]pyrimidines) linked to benzofuran units via piperazine spacer: A DFT, MM2, and MMFF94 study. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130802] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Tamilselvi V, Lalitha A. Click Synthesis of Novel 3‐(2‐(2,4,5‐Triphenyl‐1
H
‐imidazol‐1‐yl)ethyl)‐1
H
‐indoles Catalyzed by Glacial Acetic Acid and their Antibacterial Evaluation. ChemistrySelect 2021. [DOI: 10.1002/slct.202100152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Agarwal M, Verma K, Kumar Tailor Y, Khandelwal S, Rushell E, Pathak S, Kumari Y, Awasthi K, Kumar M. Efficient and Sustainable Synthesis of Spiroannulated Hybrid Molecules with Privileged Substructures using Nanostructured Heterogeneous Catalyst. ChemistrySelect 2020. [DOI: 10.1002/slct.202003752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Monu Agarwal
- Department of Chemistry University of Rajasthan Jaipur India
| | - Kanchan Verma
- Department of Chemistry University of Rajasthan Jaipur India
| | | | | | - Esha Rushell
- Department of Chemistry University of Rajasthan Jaipur India
| | - Sakshi Pathak
- Department of Chemistry University of Rajasthan Jaipur India
| | - Yogita Kumari
- Soft Materials Lab, Department of Physics Malaviya National Institute of Technology Jaipur India
| | - Kamlendra Awasthi
- Soft Materials Lab, Department of Physics Malaviya National Institute of Technology Jaipur India
| | - Mahendra Kumar
- Department of Chemistry University of Rajasthan Jaipur India
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16
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Zhang K, Li J, Wang K, An X, Wang L. Atom‐economical Approaches to 1,5‐Benzodiazepines Containing Indole Ring via Fe
3
O
4
@SiO
2
‐PTSA‐catalyzed Multi‐component Domino Reactions. ChemistrySelect 2020. [DOI: 10.1002/slct.202003903] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- KaiYue Zhang
- Hebei Key Laboratory of Organic Functional Molecules College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei People's Republic of China
| | - Jing Li
- Hebei Key Laboratory of Organic Functional Molecules College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei People's Republic of China
| | - KaiXuan Wang
- Hebei Key Laboratory of Organic Functional Molecules College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei People's Republic of China
| | - Xiaoying An
- Hebei Key Laboratory of Organic Functional Molecules College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei People's Republic of China
| | - LanZhi Wang
- Hebei Key Laboratory of Organic Functional Molecules College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei People's Republic of China
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Sharma MG, Vala RM, Patel HM. Pyridine-2-carboxylic acid as an effectual catalyst for rapid multi-component synthesis of pyrazolo[3,4-b]quinolinones. RSC Adv 2020; 10:35499-35504. [PMID: 35515671 PMCID: PMC9056938 DOI: 10.1039/d0ra06738e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/19/2020] [Indexed: 01/31/2023] Open
Abstract
Green synthesis of pyrazolo[3,4-b]quinolinones was designed using bioproduct pyridine-2-carboxylic acid (P2CA) as a green and efficient catalyst. The multi-component reaction of aldehydes, 1,3-cyclodiones and 5-amino-1-phenyl-pyrazoles regioselectively produced pyrazolo[3,4-b]quinolinones in excellent yield (84–98%). Recyclization of the catalyst was also investigated. The electronic effect of the various substituents in aromatic rings indicated that the reaction proceeded through the carbocation intermediate. This newly designed protocol very quickly constructed products conventionally under milder conditions. Green synthesis of pyrazolo[3,4-b]quinolinones was designed using bioproduct pyridine-2-carboxylic acid (P2CA) as a green and efficient catalyst.![]()
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