1
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Ahmed K, Choudhary MI, Saleem RSZ. Heterocyclic pyrimidine derivatives as promising antibacterial agents. Eur J Med Chem 2023; 259:115701. [PMID: 37591149 DOI: 10.1016/j.ejmech.2023.115701] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/18/2023] [Accepted: 07/29/2023] [Indexed: 08/19/2023]
Abstract
Antibiotic resistance is a growing public health concern. The quest to understand the underlying mechanisms of drug resistance needs to be accompanied by an expanded arsenal of drugs. This calls for the development of new compounds with anti-bacterial properties. The ease of functionalization of the pyrimidine core, to produce structurally distinct compound libraries, has made pyrimidine a privileged structure for identifying anti-bacterial hits. The activity of pyrimidine derivatives can be attributed to the various subunits linked with the main core, especially at C-2 or C-4 or C-6. Particularly, presence of NH2 attached to C-2 of the pyrimidine nucleus has been shown to enhance the anti-bacterial activity against pathogenic Gram-positive and Gram-negative bacteria. The diversity of synthetic routes used for the synthesis of such compounds, the reported biological activities, and a growing need to develop novel anti-bacterial agents warrant a review that presents recent reports on the synthesis and anti-bacterial activities of pyrimidine-containing compounds.
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Affiliation(s)
- Kainat Ahmed
- Department of Chemistry and Chemical Engineering, SBASSE, Lahore University of Management Sciences, Sector-U, DHA, Lahore, 54792, Pakistan
| | - M Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Rahman Shah Zaib Saleem
- Department of Chemistry and Chemical Engineering, SBASSE, Lahore University of Management Sciences, Sector-U, DHA, Lahore, 54792, Pakistan.
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2
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Chen L, Liang W. Phase-transfer catalyzed Michael/ammonolysis cascade reactions of enaminones and olefinic azlactones: a new approach to structurally diverse quinoline-2,5-diones. Org Biomol Chem 2022; 20:3201-3210. [PMID: 35352072 DOI: 10.1039/d2ob00096b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Michael/ammonolysis cascade reactions between cyclohexane-1,3-dione-derived enaminones and olefinic azlactones via phase-transfer catalysis have been developed. This method provides rapid access to a suite of architecturally complex and diverse quinoline-2,5-diones bearing a secondary amide group at the C-3 position in moderate to excellent yields (53-94%) and with excellent diastereoselectivities (>99 : 1 dr in most cases). The achievement of a preparative-scale reaction and the diverse product derivatization that can be obtained highlight the application potential of this protocol both in academic and industrial settings. An investigation of the reaction mechanism implies that tetrabutylammonium hydroxide may be the actual catalyst during this cascade reaction.
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Affiliation(s)
- Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. of China.
| | - Wei Liang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. of China.
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3
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Karati D, Mahadik KR, Trivedi P, Kumar D. A Molecular Insight into Pyrazole Congeners as Antimicrobial, Anticancer, and Antimalarial Agents. Med Chem 2022; 18:1044-1059. [PMID: 35240964 DOI: 10.2174/1573406418666220303150640] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/08/2021] [Accepted: 12/23/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Pyrazole is a bioactive heterocyclic congener found in a wide range of biological and pharmacological applications. Due to their multiple prospective uses, developing innovative pyrazoles and analogues, disclosing revolutionary ways for synthesizing this nucleus, investigating diverse potencies of that heterocycle, and seeking for possible applications of pyrazoles are all growing more significant Objectives: Pyrazole scaffolds have been proven to be successful as antimicrobial, anticancer, antimalarial therapeutic against multiple targets like DNA gyrase, topoisomerase IV, Hsp90, and several kinase enzymes. Its moiety has absorbed the attention of many scientists to research chemical and pharmacological profile due to this miscellany in the biotic region. RESULTS The review covers pyrazole scaffolds with a variety of biological functions, as well as attempts to connect the structure-activity relationship. Multiple pyrazole analogues have been produced as lead compounds, and their activities have been evaluated. CONCLUSION The combination of pyrazole with other pharmacophores in a molecule might lead to novel potent therapeutic medicines, which could aid in the development of potent lead compounds.
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Affiliation(s)
- Dipanjan Karati
- Poona College of Pharmacy, Department of Pharmaceutical Chemistry, Bharati Vidyapeeth (Deemed to be University), Erandwane, Pune- 411038, Maharashtra, India
| | - Kakasaheb Ramoo Mahadik
- Poona College of Pharmacy, Department of Pharmaceutical Chemistry, Bharati Vidyapeeth (Deemed to be University), Erandwane, Pune- 411038, Maharashtra, India
| | - Piyush Trivedi
- Hon. Director, Center of Innovation and Translational Research, Poona College of Pharmacy, Bhartiya Vidyapeeth, Pune 411038, India
| | - Dileep Kumar
- Poona College of Pharmacy, Department of Pharmaceutical Chemistry, Bharati Vidyapeeth (Deemed to be University), Erandwane, Pune- 411038, Maharashtra, India
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4
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Alavi SJ, Zebarjadi A, Bafghi MH, Orafai H, Sadeghian H. O-prenylated carbostyrils as a novel class of 15-lipoxygenase inhibitors: Synthesis, characterization, and inhibitory assessment. Chem Biol Drug Des 2021; 98:894-902. [PMID: 34453501 DOI: 10.1111/cbdd.13944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/24/2021] [Accepted: 08/16/2021] [Indexed: 11/28/2022]
Abstract
Catalyzed peroxidation of unsaturated lipid in animals and plants intimately is linked to the activity of 15-Lipoxygenase enzymes. Lipoxygenases (LOXs) are well known to play an important role in many acute and chronic syndromes such as inflammation, asthma, cancer, and allergy. In this study, a series of mono prenyloxycarbostyrils were synthesized and evaluated as potential inhibitors of soybean 15-Lipoxygenase (SLO) and their inhibitory potencies were compared to mono prenyloxycoumarins which had been reported in the previous works. The synthetic compounds inhibit lipoxygenase enzyme by competitive mechanism like the prenyloxy coumarins. The results showed that position and length of the prenyl moiety play the important role in lipoxygenase inhibitory activity. Among all of the synthetic compounds (coumarin and carbostyril derivatives), 5-farnesyloxycoumarin and 8-farnesyloxycarbostyril demonstrated the best inhibitory activity by IC50 values of 1.1 µM and 0.53 µM, respectively.
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Affiliation(s)
- Seyed Jamal Alavi
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Zebarjadi
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahdi Hosseini Bafghi
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Orafai
- Department of Pharmaceutics, Faculty of Pharmacy, University of Al-Zahraa for Women, Karbala, Iraq
| | - Hamid Sadeghian
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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5
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Sabahi-Agabager L, Eskandari H, Nasiri F, Shamkhali AN, Baghi Sefidan S. Properties of a furan ring-opening reaction in aqueous micellar solutions for selective sensing of mesalazine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 258:119846. [PMID: 33933944 DOI: 10.1016/j.saa.2021.119846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/26/2021] [Accepted: 04/13/2021] [Indexed: 06/12/2023]
Abstract
A novel and efficient non-azo formation based method was developed for trace sensing of mesalazine (MES), a pharmaceutical aromatic amine. MES was simply coupled with a Meldrum's activated furan (MAF) reagent via a furan ring opening reaction to form a colored product. The intense purple colored solution was detected at 575 nm. The reaction of MES with MAF was monitored by employing 1H NMR spectroscopy and mass spectrometry. In addition, density functional theory (DFT) was applied to optimize the structure of the colored product and its λmax (the wavelength of maximum absorbance) in dimethyl sulfoxide and water. The colored product was considered in three possible structures, and the most possible structures in dimethyl sulfoxide and in water were identified by employing the DFT calculations. Both of the most possible structures indicated only a local excitation in their λmax and no charge transfer was observed. However, one of the structures in dimethyl sulfoxide presented charge transfer properties occurring through NCCC moiety. A univariate optimization method was also used to attain the optimum condition for analysis. In addition, the dependence of the analytical response on the three main affecting parameters (reaction time (X1), Triton X-100 concentration (X2) and MAF concentration (X3)) was identified by employing a central composite design (CCD) approach. The CCD study showed that the analytical response depends complexly on the parameters. Beer's law was obeyed within the range of 0.06-9.30 μg mL-1 of MES (155 fold linearity) at 575 nm, under the optimum condition introduced by the CCD approach. Also, the limit of detection was obtained 0.04 μg mL-1 of MES. The method showed precision (as relative standard deviation) and accuracy (as recovery) within the ranges of 0.6-3.2 % and 96.3-100.8%, respectively. Various organic and inorganic species, amino-pharmaceuticals, and amino acids were tested to evaluate the selectivity of the method. The selectivity of the analytical method was satisfactory. The method was successfully applied for detection of MES in various water matrices and pharmaceutical tablets.
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Affiliation(s)
- Leila Sabahi-Agabager
- Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
| | - Habibollah Eskandari
- Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran.
| | - Farough Nasiri
- Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
| | - Amir Nasser Shamkhali
- Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
| | - Somayyeh Baghi Sefidan
- Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
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6
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Abstract
A new fluorinated pyrazole, 5-(4-fluorophenyl)-3-(naphthalen-1-yl)-1-phenyl-1H-pyrazole was successfully synthesized via a two-step reaction. Firstly, the synthesis of pyrazoline was performed via one-pot three-component reaction under microwave irradiation. Secondly, the synthesis of pyrazole was performed via oxidative aromatization of pyrazoline under conventional heating. The structure of the synthesized compound was confirmed by spectroscopic analysis, including FT-IR, HR-MS, 1D and 2D NMR analysis. Then, molecular docking study showed that the binding affinity of the synthesized compound to human estrogen alpha receptor (ERα) was close to 4-OHT as a native ligand.
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Abstract
This review article represents a survey of the synthetic strategies leading to pyrazolyl quinolines.
The synthetic methods are divided into two main groups based on the type of starting reagents: 1)
From quinoline ring onto a pyrazole scaffold, 2) From pyrazole ring onto a quinoline scaffold. Also,
some medical applications of pyrazolyl quinoline derivatives are mentioned such as anticancer, cell proliferative
disorder, glucose transport inhibitors, anti-inflammatory, and inhibitors of leukotriene production
for the treatment of cardiovascular. The main purpose of this review is to present a survey of the
literature on the synthetic approaches of pyrazolyl quinolines and provide useful and up-to-date data for
organic and medicinal chemist since such compound has not been previously reviewed.
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Affiliation(s)
- Rizk E. Khidre
- Chemistry Department, Faculty of Science, Jazan University, Jazan, Saudi Arabia
| | | | - Diaa A. Ibrahim
- Chemistry Department, Faculty of Science, Jazan University, Jazan, Saudi Arabia
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8
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Abstract
4-Formylpyrazoles are useful building blocks in organic synthesis. This review focuses on the applications of 4-formylpyrazoles to generate a large variety of organic compounds and heterocycles such as Schiff bases, pyrazolylpyrazolines, pyrazoloquinolinones, 4H-pyrazolopyran, pyrazolylbenzoxazole, pyrazolothiadiazepines, pyrazolyloxazolone, pyrazolyloxadiazolines, pyrazolylthiadiazolines, imidazolylpyrazoles, pyrazolopyridines, chromenopyrazolones, thiopyranothiazolylpyrazoles and many others. Many of these molecules exhibit excellent biological activities.
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Affiliation(s)
- Renu Bala
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Baru Sahib, District Sirmour, H.P.- 173101, India
| | - Poonam Kumari
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Baru Sahib, District Sirmour, H.P.- 173101, India
| | - Sumit Sood
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Baru Sahib, District Sirmour, H.P.- 173101, India
| | - Karan Singh
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Baru Sahib, District Sirmour, H.P.- 173101, India
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9
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Bala R, Kumari P, Sood S, Kumar V, Singh N, Singh K. Phthaloyl Dichloride-DMF Mediated Synthesis of Benzothiazole-based 4-Formylpyrazole Derivatives: Studies on Their Antimicrobial and Antioxidant Activities. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3282] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Renu Bala
- Department of Chemistry, Akal College of Basic Sciences; Eternal University; Baru Sahib, Sirmour Himachal Pradesh 173101 India
| | - Poonam Kumari
- Department of Chemistry, Akal College of Basic Sciences; Eternal University; Baru Sahib, Sirmour Himachal Pradesh 173101 India
| | - Sumit Sood
- Department of Chemistry, Akal College of Basic Sciences; Eternal University; Baru Sahib, Sirmour Himachal Pradesh 173101 India
| | - Vinod Kumar
- Department of Biochemistry, College of Agriculture; Agriculture University, Jodhpur; Rajasthan 342304 India
| | - Nasib Singh
- Department of Microbiology, Akal College of Basic Sciences; Eternal University; Baru Sahib, Sirmour Himachal Pradesh 173101 India
| | - Karan Singh
- Department of Chemistry, Akal College of Basic Sciences; Eternal University; Baru Sahib, Sirmour Himachal Pradesh 173101 India
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10
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Synthesis, biological screening, POM, and 3D-QSAR analyses of some novel pyrazolic compounds. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1888-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Nassar IF, El Farargy AF, Abdelrazek FM, Ismail NSM. Design, synthesis and anticancer evaluation of novel pyrazole, pyrazolo[3,4-d]pyrimidine and their glycoside derivatives. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2017; 36:275-291. [PMID: 28323527 DOI: 10.1080/15257770.2016.1276290] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The chalcone derivatives 3a,b were cyclized upon reaction with thiourea to give the pyrazolo[3,4-d]pyrimidine derivatives 5a,b. Condensation of 5a,b and their hydrazide derivatives 8a,b with cyclic and acyclic glucose gave the condensed S- and N-glycosides 7a,b and 9a,b, respectively. Reaction of 3b with ethyl cyanoacetate followed by reaction with cyclic glucose afforded a mixture of the O- and/or N-glycoside isomers 12 and 13, respectively. The pyrazolo[3,4-c]pyrazole derivative 14 was also obtained from the reaction of 3b with hydrazine hydrate. A number of the synthesized compounds were screened for their antitumor activity against three different tumor cell lines HEPG2 (liver), HCT116 (colon) and MCF-7 (breast) with a docking study against CDK2.
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Affiliation(s)
- Ibrahim F Nassar
- a Faculty of Specific Education, Ain Shams University , Abassia , Cairo , Egypt
| | - Ahmed F El Farargy
- b Department of Chemistry , Faculty of Science, Zagazig University , Zagazig , Egypt
| | - Fathy M Abdelrazek
- c Department of Chemistry , Faculty of Science, Cairo University , Giza , Egypt
| | - Nasser S M Ismail
- d Pharmaceutical Chemistry Department , Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University , Cairo , Egypt
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12
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Abdu T, Adnan AB, Yimer S. Screening of some pyrazole derivatives as promising antileishmanial agent. ACTA ACUST UNITED AC 2017. [DOI: 10.5897/ajpp2016.4401] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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13
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Muthineni N, Satish Kumar N, Chandrasekhara Rao L, Dileep Kumar V, Misra S, Raju Chowhan L, Meshram HM. An Efficient Four-Component Approach for the Synthesis of Novel 5-Methyl-4-(2-(3-methyl-4-nitroisoxazol-5-yl)- 1-arylethyl)-1H-pyrazol-3-ol Derivatives and their Antibacterial Study. ChemistrySelect 2016. [DOI: 10.1002/slct.201600915] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Narmada Muthineni
- Medicinal Chemistry and Pharmacology Division; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - Nandigama Satish Kumar
- Medicinal Chemistry and Pharmacology Division; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - L. Chandrasekhara Rao
- Medicinal Chemistry and Pharmacology Division; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - V. Dileep Kumar
- Biology Division; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - Sunil Misra
- Biology Division; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - L. Raju Chowhan
- School of Chemical Sciences; Central University of Gujarat; Gandhinagar- 38203
| | - H. M. Meshram
- Medicinal Chemistry and Pharmacology Division; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500007 India
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14
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Nassar IF, Atta-Allah SR, Elgazwy ASSH. A convenient synthesis and molecular modeling study of novel pyrazolo[3,4-d]pyrimidine and pyrazole derivatives as anti-tumor agents. J Enzyme Inhib Med Chem 2014; 30:396-405. [PMID: 25068728 DOI: 10.3109/14756366.2014.940936] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
An efficient method to obtain ethyl 5-amino-1-tosyl-1H-pyrazole-4-carboxylate (3) was outlined using condensation reactions of 4-methylbenzenesulfonylhydrazide with (E)-ethyl 2-cyano-3-ethoxyacrylate. The cyclocondensation reaction of this substrate and its hydrazide derivative with urea, thiourea, formamide, formic acid, d-glucose, o-phenylenediamine, 4-dimethylaminobenzaldehyde, anthracene-9-carbaldehyde, thioglycolic acid and carbon disulphide then with hydrazine hydrate analogues furnished a series of pyrazolo[3,4-d]pyrimidine, pyrazolo[3,4-d]oxazin-4-one, pyrazole-4-glucoside, 4-benzo[d]imidazole, 1,3-thiazolidinone, 1,3,4-oxadiazol-2(3H)-thione and 1,2,4-triazol-5(4H)-thione derivatives respectively. The structure of the compound 3 was supported by X-Ray crystallographic data. Orally administrated, one of each of the series of pyrazoles showed significant effects in mouse tumor model cancer cell lines (EAC) and two human cancer cell lines of Colon cancer (HCT-29) and Breast cancer (MCF-7) with docking studies.
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Affiliation(s)
- Ibrahim F Nassar
- Faculty of Specific Education, Ain Shams University (ASU) , Abbassia, Cairo , Egypt and
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15
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Ghorab MM, El-Gazzar MG, Alsaid MS. Synthesis and anti-breast cancer evaluation of novel N-(guanidinyl)benzenesulfonamides. Int J Mol Sci 2014; 15:5582-95. [PMID: 24694543 PMCID: PMC4013583 DOI: 10.3390/ijms15045582] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 03/19/2014] [Accepted: 03/20/2014] [Indexed: 11/18/2022] Open
Abstract
A series of 4-(substituted)-N-(guanidinyl)benzenesulfonamides bearing biologically active pyrazole, pyrimidine and pyridine moieties were prepared and evaluated for their anticancer activity against human tumor breast cell line (MCF7). These sulfonamides showed promising activity with IC50 values ranging from 49.5 to 70.2 μM. The structure-activity relationship of the synthesized compounds was studied. Interestingly, it was found that the most potent compounds in this study were the corresponding 2-cyanoacrylate 3, 3-oxobutanoate 4, pyrazole 6, pyridine 9 and pyrazole 13. Compounds 7 and 8 are nearly as active as Doxorubicin as reference drug with (IC50 values=70.2, 68.1 μM), while compounds 5, 10 and 11 exhibited a moderate activity.
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Affiliation(s)
- Mostafa M Ghorab
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
| | - Marwa G El-Gazzar
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Nasr City, Cairo 11371, Egypt.
| | - Mansour S Alsaid
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
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16
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Sangani CB, Shah NM, Patel MP, Patel RG. Microwave-assisted synthesis of novel 4H-chromene derivatives bearing 2-aryloxyquinoline and their antimicrobial activity assessment. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0381-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Abdel-Aziz HA, Ghabbour HA, Chantrapromma S, Fun HK. 3-Acetyl-1,5-diphenyl-1H-pyrazole-4-carbonitrile. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1095-6. [PMID: 22589957 PMCID: PMC3344048 DOI: 10.1107/s1600536812010938] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 03/13/2012] [Indexed: 11/22/2022]
Abstract
The title compound, C18H13N3O, has a butterfly-like structure, in which the pyrazole ring forms dihedral angles of 59.31 (8) and 57.24 (8)° with the two phenyl rings. The dihedral angle between the two phenyl rings is 64.03 (8)°. The pyrazole ring and the C—C=O plane of the acetyl group are twisted slightly, making a dihedral angle of 7.95 (18)°. In the crystal, molecules are linked through weak C—H⋯N and C—H⋯O interactions into a helical chain along the a-axis direction.
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18
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Abdel-Aziz HA, Al-Rashood KA, Ghabbour HA, Chantrapromma S, Fun HK. 5,6-Dimethyl-4-(thio-phen-2-yl)-1H-pyrazolo-[3,4-b]pyridin-3-amine. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o612-3. [PMID: 22412524 PMCID: PMC3295413 DOI: 10.1107/s1600536812004126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 01/31/2012] [Indexed: 12/02/2022]
Abstract
In the title mol-ecule, C(12)H(12)N(4)S, the thio-phene ring is disordered over two orientations with a refined site-occupancy ratio of 0.777 (4):0.223 (4). The pyrazolo-pyridine ring system is essentially planar with an r.m.s. deviation of 0.0069 (3) Å and makes dihedral angles of 82.8 (2) and 72.6 (5)°, respectively, with the major and minor components of the thio-phene ring. In the crystal, mol-ecules are linked into a chain along the a axis by a pair of N-H⋯N(pyrazole) hydrogen bonds and a pair of N-H⋯N(pyridine) hydrogen bonds, both having a centrosymmetric R(2) (2)(8) graph-set motif. A C-H⋯π inter-action is also present.
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Affiliation(s)
- Hatem A. Abdel-Aziz
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
| | - Khalid A. Al-Rashood
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
| | - Hazem A. Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
| | - Suchada Chantrapromma
- Crystal Materials Research Unit, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
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19
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Microwave-assisted synthesis of 3′-indolyl substituted 4H-chromenes catalyzed by DMAP and their antimicrobial activity. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9861-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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