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Mahnashi M, Alshahrani MM, Al Ali A, Asiri A, Abou-Salim MA. Novel Glu-based pyrazolo[3,4-d]pyrimidine analogues: design, synthesis and biological evaluation as DHFR and TS dual inhibitors. J Enzyme Inhib Med Chem 2023; 38:2203879. [PMID: 37080777 PMCID: PMC10120551 DOI: 10.1080/14756366.2023.2203879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023] Open
Abstract
A novel series of multifunctional pyrazolo[3,4-d]pyrimidine-based glutamate analogs (6a-l and 7a,b) have been designed and synthesized as antifolate anticancer agents. Among the tested compounds, 6i exhibited the most potent anti-proliferative activity towards NSCLC, CNS, Ovarian, Prostate, Colon, Melanoma, Breast, and Renal cancers with good to weak cytostatic activity and non-lethal actions. 6i demonstrated higher selectivity for cancer than normal cells. 6i could significantly increase the accumulation of S-phase cells during the cell cycle distribution of cancer cells with high potency in the induction of apoptosis. The results unveiled that 6i probably acts through dual inhibition of DHFR and TS enzymes (IC50 = 2.41 and 8.88 µM, correspondingly). Docking studies of 6i displayed that N1-p-bromophenyl and C3-Methyl groups participate in substantial hydrophobic interactions. The drug-likeness features inferred that 6i met the acceptance criteria of Pfizer. Taking together, 6i could be a promising prototype for further optimization as an effective anticancer drug.
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Affiliation(s)
- Mater Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Mohammed Merae Alshahrani
- Department of Clinical Laboratory Sciences, Faculty of Applied Medical Sciences, Najran University, Najran, Saudi Arabia
| | - Amer Al Ali
- Department of Clinical Laboratory Sciences, Faculty of Applied Medical Sciences, University of Bisha, Bisha, Saudi Arabia
| | - Abdulaziz Asiri
- Department of Clinical Laboratory Sciences, Faculty of Applied Medical Sciences, University of Bisha, Bisha, Saudi Arabia
| | - Mahrous A Abou-Salim
- Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
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2
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Dvorácskó S, Dimmito MP, Sebastiani J, La Regina G, Silvestri R, Pieretti S, Stefanucci A, Tömböly C, Mollica A. Rimonabant-Based Compounds Bearing Hydrophobic Amino Acid Derivatives as Cannabinoid Receptor Subtype 1 Ligands. ACS Med Chem Lett 2023; 14:479-486. [PMID: 37077391 PMCID: PMC10108392 DOI: 10.1021/acsmedchemlett.3c00024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 02/24/2023] [Indexed: 03/11/2023] Open
Abstract
In this study, 1H-pyrazole-3-carboxylic acids related to the cannabinoid type 1 (CB1) receptor antagonist rimonabant were amidated with valine or tert-leucine, and the resulting acids were further diversified as methyl esters, amides, and N-methyl amides. In vitro receptor binding and functional assays demonstrated a wide series of activities related to the CB1 receptors (CB1Rs). Compound 34 showed a high CB1R binding affinity (K i = 6.9 nM) and agonist activity (EC50 = 46 nM; E max = 135%). Radioligand binding and [35S]GTPγS binding assays also demonstrated its selectivity and specificity to CB1Rs. Moreover, in vivo experiments revealed that 34 was slightly more effective than the CB1 agonist WIN55,212-2 in the early phase of the formalin test, indicating a short duration of the analgesic effect. Interestingly, in a mouse model of zymosan-induced hindlimb edema, 34 was able to maintain the percentage of paw volume below 75% for 24 h following subcutaneous injection. After intraperitoneal administration, 34 increased the food intake of mice, suggesting potential activity on CB1Rs.
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Affiliation(s)
- Szabolcs Dvorácskó
- Laboratory of Chemical Biology, Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, 6726 Szeged, Hungary
- Department of Medicinal Chemistry, University of Szeged, 6720 Szeged, Hungary
| | - Marilisa Pia Dimmito
- Department of Pharmacy, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Jessica Sebastiani
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Giuseppe La Regina
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Romano Silvestri
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Stefano Pieretti
- National Centre for Drug Research and Evaluation, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - Azzurra Stefanucci
- Department of Pharmacy, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Csaba Tömböly
- Laboratory of Chemical Biology, Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, 6726 Szeged, Hungary
| | - Adriano Mollica
- Department of Pharmacy, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
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3
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Optimization of Pyrazole Compounds as Antibiotic Adjuvants Active against Colistin- and Carbapenem-Resistant Acinetobacter baumannii. Antibiotics (Basel) 2022; 11:antibiotics11121832. [PMID: 36551489 PMCID: PMC9774939 DOI: 10.3390/antibiotics11121832] [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: 11/04/2022] [Revised: 12/01/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
The diffusion of antibiotic-resistant, Gram-negative, opportunistic pathogens, an increasingly important global public health issue, causes a significant socioeconomic burden. Acinetobacter baumannii isolates, despite causing a lower number of infections than Enterobacterales, often show multidrug-resistant phenotypes. Carbapenem resistance is also rather common, prompting the WHO to include carbapenem-resistant A. baumannii as a "critical priority" for the discovery and development of new antibacterial agents. In a previous work, we identified several series of compounds showing either direct-acting or synergistic activity against relevant Gram-negative species, including A. baumannii. Among these, two pyrazole compounds, despite being devoid of any direct-acting activity, showed remarkable synergistic activity in the presence of a subinhibitory concentration of colistin on K. pneumoniae and A. baumannii and served as a starting point for the synthesis of new analogues. In this work, a new series of 47 pyrazole compounds was synthesized. Some compounds showed significant direct-acting antibacterial activity on Gram-positive organisms. Furthermore, an evaluation of their activity as potential antibiotic adjuvants allowed for the identification of two highly active compounds on MDR Acinetobacter baumannii, including colistin-resistant isolates. This work confirms the interest in pyrazole amides as a starting point for the optimization of synergistic antibacterial compounds active on antibiotic-resistant, Gram-negative pathogens.
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Uygun MT, Amudi K, Turaçlı İD, Menges N. A new synthetic approach for pyrazolo[1,5-a]pyrazine-4(5H)-one derivatives and their antiproliferative effects on lung adenocarcinoma cell line. Mol Divers 2021; 26:113-124. [PMID: 33387184 DOI: 10.1007/s11030-020-10161-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/20/2020] [Indexed: 01/26/2023]
Abstract
Starting from the 3,5-dimethyl pyrazole ring and acetophenone derivatives, five different N-propargylated C-3 substituted pyrazoles were obtained. These derivatives were reacted with different amine derivatives using Cs2CO3 in methanol and 11 different pyrazolo [1,5-a] pyrazine-4(5H)-one derivatives were obtained, which are not found in the literature. The cytotoxic effects of these derivatives in the A549 cell line were investigated. The 160 µM concentration of two derivatives was found to increase cell death rate to 50%, and two derivatives increased cell death rate by up to 40%. The structure-activity relationship (SAR) study revealed an amide group with a long alkyl chain and benzene ring with a p-CF3 group could be important for efficiency. With theoretical ADMET studies of pyrazolopyrazine derivatives, pharmacokinetic phases were predicted to be suitable.
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Affiliation(s)
- Meltem Tan Uygun
- Pharmaceutical Chemistry Section, Van Yuzuncu Yil University, 65080, Van, Turkey.,SAFF Chemical Reagent RδD Laboratory, VAN-TEKNOKENT, 65080, Van, Turkey
| | - Karina Amudi
- Pharmaceutical Chemistry Section, Van Yuzuncu Yil University, 65080, Van, Turkey.,SAFF Chemical Reagent RδD Laboratory, VAN-TEKNOKENT, 65080, Van, Turkey
| | - İrem Doğan Turaçlı
- Department of Medical Biology, Faculty of Medicine, Ufuk University, 06520, Ankara, Turkey
| | - Nurettin Menges
- Pharmaceutical Chemistry Section, Van Yuzuncu Yil University, 65080, Van, Turkey. .,SAFF Chemical Reagent RδD Laboratory, VAN-TEKNOKENT, 65080, Van, Turkey.
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5
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Said AI, Palkó M, Haukka M, Fülöp F. Angular Regioselectivity in the Reactions of 2-Thioxopyrimidin-4-ones and Hydrazonoyl Chlorides: Synthesis of Novel Stereoisomeric Octahydro[1,2,4]triazolo[4,3- a]quinazolin-5-ones. Molecules 2020; 25:E5673. [PMID: 33271898 PMCID: PMC7730367 DOI: 10.3390/molecules25235673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/25/2020] [Accepted: 11/27/2020] [Indexed: 11/16/2022] Open
Abstract
The regioselective synthesis of cis and trans stereoisomers of variously functionalized octahydro[1,2,4]triazolo[4,3-a]quinazolin-5-ones was performed. The 2-thioxopyrimidin-4-ones used in the synthesis reacted with hydrazonoyl chlorides in a regioselective manner to produce the angular regioisomers [1,2,4]triazolo[4,3-a]quinazolin-5-ones rather than the linear isomers [1,2,4]triazolo[4,3-a]quinazolin-5-ones. The synthesis process took place with electronic control. The angular regiochemistry of the products was confirmed by X-ray experiments and two-dimensional NMR studies.
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Affiliation(s)
- Awad I. Said
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (A.I.S.); (F.F.)
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Márta Palkó
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (A.I.S.); (F.F.)
- Interdisciplinary Excellence Center, Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Matti Haukka
- Department of Chemistry, University of Jyväskulä, FIN-40014 Jyväskulä, Finland;
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (A.I.S.); (F.F.)
- Interdisciplinary Excellence Center, Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Hungary
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6
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Said AI, Haukka M, Fülöp F. Microwave-Assisted Regioselective Synthesis of Variously Functionalized [1,2,4]triazolo[3,4-b]quinazolin-5(1H)-ones. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200814134911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
[1,2,4]Triazolo[3,4-b]quinazolin-5(1H)-ones with varied functionalization patterns
were synthesized in a regioselective manner by reacting 2-thioxo-2,3-
dihydroquinazolin-4(1H)-one (2) with variously functionalized hydrazonoyl chlorides (3ah).
Linear regioselectivity of the formed products was confirmed by X-ray measurements.
Under microwave conditions, the reactions were completed in a few minutes without a
change in the regioselectivity.
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Affiliation(s)
- Awad I. Said
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
| | - Matti Haukka
- Department of Chemistry, University of Jyvaskula, Jyvaskula, Finland
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
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7
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Li SM, Tsai SE, Chiang CY, Chung CY, Chuang TJ, Tseng CC, Jiang WP, Huang GJ, Lin CY, Yang YC, Fuh MT, Wong FF. New methyl 5-(halomethyl)-1-aryl-1H-1,2,4-triazole-3-carboxylates as selective COX-2 inhibitors and anti-inflammatory agents: Design, synthesis, biological evaluation, and docking study. Bioorg Chem 2020; 104:104333. [PMID: 33142408 DOI: 10.1016/j.bioorg.2020.104333] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 09/29/2020] [Indexed: 02/06/2023]
Abstract
A new method was developed for synthesis of 1,2,4-triazole-3-carboxylates 5a-p and 6 from nitrilimines 3a-p through amination and heterocyclization two-steps reactions. All of 1,2,4-triazole-3-carboxylates 5 and 6 were characterized by spectroscopy technique. Based on the SAR study of anti-inflammation activity, most of these compounds showed potential anti-inflammatory activity on NO inhibition in LPS-induced RAW 264.7 cells (IC50 < 7.0 µM) compared with Celecoxib and Indomethacin. Several potential compounds 5b-h, 5j, 5l, 5n, and 5o were subjected to in vitro cyclooxygenase COX-1/COX-2 inhibition assays. Compound 5d showed extraordinary COX-2 inhibition (IC50 = 17.9 nM) and the best selectivity (COX-1/COX-2 = 1080). Furthermore, 5 mg/kg compound 5d exhibited better in vivo anti-inflammation and gastric protection results compared to 10 mg/kg Indomethacin. Docking experiments of 5d into COX-2 binding pocket have been evaluated. Following the bioactivities experimental data, the potential drug candidate 5d, significantly exhibited better anti-inflammatory effect than Indomethacin.
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Affiliation(s)
- Sin-Min Li
- Institute of New Drug Development, China Medical University, No. 91 Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Shuo-En Tsai
- Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Chia-Yin Chiang
- Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Cheng-Yen Chung
- Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan; School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Tsung-Jui Chuang
- Master Program for Pharmaceutical Manufacture, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Ching-Chun Tseng
- Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Wen-Ping Jiang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Guan-Jhong Huang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Chin-Yu Lin
- Institute of New Drug Development, China Medical University, No. 91 Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Ya-Chen Yang
- Department of Food Nutrition and Health Biotechnology, Asia University, Taichung 41354, Taiwan
| | - Mao-Tsu Fuh
- Division of Metabolism, Department of Internal Medicine, China Medical University, Taichung 40402, Taiwan
| | - Fung-Fuh Wong
- Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan; School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan.
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8
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Tsai SE, Li SM, Tseng CC, Chung CY, Zeng YH, Chieh Lin C, Fuh MT, Yang LC, Yang YC, Wong FF. Chlorotrimethylsilane promoted one-flask heterocyclic synthesis of 1,2,4-triazoles from nitrilimines: Modeling studies and bioactivity evaluation of LH-21 and Rimonabant analogues. Bioorg Chem 2020; 104:104299. [PMID: 33002729 DOI: 10.1016/j.bioorg.2020.104299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 11/24/2022]
Abstract
An efficient one-flask cascade method for synthesis of the multi-substituted 1,2,4-triazoles via chlorotrimethylsilane as a promoter was developed. Firstly, nitrilimines were transformed to hydrazonamides as intermediate in high yield by treatment with commercially available hexamethyldisilazane. Subsequently, the mixture was added with corresponding acyl chloride and heated in the presence of pyridine to give the corresponding multi-substituted 1,2,4-triazoles via chlorotrimethylsilane promoted heterocyclization reaction. The utility of method was demonstrated to synthesize CB1 ligands including Rimonabant analogue 4c and LH-21 3 for modeling study. All synthesized compounds were subjected to the cAMP functional assay of CB1/CB2 receptor. Especially, compound 4g enhanced the reversal of cAMP reduction by CP59440 than LH-21 and Rimonabant analogue in CHO-hCB1 cells. In addition, the docking results showed compound 4g fits the best position with CB1 receptor. However, the ability to penetrate brain-blood barrier of compound 4g is similar with Rimonabant in MDCK-mdr1 permeability assay, which might cause CNS side effect. This study still provides the basis for further development of a potent and specific CB1 antagonist.
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Affiliation(s)
- Shuo-En Tsai
- School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan; Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Sin-Min Li
- Institute of New Drug Development, China Medical University, No. 91 Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Ching-Chun Tseng
- School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan; Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Cheng-Yen Chung
- School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan; Ph.D. Program for Biotech Pharmaceutical Industry, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Yu-Hui Zeng
- Master Program for Pharmaceutical Manufacture, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Chun Chieh Lin
- School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Mao-Tsu Fuh
- Division of Metabolism, Department of Internal Medicine, China Medical University, Taichung 40402, Taiwan
| | - Li-Chan Yang
- School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Ya-Chen Yang
- Department of Food Nutrition and Health Biotechnology, Asia University, No. 500, Liufeng Rd., Wufeng Dist., Taichung City 413, Taiwan
| | - Fung-Fuh Wong
- School of Pharmacy, China Medical University, No. 91, Hsueh-Shih Rd., Taichung 40402, Taiwan.
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9
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Said AI, Palkó M, Haukka M, Fülöp F. Retro Diels Alder protocol for regioselective synthesis of novel [1,2,4]triazolo[4,3- a]pyrimidin-7(1 H)-ones. RSC Adv 2020; 10:33937-33943. [PMID: 35519032 PMCID: PMC9056728 DOI: 10.1039/d0ra04345a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 08/12/2020] [Indexed: 11/21/2022] Open
Abstract
Reactions of diastereochemically varied norbornene-condensed 2-thioxopyrimidin-4-ones 6 and 10 with variously functionalized hydrazonoyl chlorides 2a-h gave regioselectively angular norbornene-based [1,2,4]triazolo[4,3-a]pyrimidin-7(1H)-ones 7a-h and 11a,c-e, respectively. Thermal retro Diels-Alder (RDA) reaction of 7a-h and 11a,c-e resulted in the target compounds 4a-h as single products. On the other hand, reactions of thiouracil 1 and hydrozonoyl chlorides 2a-e gave regioselectively [1,2,4]triazolo[4,3-a]pyrimidinone-5(1H)-ones 3a-e. The opposite regioselectivity of thiouracil 1 and norbornene-condensed 2-thioxopyrimidin-4-ones 6 and 10 was attributed to electronic factors according to DFT calculations. The angular structure of norbornene based [1,2,4]triazolo[4,3-a]pyrimidin-7(1H)-ones was confirmed by single crystal X-ray crystallography.
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Affiliation(s)
- Awad I Said
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös u. 6 H-6720 Szeged Hungary
- Chemistry Department, Faculty of Science, Assiut University Assiut 71516 Egypt
| | - Márta Palkó
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös u. 6 H-6720 Szeged Hungary
| | - Matti Haukka
- Department of Chemistry, University of Jyväskulä FIN-40014 Jyväskulä Finland
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös u. 6 H-6720 Szeged Hungary
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10
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Norman K, Ciesielski AL, Wagner JR. Identification and associated hazards of clandestine drug laboratories. ACTA ACUST UNITED AC 2020. [DOI: 10.1002/wfs2.1393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Keith Norman
- School of Defence and Security Cranfield University Bedford UK
| | - Austin L. Ciesielski
- School of Forensic Sciences Oklahoma State University Center for Health Sciences Tulsa Oklahoma USA
| | - Jarrad R. Wagner
- School of Forensic Sciences Oklahoma State University Center for Health Sciences Tulsa Oklahoma USA
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11
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Mugnaini C, Sannio F, Brizzi A, Del Prete R, Simone T, Ferraro T, De Luca F, Corelli F, Docquier JD. Screen of Unfocused Libraries Identified Compounds with Direct or Synergistic Antibacterial Activity. ACS Med Chem Lett 2020; 11:899-905. [PMID: 32435403 DOI: 10.1021/acsmedchemlett.9b00674] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/06/2020] [Indexed: 12/17/2022] Open
Abstract
Antibiotic resistance is an increasingly important global public health issue, as major opportunistic pathogens are evolving toward multidrug- and pan-drug resistance phenotypes. New antibiotics are thus needed to maintain our ability to treat bacterial infections. According to the WHO, carbapenem-resistant Acinetobacter, Enterobactericaeae, and Pseudomonas are the most critical targets for the development of new antibacterial drugs. An automated phenotypic screen was implemented to screen 634 synthetic compounds obtained in-house for both their direct-acting and synergistic activity. Fourteen percent and 10% of the compounds showed growth inhibition against tested Gram-positive and Gram-negative bacteria, respectively. The most active direct-acting compounds showed a broad-spectrum antibacterial activity, including on some multidrug-resistant clinical isolates. In addition, 47 compounds were identified for their ability to potentiate the activity of other antibiotics. Compounds of three different scaffolds (2-quinolones, phenols, and pyrazoles) showed a strong potentiation of colistin, some being able to revert colistin resistance in Acinetobacter baumannii.
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Affiliation(s)
- Claudia Mugnaini
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Filomena Sannio
- Dipartimento di Biotecnologie Mediche, Università degli Studi di Siena, Viale Bracci 16, 53100 Siena, Italy
| | - Antonella Brizzi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Rosita Del Prete
- Dipartimento di Biotecnologie Mediche, Università degli Studi di Siena, Viale Bracci 16, 53100 Siena, Italy
| | - Tiziana Simone
- Dipartimento di Biotecnologie Mediche, Università degli Studi di Siena, Viale Bracci 16, 53100 Siena, Italy
| | - Teresa Ferraro
- Lead Discovery Siena S.r.l., Via Vittorio Alfieri, 21, 53019 Castelnuovo Berardenga, Siena, Italy
| | - Filomena De Luca
- Dipartimento di Biotecnologie Mediche, Università degli Studi di Siena, Viale Bracci 16, 53100 Siena, Italy
| | - Federico Corelli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Jean-Denis Docquier
- Dipartimento di Biotecnologie Mediche, Università degli Studi di Siena, Viale Bracci 16, 53100 Siena, Italy
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12
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Sayed AR, Ali SH, Al-Faiyz YS. Recent progress of synthesis of new arylazoazoles based on bis(carbothioamides). SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1661482] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Abdelwahed R. Sayed
- Department of Chemistry, Faculty of Science, King Faisal University, Hofuf, Saudi Arabia
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Sukinah H. Ali
- Department of Chemistry, Faculty of Science, King Faisal University, Hofuf, Saudi Arabia
| | - Yasair S. Al-Faiyz
- Department of Chemistry, Faculty of Science, King Faisal University, Hofuf, Saudi Arabia
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13
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Abu-Zaied MA, Elgemeie GH. Novel synthesis of new pyrazole thioglycosides as pyrazomycin analogues. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 38:374-389. [PMID: 30689496 DOI: 10.1080/15257770.2018.1554220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study reports a novel method for the synthesis of a new class of pyrazole thioglycosides 7a-h as pyrazomycin analogues. These series of compounds were designed through the reaction of sodium 2-cyano-3-oxo-3-(4-substitutedphenylamino)prop-1-ene-1,1-bis(thiolate) salts 2 with phenyl hydrazine in ethanol at room temperature to give the corresponding sodium 5-amino-4-(substitutedphenylcarbamoyl)-1-phenyl-1H-pyrazole-3-thiolates 3a-d. The latter compounds were treated with tetra-acetylated glycosyl bromides 4a,b in DMF at ambient temperature to give the corresponding pyrazole thioglycosides 6a-h. Treatment of pyrazole salts 3a-d with hydrochloric acid at room temperature afforded the corresponding 3-mercaptopyrazole derivatives 5. The latter compounds were treated with tetra-acetylated glycosyl bromides 4 in sodium hydride-DMF to tolerate the S-glycosyl 6a-h compounds. Ammonolysis of the latters afforded the corresponding free thioglycosides 7a-h. The structures of the reaction products were elucidated based on spectral data and elemental analysis.
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Affiliation(s)
| | - Galal H Elgemeie
- b Chemistry Department, Faculty of Science , Helwan University , Helwan , Egypt
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14
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Zhian H, Noroozi Pesyan N, Aalinejad M, Rashidnejad H, Notash B. Unexpected Simple and Catalyst-Free Condensation Reaction of Spiro Dihydrofurans with 2,4-Dinitrophenylhydrazine, Thiosemicarbazide, and Hydroxylamine for the Synthesis of Novel Corresponding 4,4,6′,6′-Tetramethyl-3′-aryl-3′,5′,6′,7′-tetrahydrospiro[cyclo. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hassan Zhian
- Department of Organic Chemistry, Faculty of Chemistry; Urmia University; Urmia 57159 Iran
| | - Nader Noroozi Pesyan
- Department of Organic Chemistry, Faculty of Chemistry; Urmia University; Urmia 57159 Iran
| | - Michael Aalinejad
- Department of Organic Chemistry, Faculty of Chemistry; Urmia University; Urmia 57159 Iran
| | - Hamid Rashidnejad
- Department of Organic Chemistry, Faculty of Chemistry; Urmia University; Urmia 57159 Iran
| | - Behrouz Notash
- Department of Chemistry, Faculty of Science; Shahid Beheshti University; Tehran Iran
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15
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Medicinal chemistry of vicinal diaryl scaffold: A mini review. Eur J Med Chem 2018; 162:1-17. [PMID: 30396033 DOI: 10.1016/j.ejmech.2018.10.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 12/22/2022]
Abstract
The privileged structures have been widely used as a valuable template in new drug discovery. 1,2-Diaryl or vicinal diaryl is a simple scaffold found in many drugs and naturally occurring compounds. From synthetic point of view, the vicinal diaryl derivatives are easily accessible due to their facile and expedient syntheses. These scaffolds have shown numerous interesting pharmacological activities against various diseases with lot of clinical potentials. This review aims to highlight the evidence of vicinal diaryl motif as a privileged scaffold in COX-2 inhibitors and CA-4 analogs.
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16
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Nassar IF, El Farargy AF, Abdelrazek FM. Synthesis and Anticancer Activity of Some New Fused Pyrazoles and Their Glycoside Derivatives. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3208] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ibrahim F. Nassar
- Faculty of Specific Education; Ain Shams University; 365 Ramsis Street, Abassia Cairo Egypt
| | - Ahmed F. El Farargy
- Department of Chemistry, Faculty of Science; Zagazig University; Zagazig Egypt
| | - Fathy M. Abdelrazek
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
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17
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Pelliccia S, Wu YH, Coluccia A, La Regina G, Tseng CK, Famiglini V, Masci D, Hiscott J, Lee JC, Silvestri R. Inhibition of dengue virus replication by novel inhibitors of RNA-dependent RNA polymerase and protease activities. J Enzyme Inhib Med Chem 2017; 32:1091-1101. [PMID: 28776445 PMCID: PMC6010079 DOI: 10.1080/14756366.2017.1355791] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 07/01/2017] [Accepted: 07/12/2017] [Indexed: 11/26/2022] Open
Abstract
Dengue virus (DENV) is the leading mosquito-transmitted viral infection in the world. With more than 390 million new infections annually, and up to 1 million clinical cases with severe disease manifestations, there continues to be a need to develop new antiviral agents against dengue infection. In addition, there is no approved anti-DENV agents for treating DENV-infected patients. In the present study, we identified new compounds with anti-DENV replication activity by targeting viral replication enzymes - NS5, RNA-dependent RNA polymerase (RdRp) and NS3 protease, using cell-based reporter assay. Subsequently, we performed an enzyme-based assay to clarify the action of these compounds against DENV RdRp or NS3 protease activity. Moreover, these compounds exhibited anti-DENV activity in vivo in the ICR-suckling DENV-infected mouse model. Combination drug treatment exhibited a synergistic inhibition of DENV replication. These results describe novel prototypical small anti-DENV molecules for further development through compound modification and provide potential antivirals for treating DENV infection and DENV-related diseases.
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Affiliation(s)
- Sveva Pelliccia
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
| | - Yu-Hsuan Wu
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center of Infectious Disease and Signaling Research, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Antonio Coluccia
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
| | - Giuseppe La Regina
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
| | - Chin-Kai Tseng
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center of Infectious Disease and Signaling Research, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Valeria Famiglini
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
| | - Domiziana Masci
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
| | - John Hiscott
- Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
| | - Jin-Ching Lee
- Department of Biotechnology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
- Research Center for Natural Products and Drug Development, Kaohsiung Medical University, Kaohsiung, Taiwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Romano Silvestri
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Roma, Italy
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18
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Tsai SE, Yen WP, Li YT, Hu YT, Tseng CC, Wong FF. Indium(III) Chloride Promoted One-Pot Multicomponent Synthesis of 1,2,4-Triazole Carrying 1,2,4-Triazin-6-ones from Nitrile Imines and N
,N′
-Bis(trimethylsilyl)carbodiimine. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700271] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shuo-En Tsai
- Ph.D. Program for Biotech Pharmaceutical Industry and School of Pharmacy; China Medical University; No. 91, Hsueh-Shih Rd. Taichung Taiwan 40402 R.O.C
| | - Wan-Ping Yen
- Ph.D. Program for Biotech Pharmaceutical Industry and School of Pharmacy; China Medical University; No. 91, Hsueh-Shih Rd. Taichung Taiwan 40402 R.O.C
| | - Yi-Ting Li
- Master Program for Pharmaceutical Manufacture; China Medical University; No. 91, Hsueh-Shih Rd. Taichung Taiwan 40402 R.O.C
| | - Yu-Tzu Hu
- Master Program for Pharmaceutical Manufacture; China Medical University; No. 91, Hsueh-Shih Rd. Taichung Taiwan 40402 R.O.C
| | - Ching-Chun Tseng
- Master Program for Pharmaceutical Manufacture; China Medical University; No. 91, Hsueh-Shih Rd. Taichung Taiwan 40402 R.O.C
| | - Fung Fuh Wong
- Ph.D. Program for Biotech Pharmaceutical Industry and School of Pharmacy; China Medical University; No. 91, Hsueh-Shih Rd. Taichung Taiwan 40402 R.O.C
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Synthesis and Free Radical Scavenging Activity of New Hydroxybenzylidene Hydrazines. Molecules 2017; 22:molecules22060894. [PMID: 28555047 PMCID: PMC6152720 DOI: 10.3390/molecules22060894] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/25/2017] [Accepted: 05/26/2017] [Indexed: 11/17/2022] Open
Abstract
Hydroxybenzylidene hydrazines exhibit a wide spectrum of biological activities. Here, we report synthesis and free radical scavenging activity of nine new N-(hydroxybenzylidene)-N′-[2,6-dinitro-4-(trifluoromethyl)]phenylhydrazines. The chemical structures of these compounds were confirmed by 1H-NMR, 13C-NMR, 19F-NMR, IR spectroscopy, LC-MS, and elemental analysis. The prepared compounds were tested for their activity to scavenge 2,2-diphenyl-1-picrylhydrazyl (DPPH), galvinoxyl radical (GOR), and 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulphonic acid (ABTS) radicals. The free radical scavenging activity expressed as SC50 values of these compounds varied in a wide range, from a strong to no radical scavenging effect. The most effective radical scavengers were hydroxybenzylidene hydrazines containing three hydroxyl groups in the benzylidene part of their molecules. The prepared compounds were also tested for their activity to inhibit photosynthetic electron transport in spinach chloroplasts. IC50 values of these compounds varied in wide range, from an intermediate to no inhibitory effect.
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20
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Mollica A, Pelliccia S, Famiglini V, Stefanucci A, Macedonio G, Chiavaroli A, Orlando G, Brunetti L, Ferrante C, Pieretti S, Novellino E, Benyhe S, Zador F, Erdei A, Szucs E, Samavati R, Dvrorasko S, Tomboly C, Ragno R, Patsilinakos A, Silvestri R. Exploring the first Rimonabant analog-opioid peptide hybrid compound, as bivalent ligand for CB1 and opioid receptors. J Enzyme Inhib Med Chem 2017; 32:444-451. [PMID: 28097916 PMCID: PMC6009935 DOI: 10.1080/14756366.2016.1260565] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Cannabinoid (CB) and opioid systems are both involved in analgesia, food intake, mood and behavior. Due to the co-localization of µ-opioid (MOR) and CB1 receptors in various regions of the central nervous system (CNS) and their ability to form heterodimers, bivalent ligands targeting to both these systems may be good candidates to investigate the existence of possible cross-talking or synergistic effects, also at sub-effective doses. In this work, we selected from a small series of new Rimonabant analogs one CB1R reverse agonist to be conjugated to the opioid fragment Tyr-D-Ala-Gly-Phe-NH2. The bivalent compound (9) has been used for in vitro binding assays, for in vivo antinociception models and in vitro hypothalamic perfusion test, to evaluate the neurotransmitters release.
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Affiliation(s)
- Adriano Mollica
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Sveva Pelliccia
- b Dipartimento di Chimica e Tecnologie del Farmaco , Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma , Roma , Italy
| | - Valeria Famiglini
- b Dipartimento di Chimica e Tecnologie del Farmaco , Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma , Roma , Italy
| | - Azzurra Stefanucci
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Giorgia Macedonio
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Annalisa Chiavaroli
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Giustino Orlando
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Luigi Brunetti
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Claudio Ferrante
- a Dipartimento di Farmacia , Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Stefano Pieretti
- c Dipartimento del Farmaco , Istituto Superiore di Sanità , Rome , Italy
| | - Ettore Novellino
- d Dipartimento di Farmacia , Università di Napoli "Federico II" , Naples , Italy
| | - Sandor Benyhe
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Ferenc Zador
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Anna Erdei
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Edina Szucs
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Reza Samavati
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Szalbolch Dvrorasko
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Csaba Tomboly
- e Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Szeged , Hungary
| | - Rino Ragno
- f Dipartimento di Chimica e Tecnologie del Farmaco , Rome Center for Molecular Design, Sapienza Università di Roma , Roma , Italy.,g Alchemical Dynamics s.r.l , Roma , Italy
| | - Alexandros Patsilinakos
- f Dipartimento di Chimica e Tecnologie del Farmaco , Rome Center for Molecular Design, Sapienza Università di Roma , Roma , Italy.,g Alchemical Dynamics s.r.l , Roma , Italy
| | - Romano Silvestri
- b Dipartimento di Chimica e Tecnologie del Farmaco , Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma , Roma , Italy
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21
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Multiple biological activities and molecular docking studies of newly synthesized 3-(pyridin-4-yl)-1H-pyrazole-5-carboxamide chalcone hybrids. Bioorg Med Chem Lett 2016; 26:5624-5630. [DOI: 10.1016/j.bmcl.2016.10.075] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 09/17/2016] [Accepted: 10/25/2016] [Indexed: 12/23/2022]
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22
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Scott C, Ahn KH, Graf ST, Goddard WA, Kendall DA, Abrol R. Computational Prediction and Biochemical Analyses of New Inverse Agonists for the CB1 Receptor. J Chem Inf Model 2016; 56:201-12. [PMID: 26633590 PMCID: PMC4863456 DOI: 10.1021/acs.jcim.5b00581] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Indexed: 11/28/2022]
Abstract
Human cannabinoid type 1 (CB1) G-protein coupled receptor is a potential therapeutic target for obesity. The previously predicted and experimentally validated ensemble of ligand-free conformations of CB1 [Scott, C. E. et al. Protein Sci. 2013 , 22 , 101 - 113 ; Ahn, K. H. et al. Proteins 2013 , 81 , 1304 - 1317] are used here to predict the binding sites for known CB1-selective inverse agonists including rimonabant and its seven known derivatives. This binding pocket, which differs significantly from previously published models, is used to identify 16 novel compounds expected to be CB1 inverse agonists by exploiting potential new interactions. We show experimentally that two of these compounds exhibit inverse agonist properties including inhibition of basal and agonist-induced G-protein coupling activity, as well as an enhanced level of CB1 cell surface localization. This demonstrates the utility of using the predicted binding sites for an ensemble of CB1 receptor structures for designing new CB1 inverse agonists.
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Affiliation(s)
- Caitlin
E. Scott
- Materials
and Process Simulation Center, Division of Chemistry and Chemical
Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Kwang H. Ahn
- Department
of Pharmaceutical Sciences, University of
Connecticut, Storrs, Connecticut 06269, United States
| | - Steven T. Graf
- Department
of Pharmaceutical Sciences, University of
Connecticut, Storrs, Connecticut 06269, United States
| | - William A. Goddard
- Materials
and Process Simulation Center, Division of Chemistry and Chemical
Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Debra A. Kendall
- Department
of Pharmaceutical Sciences, University of
Connecticut, Storrs, Connecticut 06269, United States
| | - Ravinder Abrol
- Materials
and Process Simulation Center, Division of Chemistry and Chemical
Engineering, California Institute of Technology, Pasadena, California 91125, United States
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23
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Iyer MR, Cinar R, Liu J, Godlewski G, Szanda G, Puhl H, Ikeda SR, Deschamps J, Lee YS, Steinbach PJ, Kunos G. Structural Basis of Species-Dependent Differential Affinity of 6-Alkoxy-5-Aryl-3-Pyridinecarboxamide Cannabinoid-1 Receptor Antagonists. Mol Pharmacol 2015; 88:238-44. [PMID: 26013543 DOI: 10.1124/mol.115.098541] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 05/26/2015] [Indexed: 12/15/2022] Open
Abstract
6-Alkoxy-5-aryl-3-pyridincarboxamides, including the brain-penetrant compound 14G: [5-(4-chlorophenyl)-6-(cyclopropylmethoxy)-N-[(1R,2R)-2-hydroxy-cyclohexyl]-3-pyridinecarboxamide] and its peripherally restricted analog 14H: [5-(4-chlorophenyl)-N-[(1R,2R)-2-hydroxycyclohexyl]-6-(2-methoxyethoxy)-3-pyridinecarboxamide], have been recently introduced as selective, high-affinity antagonists of the human cannabinoid-1 receptor (hCB1R). Binding analyses revealed two orders of magnitude lower affinity of these compounds for mouse and rat versus human CB1R, whereas the affinity of rimonabant is comparable for all three CB1Rs. Modeling of ligand binding to CB1R and binding assays with native and mutant (Ile105Met) hCB1Rs indicate that the Ile105 to Met mutation in rodent CB1Rs accounts for the species-dependent affinity of 14G: and 14H: . Our work identifies Ile105 as a new pharmacophore component for developing better hCB1R antagonists and invalidates rodent models for assessing the antiobesity efficacy of 14G: and 14H: .
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Affiliation(s)
- Malliga R Iyer
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Resat Cinar
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Jie Liu
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Grzegorz Godlewski
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Gergö Szanda
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Henry Puhl
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Stephen R Ikeda
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Jeffrey Deschamps
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Yong-Sok Lee
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - Peter J Steinbach
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
| | - George Kunos
- Laboratory of Physiologic Studies (M.R.I., R.C., J.L., G.G., G.S., G.K.) and Laboratory of Molecular Physiology (H.P., S.R.I.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland; Naval Research Laboratory, Washington, D.C. (J.D.); and Center for Molecular Modeling, Center for Information Technology, National Institutes of Health, Bethesda, Maryland (Y.-S.L., P.J.S.)
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24
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Keri RS, Chand K, Ramakrishnappa T, Nagaraja BM. Recent progress on pyrazole scaffold-based antimycobacterial agents. Arch Pharm (Weinheim) 2015; 348:299-314. [PMID: 25820461 DOI: 10.1002/ardp.201400452] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 02/14/2015] [Accepted: 02/17/2015] [Indexed: 11/05/2022]
Abstract
New and reemerging infectious diseases will continue to pose serious global health threats well into the 21st century and according to the World Health Organization report, these are still the leading cause of death among humans worldwide. Among infectious diseases, tuberculosis claims approximately 2 million deaths per year worldwide. Also, agents that reduce the duration and complexity of the current therapy would have a major impact on the overall cure rate. Due to the development of resistance to conventional antibiotics there is a need for new therapeutic strategies to combat Mycobacterium tuberculosis. Subsequently, there is an urgent need for the development of new drug candidates with newer targets and alternative mechanism of action. In this perspective, pyrazole, one of the most important classes of heterocycles, has been the topic of research for thousands of researchers all over the world because of its wide spectrum of biological activities. To pave the way for future research, there is a need to collect the latest information in this promising area. In the present review, we have collated published reports on the pyrazole core to provide an insight so that its full therapeutic potential can be utilized for the treatment of tuberculosis. In this article, the possible structure-activity relationship of pyrazole analogs for designing better antituberculosis (anti-TB) agents has been discussed and is also helpful for new thoughts in the quest for rational designs of more active and less toxic pyrazole-based anti-TB drugs.
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Affiliation(s)
- Rangappa S Keri
- Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Bangalore, Karnataka, India; Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
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25
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Khidre RE, Abdel-Wahab BF, Farahat AA, Mohamed HA. Synthetic Routes to Pyrazole-3(5)-carboxylates. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.1504] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rizk E. Khidre
- Chemical Industries Division; National Research Centre; Dokki 12622 Giza Egypt
- Chemistry Department, Faculty of Science; Jazan University; Jazan Saudi Arabia
| | - Bakr F. Abdel-Wahab
- Applied Organic Chemistry Department; National Research Centre; Dokki 12622 Giza Egypt
| | - Abdelbasset A. Farahat
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy; Mansoura University; Mansoura 35516 Egypt
| | - Hanan A. Mohamed
- Applied Organic Chemistry Department; National Research Centre; Dokki 12622 Giza Egypt
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26
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Manvar D, Pelliccia S, La Regina G, Famiglini V, Coluccia A, Ruggieri A, Anticoli S, Lee JC, Basu A, Cevik O, Nencioni L, Palamara AT, Zamperini C, Botta M, Neyts J, Leyssen P, Kaushik-Basu N, Silvestri R. New 1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides inhibit hepatitis C virus replication via suppression of cyclooxygenase-2. Eur J Med Chem 2014; 90:497-506. [PMID: 25483263 DOI: 10.1016/j.ejmech.2014.11.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 11/15/2014] [Accepted: 11/21/2014] [Indexed: 12/18/2022]
Abstract
We report here the synthesis and mechanism of inhibition of pyrazolecarboxamide derivatives as a new class of HCV inhibitors. Compounds 6, 7, 8 and 16 inhibited the subgenomic HCV replicon 1b genotype at EC50 values between 5 and 8 μM and displayed an even higher potency against the infectious Jc1 HCV 2a genotype. Compound 6 exhibited an EC50 of 6.7 μM and selectivity index of 23 against HCV 1b, and reduced the RNA copies of the infectious Jc1 chimeric 2a clone by 82% at 7 μM. Evaluation of the mode of anti-HCV activity of 6 revealed that it suppressed HCV-induced COX-2 mRNA and protein expression, displaying an IC50 of 3.2 μM in COX-2 promoter-linked luciferase reporter assay. Conversely, the anti-HCV activity of 6 was abrogated upon over-expression of COX-2. These findings suggest that 6 as a representative of these pyrazolecarboxamides function as anti-HCV agents via targeting COX-2 at both the transcription and translation levels.
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Affiliation(s)
- Dinesh Manvar
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey, New Jersey Medical School, 185 South Orange Avenue, New Jersey 07103, United States
| | - Sveva Pelliccia
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Giuseppe La Regina
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Valeria Famiglini
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Antonio Coluccia
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Anna Ruggieri
- Istituto Superiore di Sanità, Department of Infectious Parasitic and Immune Mediated Diseases, Viale Regina Elena 299, I-00161 Roma, Italy
| | - Simona Anticoli
- Department of Public Health and Infectious Diseases, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Jin-Ching Lee
- Department of Biotechnology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan, Republic of China
| | - Amartya Basu
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey, New Jersey Medical School, 185 South Orange Avenue, New Jersey 07103, United States
| | - Ozge Cevik
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey, New Jersey Medical School, 185 South Orange Avenue, New Jersey 07103, United States
| | - Lucia Nencioni
- Department of Public Health and Infectious Diseases, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Anna Teresa Palamara
- Department of Public Health and Infectious Diseases, Istituto Pasteur - Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy; San Raffaele Pisana Scientific Institute for Research, Hospitalization and Health Care, 00166 Rome, Italy
| | - Claudio Zamperini
- Dipartimento di Biotecnologia Chimica e Farmacia, Università di Siena, Via Aldo Moro 2, I-53100 Siena, Italy
| | - Maurizio Botta
- Dipartimento di Biotecnologia Chimica e Farmacia, Università di Siena, Via Aldo Moro 2, I-53100 Siena, Italy
| | - Johan Neyts
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - Pieter Leyssen
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - Neerja Kaushik-Basu
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey, New Jersey Medical School, 185 South Orange Avenue, New Jersey 07103, United States
| | - Romano Silvestri
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy.
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27
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Prospective therapeutic agents for obesity: Molecular modification approaches of centrally and peripherally acting selective cannabinoid 1 receptor antagonists. Eur J Med Chem 2014; 79:298-339. [DOI: 10.1016/j.ejmech.2014.04.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 01/29/2023]
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28
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Wang LY, Tsai HJ, Lin HY, Kaneko K, Cheng FY, Shih HS, Wong FF, Huang JJ. One-flask synthesis of 1,3,5-trisubstituted 1,2,4-triazoles from nitriles and hydrazonoyl chlorides via 1,3-dipolar cycloaddition. RSC Adv 2014. [DOI: 10.1039/c4ra00113c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One-flask synthesis of 1,3,5-trisubstituted 1,2,4-triazoles from nitriles and hydrazonoyl chlorides via 1,3-dipolar cycloaddition.
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Affiliation(s)
- Li-Ya Wang
- Graduate Institute of Pharmaceutical Chemistry
- China Medical University
- Taichung 40402, Taiwan
- The Ph.D. Program for Cancer Biology and Drug Discovery
- China Medical University
| | - Henry J. Tsai
- Department of Health and Nutrition Biotechnology
- Asia University
- Taichung 41354, Taiwan
| | - Hui-Yi Lin
- School of Pharmacy
- China Medical University
- Taichung 40402, Taiwan
| | - Kimiyoshi Kaneko
- Department of Medico Pharmaceutical Science
- Nihon Pharmaceutical University
- Saitama, Japan
| | - Fen-Ying Cheng
- Department of Applied Chemistry
- National Chiayi University
- Chiayi City 60004, Taiwan
| | - Hsin-Siao Shih
- Department of Applied Chemistry
- National Chiayi University
- Chiayi City 60004, Taiwan
| | - Fung Fuh Wong
- Graduate Institute of Pharmaceutical Chemistry
- China Medical University
- Taichung 40402, Taiwan
| | - Jiann-Jyh Huang
- Department of Applied Chemistry
- National Chiayi University
- Chiayi City 60004, Taiwan
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29
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Osman NA, Mahmoud AH, Klein CD, Allarà M, Di Marzo V, Abouzid KM, Abadi AH. Naphthalene and 2,3-dihydrobenzo[b][1,4]dioxine derivatives with extended side chains as new scaffolds of CB2-selective ligands. MEDCHEMCOMM 2014. [DOI: 10.1039/c4md00232f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the synthesis of naphthalene, dihydrobenzodioxine and fluorene derivatives with extended side chains and their biological evaluation as ligands of CB1 and CB2 receptors.
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Affiliation(s)
- Noha A. Osman
- Department of Pharmaceutical Chemistry
- Faculty of Pharmacy and Biotechnology
- German University in Cairo
- Cairo 11835, Egypt
| | - Amr H. Mahmoud
- Pharmaceutical Chemistry Department
- Faculty of Pharmacy
- Ain Shams University
- Cairo 11566, Egypt
| | - Christian D. Klein
- Medicinal Chemistry
- Institute of Pharmacy and Molecular Biotechnology IPMB
- Heidelberg University
- 69120 Heidelberg, Germany
| | - Marco Allarà
- Endocannabinoid Research Group
- Institute of Biomolecular Chemistry
- Consiglio Nazionale delle Ricerche
- Pozzuoli, Italy
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group
- Institute of Biomolecular Chemistry
- Consiglio Nazionale delle Ricerche
- Pozzuoli, Italy
| | - Khaled M. Abouzid
- Pharmaceutical Chemistry Department
- Faculty of Pharmacy
- Ain Shams University
- Cairo 11566, Egypt
| | - Ashraf H. Abadi
- Department of Pharmaceutical Chemistry
- Faculty of Pharmacy and Biotechnology
- German University in Cairo
- Cairo 11835, Egypt
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30
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Gangurde SA, Kanawade SB, Nikam PS, Bhavsar DC, Toche RB. New Synthesis and Reactions of Ethyl 5-amino-4-cyano-1-phenyl-1H-pyrazole-3-carboxylate. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sachin A. Gangurde
- Organic Chemistry Research Center, Department of Chemistry, K.R.T. Arts, B.H. Commerce and A. M. Science College; University of Pune; Gangapur Road Nashik 422002 Maharashtra India
| | - Shrikant B. Kanawade
- Organic Chemistry Research Center, Department of Chemistry, K.R.T. Arts, B.H. Commerce and A. M. Science College; University of Pune; Gangapur Road Nashik 422002 Maharashtra India
| | - Prashant S. Nikam
- Organic Chemistry Research Center, Department of Chemistry, K.R.T. Arts, B.H. Commerce and A. M. Science College; University of Pune; Gangapur Road Nashik 422002 Maharashtra India
| | - Dinesh C. Bhavsar
- Organic Chemistry Research Center, Department of Chemistry, K.R.T. Arts, B.H. Commerce and A. M. Science College; University of Pune; Gangapur Road Nashik 422002 Maharashtra India
| | - Raghunath B. Toche
- Organic Chemistry Research Center, Department of Chemistry, K.R.T. Arts, B.H. Commerce and A. M. Science College; University of Pune; Gangapur Road Nashik 422002 Maharashtra India
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31
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Tridentate bipyrazole compounds with a side-arm as a new class of antitumor agents. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-012-0993-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Palanisamy P, Kumaresan S. Analogues of N,1-diphenyl-4,5-dihydro-1H-[1]benzothiepino[5,4-c]pyrazole-3-carboxamide and N,1-diphenyl-4,5-dihydro-1H-[1]benzothiepino[5,4-c]pyrazole-3-carboxamide-6,6-dioxide: syntheses, characterization, antimicrobial, antituberculosis, and antitumor activity. RSC Adv 2013. [DOI: 10.1039/c3ra23124k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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33
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Shim JY, Bertalovitz AC, Kendall DA. Probing the interaction of SR141716A with the CB1 receptor. J Biol Chem 2012; 287:38741-54. [PMID: 22995906 DOI: 10.1074/jbc.m112.390955] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
SR141716A binds selectively to the brain cannabinoid (CB1) receptor and exhibits a potent inverse agonist/antagonist activity. Although SR141716A, also known as rimonabant, has been withdrawn from the market due to severe side effects, there remains interest in some of its many potential medical applications. Consequently, it is imperative to understand the mechanism by which SR141716A exerts its inverse agonist activity. As a result of using an approach combining mutagenesis and molecular dynamics simulations, we determined the binding mode of SR141716A. We found from the simulation of the CB1-SR141716A complex that SR141716A projects toward TM5 to interact tightly with the major binding pocket, replacing the coordinated water molecules, and secures the Trp-356(6.48) rotameric switch in the inactive state to promote the formation of an extensive water-mediated H-bonding network to the highly conserved SLAXAD and NPXXY motifs in TM2/TM7. We identify for the first time the involvement of the minor binding pocket formed by TM2/TM3/TM7 for SR141716A binding, which complements the major binding pocket formed by TM3/TM5/TM6. Simulation of the F174(2.61)A mutant CB1-SR141716A complex demonstrates the perturbation of TM2 that attenuates SR141716A binding indirectly. These results suggest SR141716A exerts inverse agonist activity through the stabilization of both TM2 and TM5, securing the Trp-356(6.48) rotameric switch and restraining it from activation.
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Affiliation(s)
- Joong-Youn Shim
- J. L. Chambers Biomedical/Biotechnology Research Institute, North Carolina Central University, Durham, North Carolina 27707, USA.
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34
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Kandeel MM, Mohamed LW, Abd El Hamid MK, Negmeldin AT. Design, Synthesis, and Antitumor Evaluation of Novel Pyrazolo[3,4-d]pyrimidine Derivatives. Sci Pharm 2012; 80:531-45. [PMID: 23008804 PMCID: PMC3447607 DOI: 10.3797/scipharm.1204-23] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 06/25/2012] [Indexed: 11/22/2022] Open
Abstract
A new series of pyrazolo[3,4-d]pyrimidines has been synthesized. The new compounds were tested for their antitumor activity on 60 different cell lines, and some of the compounds were found to have potent antitumor activity. In particular, 2-hydroxybenzaldehyde [1-(4-chlorophenyl)-3-methyl-1H-pyrazolo-[3,4-d]pyrimidin-4-yl]hydrazone (VIIa) was found to be the most effective among the other derivatives, showing IC50 values of 0.326 to 4.31 μM on 57 different cell lines.
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Affiliation(s)
- Manal M Kandeel
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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35
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Pasquini S, Mugnaini C, Ligresti A, Tafi A, Brogi S, Falciani C, Pedani V, Pesco N, Guida F, Luongo L, Varani K, Borea PA, Maione S, Di Marzo V, Corelli F. Design, synthesis, and pharmacological characterization of indol-3-ylacetamides, indol-3-yloxoacetamides, and indol-3-ylcarboxamides: potent and selective CB2 cannabinoid receptor inverse agonists. J Med Chem 2012; 55:5391-402. [PMID: 22548457 DOI: 10.1021/jm3003334] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In our search for new cannabinoid receptor modulators, we describe herein the design and synthesis of three sets of indole-based ligands characterized by an acetamide, oxalylamide, or carboxamide chain, respectively. Most of the compounds showed affinity for CB2 receptors in the nanomolar range, with K(i) values spanning 3 orders of magnitude (377-0.37 nM), and moderate to good selectivity over CB1 receptors. Their in vitro functional activity as inverse agonists was confirmed in vivo in the formalin test of acute peripheral and inflammatory pain in mice, in which compounds 10a and 11e proved to be able to reverse the effect of the CB2 selective agonist COR167.
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Affiliation(s)
- Serena Pasquini
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
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36
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Abstract
Synaptic activity in magnocellular neurosecretory neurones is influenced by the retrograde (i.e. somatodendritic) release of vasopressin, oxytocin and cannabinoids (CBs). For oxytocin neurones, oxytocin exerts constitutive effects on pre-synaptic activity through its ability to release CBs post-synaptically. In the present study, we examined evoked inhibitory post-synaptic currents (eIPSCs) and spontaneous inhibitory post-synaptic currents (sIPSCs) in identified vasopressin (VP) neurones in coronal slices from virgin rats to determine: (i) the extent to which CBs may also tonically modulate VP synaptic activity; and (ii) to determine whether depolarisation-induced suppression of inhibition was present in VP neurones, and if so, whether it was mediated by VP or CBs. The CB1 antagonists AM251 (1 μm) and SR14171 (1 μm) consistently increased the frequency of sIPSCs in VP neurones without affecting their amplitude, suggesting a tonic CB presence. This effect on frequency was independent of action potential activity, and blocked by chelating intracellular calcium with 10 mm ethylene glycol tetraacetic acid (EGTA). AM251 also increased the amplitude of eIPSCs and decreased the paired-pulse ratio (PPR) in VP neurones-effects that were completely blocked with even low (1 mm EGTA) internal calcium chelation. Bouts of evoked firing of VP neurones consistently suppressed sIPSCs but had no effect on eIPSCs or the PPR. This depolarisation-induced suppression of IPSCs was reduced by AM251, and was totally blocked by 10 μm of the mixed vasopressin/oxytocin antagonist, Manning compound. We then tested the effect of vasopressin on IPSCs at the same time as blocking CB1 receptors. Vasopressin (10-100 nm) inhibited sIPSC frequency but had no effect on sIPSC or eIPSC amplitudes, or on the PPR, in the presence of AM251. Taken together, these results suggest a tonic, pre-synaptic inhibitory modulation of IPSCs in VP neurones by CBs that is largely dependent on post-synaptic calcium, and an inhibitory effect of VP on IPSCs that is independent of CB release.
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Affiliation(s)
- L Wang
- Department of Anatomy and Neurobiology and Neuroscience Institute, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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37
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Abu Thaher B, Arnsmann M, Totzke F, Ehlert JE, Kubbutat MHG, Schächtele C, Zimmermann MO, Koch P, Boeckler FM, Laufer SA. Tri- and tetrasubstituted pyrazole derivates: regioisomerism switches activity from p38MAP kinase to important cancer kinases. J Med Chem 2012; 55:961-5. [PMID: 22185282 DOI: 10.1021/jm201391u] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the course of searching for new p38α MAP kinase inhibitors, we found that the regioisomeric switch from 3-(4-fluorophenyl)-4-(pyridin-4-yl)-1-(aryl)-1H-pyrazol-5-amine to 4-(4-fluorophenyl)-3-(pyridin-4-yl)-1-(aryl)-1H-pyrazol-5-amine led to an almost complete loss of p38α inhibition, but they showed activity against important cancer kinases. Among the tested derivatives, 4-(4-fluorophenyl)-3-(pyridin-4-yl)-1-(2,4,6-trichlorophenyl)-1H-pyrazol-5-amine (6a) exhibited the best activity, with IC(50) in the nanomolar range against Src, B-Raf wt, B-Raf V600E, EGFRs, and VEGFR-2, making it a good lead for novel anticancer programs.
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Affiliation(s)
- Bassam Abu Thaher
- Faculty of Science, Chemistry Department, Islamic University of Gaza, Gaza Strip, Palestine
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38
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39
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1-Aryl-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamide: An effective scaffold for the design of either CB1 or CB2 receptor ligands. Eur J Med Chem 2011; 46:5641-53. [DOI: 10.1016/j.ejmech.2011.09.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 09/05/2011] [Accepted: 09/21/2011] [Indexed: 11/19/2022]
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40
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Wang LY, Tseng WC, Wu TS, Kaneko K, Takayama H, Kimura M, Yang WC, Wu JB, Juang SH, Wong FF. Synthesis and antiproliferative evaluation of 3,5-disubstituted 1,2,4-triazoles containing flurophenyl and trifluoromethanephenyl moieties. Bioorg Med Chem Lett 2011; 21:5358-62. [DOI: 10.1016/j.bmcl.2011.07.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 07/04/2011] [Accepted: 07/06/2011] [Indexed: 10/18/2022]
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41
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Tseng WC, Wang LY, Wu TS, Wong FF. ‘One-flask’ synthesis to 3,5-disubstituted 1,2,4-triazoles from aldehydes with hydrazonoyl hydrochlorides via 1,3-dipolar cycloaddition. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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42
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Lian S, Liu JT, Zheng LW, Liu WY, Zhao BX. Synthesis, Structure Characterization, and X-ray Crystallography of Novel 1-Benzyl-3-phenyl-1H-pyrazole-5-carboxylate Derivatives with a Carbohydrate Moiety. J Carbohydr Chem 2011. [DOI: 10.1080/07328303.2011.583371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Song Lian
- a Institute of Organic Chemistry, School of Chemistry and Chemical Engineering , Shandong University , Jinan, 250100, P.R. China
| | - Jin-Ting Liu
- a Institute of Organic Chemistry, School of Chemistry and Chemical Engineering , Shandong University , Jinan, 250100, P.R. China
| | - Liang-Wen Zheng
- a Institute of Organic Chemistry, School of Chemistry and Chemical Engineering , Shandong University , Jinan, 250100, P.R. China
| | - Wei-Yong Liu
- a Institute of Organic Chemistry, School of Chemistry and Chemical Engineering , Shandong University , Jinan, 250100, P.R. China
| | - Bao-Xiang Zhao
- a Institute of Organic Chemistry, School of Chemistry and Chemical Engineering , Shandong University , Jinan, 250100, P.R. China
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43
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Moaddel R, Rosenberg A, Spelman K, Frazier J, Frazier C, Nocerino S, Brizzi A, Mugnaini C, Wainer IW. Development and characterization of immobilized cannabinoid receptor (CB1/CB2) open tubular column for on-line screening. Anal Biochem 2011; 412:85-91. [PMID: 21215722 PMCID: PMC3053438 DOI: 10.1016/j.ab.2010.12.034] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 12/20/2010] [Accepted: 12/28/2010] [Indexed: 01/23/2023]
Abstract
Cannabinoid receptors, CB1 and CB2, are therapeutic targets in the treatment of anxiety, obesity, movement disorders, glaucoma, and pain. We have developed an on-line screening method for CB1 and CB2 ligands, where cellular membrane fragments of a chronic myelogenous leukemia cell line, KU-812, were immobilized onto the surface of an open tubular (OT) capillary to create a CB1/CB2-OT column. The binding activities of the immobilized CB1/CB2 receptors were established using frontal affinity chromatographic techniques. This is the first report that confirms the presence of functional CB1 and CB2 receptors on KU-812 cells. The data from this study confirm that the CB1/CB2-OT column can be used to determine the binding affinities (K(i) values) for a single compound and to screen individual compounds or a mixture of multiple compounds. The CB1/CB2-OT column was also used to screen a botanical matrix, Zanthoxylum clava-herculis, where preliminary results suggest the presence of a high-affinity phytocannabinoid.
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MESH Headings
- Cannabinoids/chemistry
- Cell Line, Tumor
- Chromatography, Affinity/methods
- Humans
- Immobilized Proteins/chemistry
- Plant Roots/chemistry
- Protein Binding
- Receptor, Cannabinoid, CB1/agonists
- Receptor, Cannabinoid, CB1/chemistry
- Receptor, Cannabinoid, CB2/agonists
- Receptor, Cannabinoid, CB2/chemistry
- Zanthoxylum/chemistry
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Affiliation(s)
- R Moaddel
- Gerontology Research Center, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA.
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44
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La Regina G, Gatti V, Piscitelli F, Silvestri R. Open vessel and cooling while heating microwave-assisted synthesis of pyridinyl N-aryl hydrazones. ACS COMBINATORIAL SCIENCE 2011; 13:2-6. [PMID: 21247117 DOI: 10.1021/co100015b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We reported the first example of open vessel and cooling while heating microwave-assisted synthesis of pyridinyl N-aryl hydrazones. Compounds were prepared in excellent isolated yields (88-98%) in only 5 min, by reacting 4- and 2,4-(di)substituted phenylhydrazines, bearing both electron-donating (4-CH₃, 4-OCH₃) and -withdrawing (4-Cl, 4-Br, 4-CF₃, 4-NO₂, 2,4-Cl₂) groups with 2-, 3-, and 4-acetylpyridine. The method was successfully extended to other carbonyl compounds.
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Affiliation(s)
- Giuseppe La Regina
- Istituto Pasteur, Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185, Rome, Italy
| | - Valerio Gatti
- Istituto Pasteur, Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185, Rome, Italy
| | - Francesco Piscitelli
- Istituto Pasteur, Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185, Rome, Italy
| | - Romano Silvestri
- Istituto Pasteur, Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185, Rome, Italy
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Silvestri R, Ligresti A, La Regina G, Piscitelli F, Gatti V, Lavecchia A, Brizzi A, Pasquini S, Allarà M, Fantini N, Carai MAM, Bigogno C, Rozio MG, Sinisi R, Novellino E, Colombo G, Di Marzo V, Dondio G, Corelli F. Synthesis and biological evaluation of new N-alkyl 1-aryl-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides as cannabinoid receptor ligands. Eur J Med Chem 2010; 45:5878-86. [DOI: 10.1016/j.ejmech.2010.09.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 09/20/2010] [Accepted: 09/21/2010] [Indexed: 11/28/2022]
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Brogi S, Corelli F, Di Marzo V, Ligresti A, Mugnaini C, Pasquini S, Tafi A. Three-dimensional quantitative structure-selectivity relationships analysis guided rational design of a highly selective ligand for the cannabinoid receptor 2. Eur J Med Chem 2010; 46:547-55. [PMID: 21183257 DOI: 10.1016/j.ejmech.2010.11.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 10/22/2010] [Accepted: 11/19/2010] [Indexed: 10/18/2022]
Abstract
This paper describes a three-dimensional quantitative structure-selectivity relationships (3D-QSSR) study for selectivity of a series of ligands for cannabinoid CB1 and CB2 receptors. 3D-QSSR exploration was expected to provide design information for drugs with high selectivity toward the CB2 receptor. The proposed 3D computational model was performed by Phase and generated taking into account a number of structurally diverse compounds characterized by a wide range of selectivity index values. The model proved to be predictive, with r2 of 0.95 and Q2 of 0.63. In order to get prospective experimental validation, the selectivity of an external data set of 39 compounds reported in the literature was predicted. The correlation coefficient (r2=0.56) obtained on this unrelated test set provided evidence that the correlation shown by the model was not a chance result. Subsequently, we essayed the ability of our approach to help the design of new CB2-selective ligands. Accordingly, based on our interest in studying the cannabinergic properties of quinolones, the N-(adamantan-1-yl)-4-oxo-8-methyl-1-pentyl-1,4-dihydroquinoline-3-carboxamide (65) was considered as a potential synthetic target. The log(SI) value predicted by using our model was indicative of high CB2 selectivity for such a compound, thus spurring us to synthesize it and to evaluate its CB1 and CB2 receptor affinity. Compound 65 was found to be an extremely selective CB2 ligand as it displayed high CB2 affinity (Ki=4.9 nM), while being devoid of CB1 affinity (Ki>10,000 nM). The identification of a new selective CB2 receptor ligand lends support for the practicability of quantitative ligand-based selectivity models for cannabinoid receptors. These drug discovery tools might represent a valuable complementary approach to docking studies performed on homology models of the receptors.
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Affiliation(s)
- Simone Brogi
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via Alcide de Gasperi 2, 53100 Siena, Italy
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Pasquini S, Ligresti A, Mugnaini C, Semeraro T, Cicione L, De Rosa M, Guida F, Luongo L, De Chiaro M, Cascio MG, Bolognini D, Marini P, Pertwee R, Maione S, Marzo VD, Corelli F. Investigations on the 4-Quinolone-3-carboxylic Acid Motif. 3. Synthesis, Structure−Affinity Relationships, and Pharmacological Characterization of 6-Substituted 4-Quinolone-3-carboxamides as Highly Selective Cannabinoid-2 Receptor Ligands. J Med Chem 2010; 53:5915-28. [DOI: 10.1021/jm100123x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Serena Pasquini
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
| | - Alessia Ligresti
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Via dei Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy
| | - Claudia Mugnaini
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
| | - Teresa Semeraro
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
| | - Lavinia Cicione
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
| | - Maria De Rosa
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
| | - Francesca Guida
- Department of Experimental Medicine—Section of Pharmacology “L. Donatelli”, Second University of Naples, Via S. Maria di Costantinopoli 16, 80138 Naples, Italy
| | - Livio Luongo
- Department of Experimental Medicine—Section of Pharmacology “L. Donatelli”, Second University of Naples, Via S. Maria di Costantinopoli 16, 80138 Naples, Italy
| | - Maria De Chiaro
- Department of Experimental Medicine—Section of Pharmacology “L. Donatelli”, Second University of Naples, Via S. Maria di Costantinopoli 16, 80138 Naples, Italy
| | - Maria Grazia Cascio
- Institute of Medical Sciences University of Aberdeen, Aberdeen AB25 2ZD, Scotland, U.K
| | - Daniele Bolognini
- DBSF, Pharmacology Section and Neuroscience Centre, University of Insubria, Busto Arsizio (Va), Italy
- Institute of Medical Sciences University of Aberdeen, Aberdeen AB25 2ZD, Scotland, U.K
| | - Pietro Marini
- Institute of Medical Sciences University of Aberdeen, Aberdeen AB25 2ZD, Scotland, U.K
| | - Roger Pertwee
- Institute of Medical Sciences University of Aberdeen, Aberdeen AB25 2ZD, Scotland, U.K
| | - Sabatino Maione
- Department of Experimental Medicine—Section of Pharmacology “L. Donatelli”, Second University of Naples, Via S. Maria di Costantinopoli 16, 80138 Naples, Italy
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Via dei Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy
| | - Federico Corelli
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via A. Moro, 53100 Siena, Italy
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Geiger S, Nickl K, Schneider EH, Seifert R, Heilmann J. Establishment of recombinant cannabinoid receptor assays and characterization of several natural and synthetic ligands. Naunyn Schmiedebergs Arch Pharmacol 2010; 382:177-91. [PMID: 20617431 DOI: 10.1007/s00210-010-0534-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Accepted: 06/21/2010] [Indexed: 11/24/2022]
Abstract
Cannabinoid receptors (CBR) are important drug targets for the treatment of various inflammatory, metabolic and neurological diseases. Therefore, sensitive test systems for the assessment of ligands are needed. In this study, a steady-state GTPase assay for human CBR subtypes 1 and 2 was developed to characterize the pharmacological property of ligands at a very proximal point of the signal transduction cascade. Establishing these in vitro test sytems, we studied cell or tissue membranes heterogenously or endogenously expressing CBR, such as CBR-infected Human Embryonic Kidney (HEK) 293 cells, rat cerebellum and spleen cells. The lack of effects in the GTPase assay and in [(35)S]GTPgammaS binding experiments in these expression system, directed us to use Spodoptera frugiperda (Sf9) cells. Co-expressing CBR, different Galpha-subunits, Gbetagamma heterodimer, and RGS (Regulator of G-protein signaling)-proteins in Sf9 cell membranes greatly improved the sensitivity of the assay, with highest GTPase activation in the CBR + Galpha(i2) + Gbeta(1)gamma(2) + RGS4 system. We examined exogenous and endogenous standard ligands as well as secondary metabolites as Delta(9)-tetrahydrocannabinol (Delta(9)-THC), dodeca-2E,4E-dienoic acid isobutylamide, an alkylamide from Echinacea purpurea, and an E. purpurea hexane extract according their agonistic and antagonistic properties. The suitability of the assay for screening procedures was also proven by detecting the activity of Delta(9)-THC in a matrix of other less active compounds (Delta(9)-THC-free Cannabis sativa extract). In conclusion, we have developed highly sensitive test systems for the analysis of CBR ligands.
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Affiliation(s)
- Sarah Geiger
- Department of Pharmaceutical Biology, Institute of Pharmacy, University of Regensburg, 93053, Regensburg, Germany
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Velcicky J, Feifel R, Hawtin S, Heng R, Huppertz C, Koch G, Kroemer M, Moebitz H, Revesz L, Scheufler C, Schlapbach A. Novel 3-aminopyrazole inhibitors of MK-2 discovered by scaffold hopping strategy. Bioorg Med Chem Lett 2009; 20:1293-7. [PMID: 20060294 DOI: 10.1016/j.bmcl.2009.10.138] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 10/29/2009] [Accepted: 10/30/2009] [Indexed: 11/19/2022]
Abstract
New, selective 3-aminopyrazole based MK2-inhibitors were discovered by scaffold hopping strategy. The new derivatives proved to inhibit intracellular phosphorylation of hsp27 as well as LPS-induced TNFalpha release in cells. In addition, selected derivative 14e also inhibited LPS-induced TNFalpha release in vivo.
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Affiliation(s)
- Juraj Velcicky
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland.
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50
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Synthesis of novel pyrazole carboxamide derivatives and discovery of modulators for apoptosis or autophagy in A549 lung cancer cells. Bioorg Med Chem Lett 2009; 19:5325-8. [DOI: 10.1016/j.bmcl.2009.07.131] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/25/2009] [Accepted: 07/29/2009] [Indexed: 01/07/2023]
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