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Liu L, Wu H, Long Y, Yang X, Du C, Xu Y, Ji Q. Novel spiro[pyrrolidine-2,3'-quinoline]-2'-one derivatives containing piperazine fragment as potential chitin synthase inhibitors and antifungal agents: Design, synthesis and biological evaluation. Eur J Med Chem 2023; 260:115777. [PMID: 37660485 DOI: 10.1016/j.ejmech.2023.115777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/02/2023] [Accepted: 08/29/2023] [Indexed: 09/05/2023]
Abstract
A series of spiro[pyrrolidine-2,3'-quinoline]-2'-one derivatives were designed and synthesized for the discovery of novel antifungal drugs. The bioactivities of all derivatives were screened by evaluating their inhibitory effects against chitin synthase (CHS) and antimicrobial activities in vitro. Enzyme inhibition experiments showed that all the synthesized compounds inhibited the chitin synthase. Compounds 4d, 4k, 4n and 4o showed inhibitory effects against CHS with IC50 values which were close to that of the control drug (polyoxin B). The results of enzyme kinetics experiment showed that these compounds were non-competitive inhibitors of chitin synthase (Ki of compound 4o is 0.14 mM). Antimicrobial experiments showed that these compounds exhibited moderate to excellent antifungal activity against pathogenic fungal strains while the compounds showed little potency against bacteria. Among them, compounds 4d, 4f, 4k and 4n showed stronger antifungal activities against C. albicans than those of fluconazole and polyoxin B. Compounds 4f, 4n and 4o showed better antifungal activities against A. flavus than those of fluconazole and polyoxin B. Compound 4d showed similar activity to that of fluconazole and stronger activity than those of polyoxin B against C. neoformans and A. fumigatus. It is also showed that these compounds have the potency against drug-resistant fungal variants. The results of sorbitol protection assay and evaluation of antifungal activity against micafungin-resistant strains experiment further illustrated that these compounds inhibited the synthesis of chitin of fungal cell wall. Drug combination experiments showed that these compounds had synergistic or additive effects when combined with fluconazole or polyoxin B. The synergistic effects with polyoxin B further confirmed the compounds were non-competitive inhibitors of chitin synthase. Additionally, docking studies showed that these compounds had strong affinity with chitin synthase from C. albicans (CaChs2). These results indicate that the target of these synthesized compounds is chitin synthase, and these compounds had excellent antifungal activity while possessed the potency against drug-resistant fungal variants.
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Affiliation(s)
- Lige Liu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Hu Wu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Yan Long
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Xinlong Yang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Chuanbiao Du
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Yajie Xu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Qinggang Ji
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China.
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2
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Zhou H, Yang N, Li W, Peng X, Dong J, Jiang Y, Yan L, Zhang D, Jin Y. Exploration of Baicalein-Core Derivatives as Potent Antifungal Agents: SAR and Mechanism Insights. Molecules 2023; 28:6340. [PMID: 37687172 PMCID: PMC10489750 DOI: 10.3390/molecules28176340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/23/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023] Open
Abstract
Baicalein (BE), the major component of Scutellaria Baicalensis, exhibited potently antifungal activity against drug-resistant Candida albicans, and strong inhibition on biofilm formation. Therefore, a series of baicalein-core derivatives were designed and synthesized to find more potent compounds and investigate structure-activity relationship (SAR) and mode of action (MoA). Results demonstrate that A4 and B5 exert a more potent antifungal effect (MIC80 = 0.125 μg/mL) than BE (MIC80 = 4 μg/mL) when used in combination with fluconazole (FLC), while the MIC80 of FLC dropped from 128 μg/mL to 1 μg/mL. SAR analysis indicates that the presence of 5-OH is crucial for synergistic antifungal activities, while o-dihydroxyls and vic-trihydroxyls are an essential pharmacophore, whether they are located on the A ring or the B ring of flavonoids. The MoA demonstrated that these compounds exhibited potent antifungal effects by inhibiting hypha formation of C. albicans. However, sterol composition assay and enzymatic assay conducted in vitro indicated minimal impact of these compounds on sterol biosynthesis and Eno1. These findings were further confirmed by the results of the in-silico assay, which assessed the stability of the complexes. Moreover, the inhibition of hypha of this kind of compound could be attributed to their effect on the catalytic subunit of 1,3-β-d-glucan synthase, 1,3-β-d-glucan-UDP glucosyltransferase and glycosyl-phosphatidylinositol protein, rather than inhibiting ergosterol biosynthesis and Eno1 activity by Induced-Fit Docking and Molecular Dynamics Simulations. This study presents potential antifungal agents with synergistic effects that can effectively inhibit hypha formation. It also provides new insights into the MoA.
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Affiliation(s)
- Heyang Zhou
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
| | - Niao Yang
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
| | - Wei Li
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
| | - Xuemi Peng
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
| | - Jiaxiao Dong
- School of Pharmacy, Anhui Medical University, Hefei 230022, China
| | - Yuanying Jiang
- Department of Pharmacy, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200072, China;
| | - Lan Yan
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
| | - Dazhi Zhang
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
| | - Yongsheng Jin
- School of Pharmacy, Naval Medical University, Shanghai 200433, China; (H.Z.); (L.Y.)
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3
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Raveenthrarajan D, Satkunarajah T, Kostiuk BA, Adler MJ. Direct Alkylative Amination Using 1-Allylsilatrane. Chemistry 2023; 29:e202301063. [PMID: 37252754 DOI: 10.1002/chem.202301063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 05/31/2023]
Abstract
Homoallylic amines prepared via addition of allylsilanes often require preformed imine substrates, metal catalysts, fluoride activators, or use of protected amines. In this metal-free, air- and water-tolerant procedure, aromatic aldehyde and aniline substrates undergo direct alkylative amination using easily accessible 1-allylsilatrane.
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Affiliation(s)
- David Raveenthrarajan
- Department of Chemistry & Biology, Toronto Metropolitan University, 350 Victoria St., Toronto, ON, M5B 2K3, Canada
| | - Thershan Satkunarajah
- Department of Chemistry & Biology, Toronto Metropolitan University, 350 Victoria St., Toronto, ON, M5B 2K3, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC, H3A 0B8, Canada
| | - Brooklyn A Kostiuk
- Department of Chemistry & Biology, Toronto Metropolitan University, 350 Victoria St., Toronto, ON, M5B 2K3, Canada
| | - Marc J Adler
- Department of Chemistry & Biology, Toronto Metropolitan University, 350 Victoria St., Toronto, ON, M5B 2K3, Canada
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4
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Zhang X, Yang Z, Xu H, Liu Y, Yang X, Sun T, Lu X, Shi F, Yang Q, Chen W, Duan H, Ling Y. Synthesis, Antifungal Activity, and 3D-QASR of Novel 1,2,3,4-Tetrahydroquinoline Derivatives Containing a Pyrimidine Ether Scaffold as Chitin Synthase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:9262-9275. [PMID: 35862625 DOI: 10.1021/acs.jafc.2c01348] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The introduction of active groups of natural products into the framework of pesticide molecules is an effective approach for discovering active lead compounds, and thus has been widely used in the development of new agrochemicals. In this work, a novel series of 1,2,3,4-tetrahydroquinoline derivatives containing a pyrimidine ether scaffold were designed and synthesized by the active substructure splicing method. The new compounds showed good antifungal activities against several fungi. Especially, compound 4fh displayed excellent in vitro activity against Valsa mali and Sclerotinia sclerotiorum with EC50 values of 0.71 and 2.47 μg/mL, respectively. 4fh had slightly stronger inhibitory activity (68.08% at 50 μM) against chitin synthase (CHS) than that of polyoxin D (63.84% at 50 μM) and exhibited obvious curative and protective effects on S. sclerotiorum in vivo. Thus, 4fh can be considered as a new candidate fungicide as a chitin synthase inhibitor. An accurate and reliable three-dimensional quantitative structure-activity relationship (3D-QSAR) model presented a useful direction for the further excogitation of more highly active fungicides. Molecular docking revealed that the conventional hydrogen bond mainly affected the binding affinity of 4fh with chitin synthase. The present results will provide a guidance to discover potential CHS-based fungicides for plant disease control in agriculture.
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Affiliation(s)
- Xiaoming Zhang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Zhaokai Yang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Huan Xu
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Yuansheng Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xinling Yang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Tengda Sun
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Xingxing Lu
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Fasheng Shi
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Qing Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wei Chen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hongxia Duan
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Yun Ling
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
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Zhang X, Xu H, Su H, Yang X, Sun T, Lu X, Shi F, Duan H, Liu X, Ling Y. Design, Synthesis, and Biological Activity of Novel Fungicides Containing a 1,2,3,4-Tetrahydroquinoline Scaffold and Acting as Laccase Inhibitors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1776-1787. [PMID: 35128930 DOI: 10.1021/acs.jafc.1c06595] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Laccase is a novel target for fungicides. We previously developed a new fungicide, 4-chlorocinnamaldehyde thiosemicarbazide (PMDD-5Y), as a laccase inhibitor. The introduction of active groups of natural products into the framework of a pesticide molecular structure is an effective method for discovering active lead compounds, and it has applications in the discovery of new pesticides. In this work, PMDD-5Y was selected as a lead compound, and we designed and synthesized a series of novel sulfonyl hydrazide derivatives containing the natural product scaffold 1,2,3,4-tetrahydroquinoline. The new compounds had antifungal activities against several fungi, especially Valsa mali and Sclerotinia sclerotiorum. One compound (4bl) displayed very good in vitro activity against S. sclerotiorum and V. mali, with EC50 values of 3.32 and 2.78 μg/mL, respectively. The results of an enzyme activity assay showed that 4bh had the best inhibitory activity against laccase, with an EC50 value of 14.85 μg/mL. This was more active than the lead compound PMDD-5Y and the positive control cysteine. Using a molecular docking method, we studied the binding mode of the title compounds with laccase. The structural features of these new laccase inhibitors as fungicides will advance research and impact the field of discovering more potent fungicides to control diseases in agriculture.
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Affiliation(s)
- Xiaoming Zhang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Huan Xu
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Huifei Su
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Xinling Yang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Tengda Sun
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Xingxing Lu
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Fasheng Shi
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Hongxia Duan
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Xili Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712110, China
| | - Yun Ling
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
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6
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El‐Shahat M. Advances in the reduction of quinolines to 1,2,3,4‐tetrahydroquinolines. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mahmoud El‐Shahat
- Photochemistry Department Chemical Industries Research Institute, National Research Centre, Scopus affiliation ID 60014618 Giza Egypt
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7
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Saleh MA, El-Badry MA, R Ezz Eldin R. Novel 6-hydroxyquinolinone derivatives: Design, synthesis, antimicrobial evaluation, in silico study and toxicity profiling. J Comput Chem 2021; 42:1561-1578. [PMID: 34041765 DOI: 10.1002/jcc.26693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/09/2021] [Indexed: 11/07/2022]
Abstract
Infectious diseases of bacteria and fungi have become a major risk to public health because of antibiotic and antifungal resistance. However, the availability of effective antibacterial and antifungal agents is becoming increasingly limited with growing resistance to existing drugs. In response to that, novel agents are critically needed to overcome such resistance. A new series of 6-hydroxyquinolinone 3, 4, 5a, 5b, 6a and 6b bearing different side chains were synthesized and evaluated as antimicrobials against numbers of bacteria and fungi, using inhibition zone technique. As one of these derivatives, compound 3 was identified as a potent antibacterial and antifungal agent against all tested microorganisms with good minimum inhibitory concentration values comparable to reference drugs. Molecular docking studies were performed on antibacterial and antifungal targets; microbial DNA gyrase B of Staphylococcus aureus (PDB ID: 4URO); N-myristoyltransferase of Candida albicans (PDB ID: 1IYK), respectively, to predict the most probable type of interaction at the active site of the target protein in addition to binding affinities and orientations of docked ligands. Additionally, in silico prediction in terms of detailed physicochemical ADME and toxicity profile relating drug-likeness as well as medicinal chemistry friendliness was performed to all synthesized compounds. The results indicated that a novel 4,6-dihydroxyquinolin-2(1H)-one (3) is likely to be a newly synthesized drug candidate, indicating low toxicity in addition to good in silico absorption. In order to pave the way for more logical production of such compounds, structure-activity and toxicity relationships are also discussed.
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Affiliation(s)
- Marwa A Saleh
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt
| | - Mohamed A El-Badry
- Department of Botany and Microbiology, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt
| | - Rogy R Ezz Eldin
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Port Said University, Port Said, Egypt
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8
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Nguyen S, Truong JQ, Bruning JB. Targeting Unconventional Pathways in Pursuit of Novel Antifungals. Front Mol Biosci 2021; 7:621366. [PMID: 33511160 PMCID: PMC7835888 DOI: 10.3389/fmolb.2020.621366] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/11/2020] [Indexed: 01/31/2023] Open
Abstract
The impact of invasive fungal infections on human health is a serious, but largely overlooked, public health issue. Commonly affecting the immunocompromised community, fungal infections are predominantly caused by species of Candida, Cryptococcus, and Aspergillus. Treatments are reliant on the aggressive use of pre-existing antifungal drug classes that target the fungal cell wall and membrane. Despite their frequent use, these drugs are subject to unfavorable drug-drug interactions, can cause undesirable side-effects and have compromised efficacy due to the emergence of antifungal resistance. Hence, there is a clear need to develop novel classes of antifungal drugs. A promising approach involves exploiting the metabolic needs of fungi by targeted interruption of essential metabolic pathways. This review highlights potential antifungal targets including enolase, a component of the enolase-plasminogen complex, and enzymes from the mannitol biosynthesis and purine nucleotide biosynthesis pathways. There has been increased interest in the enzymes that comprise these particular pathways and further investigation into their merits as antifungal targets and roles in fungal survival and virulence are warranted. Disruption of these vital processes by targeting unconventional pathways with small molecules or antibodies may serve as a promising approach to discovering novel classes of antifungals.
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Affiliation(s)
- Stephanie Nguyen
- Institute of Photonics and Advanced Sensing (IPAS), School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Jia Q Truong
- School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - John B Bruning
- Institute of Photonics and Advanced Sensing (IPAS), School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
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9
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Antonova AS, Vinokurova MA, Kumandin PA, Merkulova NL, Sinelshchikova AA, Grigoriev MS, Novikov RA, Kouznetsov VV, Polyanskii KB, Zubkov FI. Application of New Efficient Hoveyda-Grubbs Catalysts Comprising an N→Ru Coordinate Bond in a Six-Membered Ring for the Synthesis of Natural Product-Like Cyclopenta[ b]furo[2,3- c]pyrroles. Molecules 2020; 25:E5379. [PMID: 33213018 PMCID: PMC7709010 DOI: 10.3390/molecules25225379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 12/02/2022] Open
Abstract
The ring rearrangement metathesis (RRM) of a trans-cis diastereomer mixture of methyl 3-allyl-3a,6-epoxyisoindole-7-carboxylates derived from cheap, accessible and renewable furan-based precursors in the presence of a new class of Hoveyda-Grubbs-type catalysts, comprising an N→Ru coordinate bond in a six-membered ring, results in the difficult-to-obtain natural product-like cyclopenta[b]furo[2,3-c]pyrroles. In this process, only one diastereomer with a trans-arrangement of the 3-allyl fragment relative to the 3a,6-epoxy bridge enters into the rearrangement, while the cis-isomers polymerize almost completely under the same conditions. The tested catalysts are active in the temperature range from 60 to 120 °C at a concentration of 0.5 mol % and provide better yields of the target tricycles compared to the most popular commercially available second-generation Hoveyda-Grubbs catalyst. The diastereoselectivity of the intramolecular Diels-Alder reaction furan (IMDAF) reaction between starting 1-(furan-2-yl)but-3-en-1-amines and maleic anhydride, leading to 3a,6-epoxyisoindole-7-carboxylates, was studied as well.
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Affiliation(s)
- Alexandra S. Antonova
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Marina A. Vinokurova
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Pavel A. Kumandin
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Natalia L. Merkulova
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Anna A. Sinelshchikova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russia; (A.A.S.); (M.S.G.)
| | - Mikhail S. Grigoriev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russia; (A.A.S.); (M.S.G.)
| | - Roman A. Novikov
- V. A. Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street, 32, 119991 Moscow, Russia;
| | - Vladimir V. Kouznetsov
- Laboratorio de Química Orgánica y Biomolecular, CMN, Universidad Industrial de Santander, Parque Tecnológico Guatiguara, Km 2 vía refugio, Piedecuesta A.A. 681011, Colombia;
| | - Kirill B. Polyanskii
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Fedor I. Zubkov
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
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10
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Chaudhari TY, Mallampudi NA, Bansal D, Mohapatra DK, Tandon V. Protecting-Group-Directed Diastereoselective Synthesis of Substituted Tetrahydropyrroloquinolines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - N. Arjunreddy Mallampudi
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
| | - Deepak Bansal
- Institute of Resource Ecology; Helmholtz-Zentrum Dresden-Rossendorf; Bautzner Landstraße 400 01328 Dresden Germany
| | - Debendra K. Mohapatra
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
| | - Vibha Tandon
- Special Centre for Molecular Medicine; Jawaharlal Nehru University; 110067 New Delhi India
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11
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Cieslik W, Szczepaniak J, Krasowska A, Musiol R. Antifungal Styryloquinolines as Candida albicans Efflux Pump Inhibitors: Styryloquinolines are ABC Transporter Inhibitors. Molecules 2020; 25:molecules25020345. [PMID: 31952124 PMCID: PMC7024281 DOI: 10.3390/molecules25020345] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/09/2020] [Accepted: 01/11/2020] [Indexed: 12/21/2022] Open
Abstract
Styrylquinolines are heterocyclic compounds that are known for their antifungal and antimicrobial activity. Metal complexation through hydroxyl groups has been claimed to be a plausible mechanism of action for these types of compounds. A series of novel structures with protected hydroxyl groups have been designed and synthesized to verify the literature data. Their antifungal activity against wild-type Candida albicans strain and mutants with silenced efflux pumps activity has been determined. Combinations with fluconazole revealed synergistic interactions that were dependent on the substitution pattern. These results open a new route for designing active antifungal agents on a styrylquinoline scaffold.
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Affiliation(s)
- Wioleta Cieslik
- Institute of Chemistry, University of Silesia, 75. Pułku Piechoty 1, 41-500 Chorzów, Poland;
| | - Joanna Szczepaniak
- Department of Biotransformation, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, 50-383 Wroclaw, Poland; (J.S.); (A.K.)
| | - Anna Krasowska
- Department of Biotransformation, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, 50-383 Wroclaw, Poland; (J.S.); (A.K.)
| | - Robert Musiol
- Institute of Chemistry, University of Silesia, 75. Pułku Piechoty 1, 41-500 Chorzów, Poland;
- Correspondence: ; Tel.: +48‐32‐3497726; Fax: +48‐32‐259‐99‐78
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12
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Synthesis and Identification of Pentathiepin-Based Inhibitors of Sporothrix brasiliensis. Antibiotics (Basel) 2019; 8:antibiotics8040249. [PMID: 31816950 PMCID: PMC6963766 DOI: 10.3390/antibiotics8040249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 11/25/2019] [Accepted: 11/30/2019] [Indexed: 12/13/2022] Open
Abstract
Sporothrix brasiliensis is the causative agent of zoonotic sporotrichosis in Brazil and is currently referred to as the most virulent species among those of clinical importance within the genus. Sporotrichosis is an emergent disease that has come to the forefront over two decades with a recent hot spot of sporotrichosis infection emerging in the state of Rio de Janeiro. The source of these infections is now at epidemic proportions with more than 4000 cases reported in Rio de Janeiro, Brazil, alone since 1998. We developed a focused library of a rare pentathiepin ring system and identified a potent substitution pattern that yielded compounds 21 and 22. These compounds were more potent than itraconazole which is the current standard of care for sporotrichosis.
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13
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Shally, Althagafi I, Singhal D, Panwar R, Shaw R, Elagamy A, Pratap R. Base-promoted regioselective synthesis of 1,2,3,4-terahydroquinolines and quinolines from N-boc-3-piperidone. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Zhang XL, Wu QP, Zhang QS. A Multicomponent Reaction of Acetals for the Preparation of Quinolines. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751913x13814036942713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Xue-Lin Zhang
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Qin-Pei Wu
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Qing-Shan Zhang
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
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15
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Cortés JCG, Curto MÁ, Carvalho VSD, Pérez P, Ribas JC. The fungal cell wall as a target for the development of new antifungal therapies. Biotechnol Adv 2019; 37:107352. [PMID: 30797093 DOI: 10.1016/j.biotechadv.2019.02.008] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/23/2019] [Accepted: 02/16/2019] [Indexed: 12/17/2022]
Abstract
In the past three decades invasive mycoses have globally emerged as a persistent source of healthcare-associated infections. The cell wall surrounding the fungal cell opposes the turgor pressure that otherwise could produce cell lysis. Thus, the cell wall is essential for maintaining fungal cell shape and integrity. Given that this structure is absent in host mammalian cells, it stands as an important target when developing selective compounds for the treatment of fungal infections. Consequently, treatment with echinocandins, a family of antifungal agents that specifically inhibits the biosynthesis of cell wall (1-3)β-D-glucan, has been established as an alternative and effective antifungal therapy. However, the existence of many pathogenic fungi resistant to single or multiple antifungal families, together with the limited arsenal of available antifungal compounds, critically affects the effectiveness of treatments against these life-threatening infections. Thus, new antifungal therapies are required. Here we review the fungal cell wall and its relevance in biotechnology as a target for the development of new antifungal compounds, disclosing the most promising cell wall inhibitors that are currently in experimental or clinical development for the treatment of some invasive mycoses.
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Affiliation(s)
- Juan Carlos G Cortés
- Instituto de Biología Funcional y Genómica and Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, Salamanca, Spain.
| | - M-Ángeles Curto
- Instituto de Biología Funcional y Genómica and Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, Salamanca, Spain
| | - Vanessa S D Carvalho
- Instituto de Biología Funcional y Genómica and Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, Salamanca, Spain
| | - Pilar Pérez
- Instituto de Biología Funcional y Genómica and Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, Salamanca, Spain
| | - Juan Carlos Ribas
- Instituto de Biología Funcional y Genómica and Departamento de Microbiología y Genética, Consejo Superior de Investigaciones Científicas (CSIC)/Universidad de Salamanca, Salamanca, Spain.
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16
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17
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Noureldin NA, Kothayer H, Lashine ESM, Baraka MM, Huang Y, Li B, Ji Q. Design, synthesis and biological evaluation of novel quinazoline-2,4-diones conjugated with different amino acids as potential chitin synthase inhibitors. Eur J Med Chem 2018; 152:560-569. [DOI: 10.1016/j.ejmech.2018.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 04/15/2018] [Accepted: 05/02/2018] [Indexed: 10/17/2022]
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18
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Jiang Y, Schaus SE. Asymmetric Petasis Borono-Mannich Allylation Reactions Catalyzed by Chiral Biphenols. Angew Chem Int Ed Engl 2017; 56:1544-1548. [PMID: 28052567 PMCID: PMC5716625 DOI: 10.1002/anie.201611332] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 12/25/2022]
Abstract
Chiral biphenols catalyze the asymmetric Petasis borono-Mannich allylation of aldehydes and amines through the use of a bench-stable allyldioxaborolane. The reaction proceeds via a two-step, one-pot process and requires 2-8 mole % of 3,3'-Ph2 -BINOL as the optimal catalyst. Under microwave heating the reaction affords chiral homoallylic amines in excellent yields (up to 99 %) and high enantioselectivies (er up to 99:1). The catalytic reaction is a true multicomponent condensation reaction whereas both the aldehyde and the amine can possess a wide range of structural and electronic properties. Use of crotyldioxaborolane in the reaction results in stereodivergent products with anti- and syn-diastereomers both in good diastereoselectivities and enantioselectivities from the corresponding E- and Z-borolane stereoisomers.
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Affiliation(s)
- Yao Jiang
- Department of Chemistry, Center for Molecular Discovery, Boston University, 24 Cummington Mall, Boston, MA, 02215, USA
| | - Scott E Schaus
- Department of Chemistry, Center for Molecular Discovery, Boston University, 24 Cummington Mall, Boston, MA, 02215, USA
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19
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Pharmacophore modeling and 3D QSAR studies of aryl amine derivatives as potential lumazine synthase inhibitors. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.05.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Tetrazolylmethyl quinolines: Design, docking studies, synthesis, anticancer and antifungal analyses. Eur J Med Chem 2017; 128:258-273. [PMID: 28192709 DOI: 10.1016/j.ejmech.2017.01.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 01/25/2017] [Accepted: 01/28/2017] [Indexed: 12/27/2022]
Abstract
A new series of 2,5 and 1,5-regioisomers of the tetrazolyl group viz., 3-[(5-benzyl/benzylthio-2H-tetrazol-2-yl) methyl]-2-chloro-6-substituted quinoline 6h-q and 3-[(5-benzyl/benzylthio-1H-tetrazol-1-yl) methyl]-2-chloro-6-substituted quinolines 7h-q were synthesized. Docking studies of all these compounds with DNA as target using PDB: 1AU5 and 453D revealed that the compounds 6h and 6i act as covalent cross linker on the DNA helix of the former and intercalate the latter both with higher C score values. Another set of docking studies in the active pocket of dihydrofolate reductase and N-myristoyl transferase as targets to assess antifungal activity revealed that compounds 6k, 6l, 6p and 7q (with bromo and fluro substituents) showcases different binding modes and hydrogen bonding. Further, the compounds were screened for anticancer activity (primary cytotoxicity) against NCI-60 Human tumor cell line at a single high dose (10-5 M) concentration assay. Among the tested compounds, 6h has shown 99.28% of GI against Melanoma (SK-MEL-5) and compound 6i has shown 97.56% of GI against Breast Cancer (T-47D). Further, in vitro antifungal assay against A. fumigatus and C. albicans for these compounds 6h-q and 7h-q revealed potential to moderate activities as compared to the standard.
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21
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Jiang Y, Schaus SE. Asymmetric Petasis Borono-Mannich Allylation Reactions Catalyzed by Chiral Biphenols. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611332] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yao Jiang
- Department of Chemistry, Center for Molecular Discovery; Boston University; 24 Cummington Mall Boston MA 02215 USA
| | - Scott E. Schaus
- Department of Chemistry, Center for Molecular Discovery; Boston University; 24 Cummington Mall Boston MA 02215 USA
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22
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Trillo P, Pastor IM. Iron-Based Imidazolium Salts as Versatile Catalysts for the Synthesis of Quinolines and 2- and 4-Allylanilines by Allylic Substitution of Alcohols. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600315] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Paz Trillo
- Department of Organic Chemistry; Faculty of Science and Instituto de Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Isidro M. Pastor
- Department of Organic Chemistry; Faculty of Science and Instituto de Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
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23
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Cheung CW, Hu X. Amine synthesis via iron-catalysed reductive coupling of nitroarenes with alkyl halides. Nat Commun 2016; 7:12494. [PMID: 27515391 PMCID: PMC4990657 DOI: 10.1038/ncomms12494] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 07/07/2016] [Indexed: 11/30/2022] Open
Abstract
(Hetero)Aryl amines, an important class of organic molecules in medicinal chemistry, are most commonly synthesized from anilines, which are in turn synthesized by hydrogenation of nitroarenes. Amine synthesis directly from nitroarenes is attractive due to improved step economy and functional group compatibility. Despite these potential advantages, there is yet no general method for the synthesis of (hetero)aryl amines by carbon–nitrogen cross-coupling of nitroarenes. Here we report the reductive coupling of nitroarenes with alkyl halides to yield (hetero)aryl amines. A simple iron catalyst enables the coupling with numerous primary, secondary and tertiary alkyl halides. Broad scope and high functional group tolerance are demonstrated. Mechanistic study suggests that nitrosoarenes and alkyl radicals are involved as intermediates. This new C–N coupling method provides general and step-economical access to aryl amines. Direct synthesis of aryl amines from nitroarenes avoids the waste and potential functional group incompatibility of first reducing to anilines. Here, the authors report an iron catalysed reductive coupling of nitroarenes with alkyl halides to form a wide range of (hetero)aromatic amines.
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Affiliation(s)
- Chi Wai Cheung
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, 1015 Lausanne, Switzerland
| | - Xile Hu
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, 1015 Lausanne, Switzerland
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24
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Rational design, synthesis, anti-HIV-1 RT and antimicrobial activity of novel 3-(6-methoxy-3,4-dihydroquinolin-1(2H)-yl)-1-(piperazin-1-yl)propan-1-one derivatives. Bioorg Chem 2016; 67:75-83. [DOI: 10.1016/j.bioorg.2016.05.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 05/29/2016] [Accepted: 05/31/2016] [Indexed: 11/18/2022]
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25
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Lei P, Zhang X, Xu Y, Xu G, Liu X, Yang X, Zhang X, Ling Y. Synthesis and fungicidal activity of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline. Chem Cent J 2016; 10:40. [PMID: 27382411 PMCID: PMC4932680 DOI: 10.1186/s13065-016-0186-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 06/20/2016] [Indexed: 12/02/2022] Open
Abstract
Background Take-all of wheat, caused by the soil-borne fungus Gaeumannomyces graminis var. tritici, is one of the most important and widespread root diseases. Given that take-all is still hard to control, it is necessary to develop new effective agrochemicals. Pyrazole derivatives have been often reported for their favorable bioactivities. In order to discover compounds with high fungicidal activity and simple structures, 1,2,3,4-tetrahydroquinoline, a biologically active group of natural products, was introduced to pyrazole structure. A series of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline were synthesized, and their fungicidal activities were evaluated. Results The bioassay results demonstrated that the title compounds displayed obvious fungicidal activities at a concentration of 50 μg/mL, especially against V. mali, S. sclerotiorum and G. graminis var. tritici. The inhibition rates of compounds 10d, 10e, 10h, 10i and 10j against G. graminis var. tritici were all above 90 %. Even at a lower concentration of 16.7 μg/mL, compounds 10d and 10e exhibited satisfied activities of 100 % and 94.0 %, respectively. It is comparable to that of the positive control pyraclostrobin with 100 % inhibition rate. Conclusion A series of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline were synthesized and their structures were confirmed by 1H NMR, 13C NMR, IR spectrum and HRMS or elemental analysis. The crystal structure of compound 10g was confirmed by X-ray diffraction. Bioassay results indicated that all title compounds exhibited obvious fungicidal activities. In particular, compounds 10d and 10e showed comparable activities against G. graminis var. tritici with the commercial fungicide pyraclostrobin at the concentration of 16.7 μg/mL.A series of pyrazole derivatives containing 1,2,3,4-tetrahydroquinoline were designed and synthesized. Bioassay results indicated that all these compounds exhibited obvious fungicidal activities. ![]() Electronic supplementary material The online version of this article (doi:10.1186/s13065-016-0186-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Peng Lei
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Xuebo Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Yan Xu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Gaofei Xu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Xili Liu
- Department of Plant Pathology, China Agricultural University, Beijing, 100193 China
| | - Xinling Yang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Xiaohe Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
| | - Yun Ling
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193 China
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Lei P, Xu Y, Du J, Yang XL, Yuan HZ, Xu GF, Ling Y. Design, synthesis and fungicidal activity of N-substituted benzoyl-1,2,3,4-tetrahydroquinolyl-1-carboxamide. Bioorg Med Chem Lett 2016; 26:2544-2546. [DOI: 10.1016/j.bmcl.2016.03.085] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 03/03/2016] [Accepted: 03/25/2016] [Indexed: 11/30/2022]
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27
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Chander S, Ashok P, Zheng YT, Wang P, Raja KS, Taneja A, Murugesan S. Design, synthesis and in-vitro evaluation of novel tetrahydroquinoline carbamates as HIV-1 RT inhibitor and their antifungal activity. Bioorg Chem 2016; 64:66-73. [DOI: 10.1016/j.bioorg.2015.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 12/16/2015] [Accepted: 12/16/2015] [Indexed: 10/22/2022]
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28
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Sun YM, Gu P, Gao YN, Xu Q, Shi M. Gold(i) catalyzed tandem cyclization of propargylic esters to 4-acyloxy-1,2-dihydroquinolines. Chem Commun (Camb) 2016; 52:6942-5. [DOI: 10.1039/c6cc03132c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gold catalyzed tandem [3,3]-rearrangement and intramolecular hydroamination of propargylic esters has been disclosed in this communication, producing a series of 4-acyloxy-1,2-dihydroquinolines in good yields and high enantioselectivities.
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Affiliation(s)
- Yuan-Ming Sun
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology, and 130 MeiLong Road
- Shanghai 200237
- P. R. China
| | - Peng Gu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology, and 130 MeiLong Road
- Shanghai 200237
- P. R. China
| | - Yu-Ning Gao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology, and 130 MeiLong Road
- Shanghai 200237
- P. R. China
| | - Qin Xu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology, and 130 MeiLong Road
- Shanghai 200237
- P. R. China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology, and 130 MeiLong Road
- Shanghai 200237
- P. R. China
- State Key Laboratory of Organometallic Chemistry
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One-pot organocatalytic enantioselective Michael addition and aza-cyclization/dehydration cascade reaction strategy: asymmetric synthesis of highly functionalized 1,4-dihydroquinolines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.071] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Lee Y, Heo S, Kim SG. Asymmetric One-Pot Synthesis of 1,4-Dihydroquinolines via an Organocatalytic Aza-Michael/Michael Cascade Strategy. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401176] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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31
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Duran LTD, Rincón NO, Galvis CEP, Kouznetsov VV, Lorenzo JLF. Genotoxicity risk assessment of diversely substituted quinolines using the SOS chromotest. ENVIRONMENTAL TOXICOLOGY 2015; 30:278-292. [PMID: 24106140 DOI: 10.1002/tox.21905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Revised: 08/06/2013] [Accepted: 08/12/2013] [Indexed: 06/02/2023]
Abstract
Quinolines are aromatic nitrogen compounds with wide therapeutic potential to treat parasitic and microbial diseases. In this study, the genotoxicity of quinoline, 4-methylquinoline, 4-nitroquinoline-1-oxide (4-NQO), and diversely functionalized quinoline derivatives and the influence of the substituents (functional groups and/or atoms) on their genotoxicity were tested using the SOS chromotest. Quinoline derivatives that induce genotoxicity by the formation of an enamine epoxide structure did not induce the SOS response in Escherichia coli PQ37 cells, with the exception of 4-methylquinoline that was weakly genotoxic. The chemical nature of the substitution (C-5 to C-8: hydroxyl, nitro, methyl, isopropyl, chlorine, fluorine, and iodine atoms; C-2: phenyl and 3,4-methylenedioxyphenyl rings) of quinoline skeleton did not significantly modify compound genotoxicities; however, C-2 substitution with α-, β-, or γ-pyridinyl groups removed 4-methylquinoline genotoxicity. On the other hand, 4-NQO derivatives whose genotoxic mechanism involves reduction of the C-4 nitro group were strong inducers of the SOS response. Methyl and nitrophenyl substituents at C-2 of 4-NQO core affected the genotoxic potency of this molecule. The relevance of these results is discussed in relation to the potential use of the substituted quinolines. The work showed the sensitivity of SOS chromotest for studying structure-genotoxicity relationships and bioassay-guided quinoline synthesis.
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Affiliation(s)
- Leidy Tatiana Díaz Duran
- Laboratorio de Microbiología y Mutagénesis Ambiental, Escuela de Biología, Facultad de Ciencias, Universidad Industrial de Santander, Bucaramanga, Colombia
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Medina Marrero R, Marrero-Ponce Y, Barigye SJ, Echeverría Díaz Y, Acevedo-Barrios R, Casañola-Martín GM, García Bernal M, Torrens F, Pérez-Giménez F. QuBiLs-MAS method in early drug discovery and rational drug identification of antifungal agents. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2015; 26:943-58. [PMID: 26567876 DOI: 10.1080/1062936x.2015.1104517] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The QuBiLs-MAS approach is used for the in silico modelling of the antifungal activity of organic molecules. To this effect, non-stochastic (NS) and simple-stochastic (SS) atom-based quadratic indices are used to codify chemical information for a comprehensive dataset of 2478 compounds having a great structural variability, with 1087 of them being antifungal agents, covering the broadest antifungal mechanisms of action known so far. The NS and SS index-based antifungal activity classification models obtained using linear discriminant analysis (LDA) yield correct classification percentages of 90.73% and 92.47%, respectively, for the training set. Additionally, these models are able to correctly classify 92.16% and 87.56% of 706 compounds in an external test set. A comparison of the statistical parameters of the QuBiLs-MAS LDA-based models with those for models reported in the literature reveals comparable to superior performance, although the latter were built over much smaller and less diverse datasets, representing fewer mechanisms of action. It may therefore be inferred that the QuBiLs-MAS method constitutes a valuable tool useful in the design and/or selection of new and broad spectrum agents against life-threatening fungal infections.
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Affiliation(s)
- R Medina Marrero
- a Computer-Aided Molecular 'Biosilico' Discovery and Bioinformatic Research International Network (CAMD-BIR-IN) , Cartagena de Indias , Bolivar , Colombia
- b Department of Microbiology , Chemical Bioactive Center, Central University of Las Villas , Villa Clara , Cuba
| | - Y Marrero-Ponce
- a Computer-Aided Molecular 'Biosilico' Discovery and Bioinformatic Research International Network (CAMD-BIR-IN) , Cartagena de Indias , Bolivar , Colombia
- c Grupo de Investigación en Estudios Químicos y Biológicos, Facultad de Ciencias Básicas , Universidad Tecnológica de Bolívar , Cartagena de Indias , Bolívar , Colombia
- d Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia , Universitat de València , Valencia , Spain
- h Grupo de Investigación Microbiología y Ambiente (GIMA) . Programa de Bacteriología, Facultad Ciencias de la Salud, Universidad de San Buenaventura , Calle Real de Ternera, 130010, Cartagena (Bolivar) , Colombia
| | - S J Barigye
- a Computer-Aided Molecular 'Biosilico' Discovery and Bioinformatic Research International Network (CAMD-BIR-IN) , Cartagena de Indias , Bolivar , Colombia
- e Departamento de Química , Universidade Federal de Lavras , Lavras , MG , Brazil
| | - Y Echeverría Díaz
- a Computer-Aided Molecular 'Biosilico' Discovery and Bioinformatic Research International Network (CAMD-BIR-IN) , Cartagena de Indias , Bolivar , Colombia
| | - R Acevedo-Barrios
- c Grupo de Investigación en Estudios Químicos y Biológicos, Facultad de Ciencias Básicas , Universidad Tecnológica de Bolívar , Cartagena de Indias , Bolívar , Colombia
| | - G M Casañola-Martín
- a Computer-Aided Molecular 'Biosilico' Discovery and Bioinformatic Research International Network (CAMD-BIR-IN) , Cartagena de Indias , Bolivar , Colombia
- d Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia , Universitat de València , Valencia , Spain
- f Facultad de Ingeniería Ambiental , Universidad Estatal Amazónica , Puyo , Ecuador
| | - M García Bernal
- b Department of Microbiology , Chemical Bioactive Center, Central University of Las Villas , Villa Clara , Cuba
| | - F Torrens
- g Institut Universitari de Ciència Molecular, Universitat de València , Valencia , Spain
| | - F Pérez-Giménez
- d Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia , Universitat de València , Valencia , Spain
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Lee Y, Kim SG. Asymmetric Organocatalytic Cascade Reaction of Aldehydes with 2-Amino-β-nitrostyrenes: Synthesis of Chiral Tetrahydroquinolines and Dihydroquinolines. J Org Chem 2014; 79:8234-43. [DOI: 10.1021/jo501406v] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yona Lee
- Department of Chemistry,
College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 443-760, Republic of Korea
| | - Sung-Gon Kim
- Department of Chemistry,
College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 443-760, Republic of Korea
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34
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Ma S, Li H, Yan C, Wang D, Li H, Xia X, Dong X, Zhao Y, Sun T, Hu P, Guan W. Antagonistic effect of protein extracts from Streptococcus sanguinis on pathogenic bacteria and fungi of the oral cavity. Exp Ther Med 2014; 7:1486-1494. [PMID: 24926331 PMCID: PMC4043591 DOI: 10.3892/etm.2014.1618] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 02/24/2014] [Indexed: 11/06/2022] Open
Abstract
An antibacterial substance from Streptococcus sanguinis (S. sanguinis) is known to have an inhibitory effect on putative periodontal pathogens, but its inhibitory effect on pathogens of oral candidiasis is unknown. In this study, intracellular and exocrine proteins were extracted from S. sanguinis. The antagonistic effect of the protein extracts on Prevotella intermedia (P. intermedia) and Porphyromonas gingivalis (P. gingivalis) was detected by a well-plate technique, and the effects of the protein extracts on biofilms formed by these bacteria were evaluated by confocal laser scanning microscopy. The antagonistic effect of the protein extracts on pathogenic fungi was investigated using Candida albicans (C. albicans) and Candida tropicalis (C. tropicalis). The growth curves of C. albicans and C. tropicalis were determined from ultraviolet absorption measurements, their morphological changes following treatment were observed by optical microscopy and scanning electron microscopy, and the effects of the protein extracts on the thickness of their biofilms and the distribution of dead/live bacteria within the biofilms were detected by confocal laser scanning microscopy. The results showed significant inhibitory effects of the intracellular proteins extracted from S. sanguinis on pathogenic bacteria (P. intermedia and P. gingivalis), fungi (C. albicans and C. tropicalis) and the biofilms formed by them. Furthermore, the growth curves and morphology of C. albicans and C. tropicalis were altered following treatment with the intracellular proteins, resulting in disc-like depressions in the surfaces of the fungal spores and mycelia. By contrast, the exocrine proteins demonstrated no significant inhibitory effect on the pathogenic bacteria, fungi and the biofilms formed by them. Thus, it may be concluded that intracellular proteins of S. sanguinis have antibacterial activity and exert an antagonistic effect on certain pathogenic bacteria and fungi of the oral cavity.
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Affiliation(s)
- Shengli Ma
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Hui Li
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Chuang Yan
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Dan Wang
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Haiqing Li
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Xue Xia
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Xue Dong
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Yingnan Zhao
- Department of Stomatology, Hospital of Heilongjiang Province, Harbin, Heilongjiang 150036, P.R. China
| | - Tingting Sun
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Pengfei Hu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Weijun Guan
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
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Ding L, Chen J, Hu Y, Xu J, Gong X, Xu D, Zhao B, Li H. Aminative umpolung of aldehydes to α-amino anion equivalents for Pd-catalyzed allylation: an efficient synthesis of homoallylic amines. Org Lett 2014; 16:720-3. [PMID: 24437506 DOI: 10.1021/ol4034012] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An attractive strategy for generation of α-amino anions from aldehydes with applications in synthesis of homoallylic amines is described. Aromatic aldehydes can be converted to α-amino anion equivalents via amination with 2,2-diphenylglycine and subsequent decarboxylation. The in situ generated α-imino anions are highly reactive for Pd-catalyzed allylation, forming the corresponding homoallylic amines in high yields with excellent regioselectivity.
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Affiliation(s)
- Lei Ding
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Lab of Rare Earth Functional Materials, Shanghai Normal University , Shanghai 200234, China
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Pandit RP, Lee YR. Efficient one-pot synthesis of novel and diverse tetrahydroquinolines bearing pyranopyrazoles using organocatalyzed domino Knoevenagel/hetero Diels-Alder reactions. Mol Divers 2013; 18:39-50. [PMID: 24057164 DOI: 10.1007/s11030-013-9482-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 09/01/2013] [Indexed: 11/29/2022]
Abstract
A new synthetic route to biologically interesting diverse tetrahydroquinolines bearing pyranopyrazoles was developed by reacting pyrazolones and N, N-dialkylated aminobenzaldehydes in the presence of EDDA. The key strategy underlying the methodology used was the domino Knoevenagel/hetero Diels-Alder reaction. This synthetic method provides a variety of novel tetrahydroquinolines in good yields.
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Heo S, Kim S, Kim SG. Organocatalytic enantioselective conjugate addition–cyclization domino reactions of o-N-protected aminophenyl α,β-unsaturated aldehydes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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38
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Compain G, Bonneau C, Martin-Mingot A, Thibaudeau S. Selective Anti-Markovnikov Cyclization and Hydrofluorination Reaction in Superacid HF/SbF5: A Tool in the Design of Nitrogen-Containing (Fluorinated) Polycyclic Systems. J Org Chem 2013; 78:4463-72. [DOI: 10.1021/jo400398y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Guillaume Compain
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
| | - Céline Bonneau
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
| | - Agnès Martin-Mingot
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
| | - Sébastien Thibaudeau
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
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Wang X, Wu Z, Zhu X, Ye C, Jiang F, Zhang W. A Pd(II)-Catalyzed Oxidative Cyclization for the Preparation of Aryl-Fused Six-Membered Nitrogen Heterocycles with 2-Acetoxy Functionality. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200963] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Kouznetsov VV, Zacchino SA, Sortino M, Vargas Méndez LY, Gupta MP. Cytotoxic and Antifungal Activities of Diverse α-Naphthylamine Derivatives. Sci Pharm 2012; 80:867-77. [PMID: 23264936 PMCID: PMC3528049 DOI: 10.3797/scipharm.1209-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 10/23/2012] [Indexed: 11/29/2022] Open
Abstract
Diverse α-naphthylamine derivatives were easily prepared from corresponding aldimines derived from commercially available α-naphthaldehyde and anilines or isomeric pyridinecarboxyaldehydes and α-naphthylamine. The secondary amines obtained were tested as possible antifungal and cytotoxic agents. The diverse N-aryl-N-[1-(1-naphthyl)but-3-enyl]amines obtained were active (IC50 < 10 μg/mL) against breast (MCF-7), non-small cell lung (H-460), and central nervous system (SF-268) human cancer cell lines, while N-(pyridinylmethyl)-naphthalen-1-amines resulted in activity against (MIC 25–32 μg/mL) some human opportunistic pathogenic fungi including yeasts, hialohyphomycetes, and dermatophytes.
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Affiliation(s)
- Vladímir V Kouznetsov
- Laboratorio de Química Orgánica y Biomolecular, Escuela de Química, Universidad Industrial de Santander, A. A. 678, Bucaramanga, Colombia
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41
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Olivella M, Marchal A, Nogueras M, Sánchez A, Melguizo M, Raimondi M, Zacchino S, Giannini F, Cobo J, Enriz RD. Structure–activity relationship study of nitrosopyrimidines acting as antifungal agents. Bioorg Med Chem 2012; 20:6109-22. [DOI: 10.1016/j.bmc.2012.08.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 08/08/2012] [Accepted: 08/16/2012] [Indexed: 11/27/2022]
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42
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Zhang Y, Han M, Yan T. Solvent-Free Addition Reaction of Allylzinc Bromide and Aldimines. SYNTHETIC COMMUN 2012. [DOI: 10.1080/00397911.2011.565141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yumei Zhang
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou , China
| | - Minghu Han
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou , China
| | - Tingli Yan
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou , China
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43
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Gwon SH, Kim SG. Asymmetric synthesis of ring-fused tetrahydroquinolines using organocatalytic enantioselective conjugate addition and cross-dehydrogenative coupling. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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44
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45
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Soto-Otero R, Méndez-Álvarez E, Sánchez-Iglesias S, Labandeira-García JL, Rodríguez-Pallares J, Zubkov FI, Zaytsev VP, Voskressensky LG, Varlamov AV, de Candia M, Fiorella F, Altomare C. 2-Benzazepine Nitrones Protect Dopaminergic Neurons against 6-Hydroxydopamine-Induced Oxidative Toxicity. Arch Pharm (Weinheim) 2012; 345:598-609. [DOI: 10.1002/ardp.201200007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 03/08/2012] [Accepted: 03/09/2012] [Indexed: 01/27/2023]
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46
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Sridharan V, Suryavanshi PA, Menéndez JC. Advances in the chemistry of tetrahydroquinolines. Chem Rev 2011; 111:7157-259. [PMID: 21830756 DOI: 10.1021/cr100307m] [Citation(s) in RCA: 765] [Impact Index Per Article: 58.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Vellaisamy Sridharan
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense, Madrid, Spain
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47
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Majerz-Maniecka K, Musiol R, Skórska-Stania A, Tabak D, Mazur P, Oleksyn BJ, Polanski J. X-ray and molecular modelling in fragment-based design of three small quinoline scaffolds for HIV integrase inhibitors. Bioorg Med Chem 2011; 19:1606-12. [DOI: 10.1016/j.bmc.2011.01.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 01/20/2011] [Accepted: 01/21/2011] [Indexed: 01/25/2023]
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48
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Jiang F, Wu Z, Zhang W. Pd(II)-catalyzed oxidative cyclization reaction for the preparation of 2-substituted 1,2,3,4-tetrahydroquinolines with halide functionality. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.12.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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49
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San-Blas G, Burger E. Experimental medical mycological research in Latin America - a 2000-2009 overview. Rev Iberoam Micol 2010; 28:1-25. [PMID: 21167301 DOI: 10.1016/j.riam.2010.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Revised: 11/24/2010] [Accepted: 11/24/2010] [Indexed: 11/26/2022] Open
Abstract
An overview of current trends in Latin American Experimental Medical Mycological research since the beginning of the 21(st) century is done (search from January 2000 to December 2009). Using the PubMed and LILACS databases, the authors have chosen publications on medically important fungi which, according to our opinion, are the most relevant because of their novelty, interest, and international impact, based on research made entirely in the Latin American region or as part of collaborative efforts with laboratories elsewhere. In this way, the following areas are discussed: 1) molecular identification of fungal pathogens; 2) molecular and clinical epidemiology on fungal pathogens of prevalence in the region; 3) cell biology; 4) transcriptome, genome, molecular taxonomy and phylogeny; 5) immunology; 6) vaccines; 7) new and experimental antifungals.
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Affiliation(s)
- Gioconda San-Blas
- Instituto Venezolano de Investigaciones Científicas, Caracas, Venezuela.
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50
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Patti A, Pedotti S. Hydrogenation of ortho-nitrochalcones over Pd/C as a simple access to 2-substituted 1,2,3,4-tetrahydroquinolines. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.05.090] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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