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Luo W, Zhang C, Dong L. Rhodium(III)-Catalyzed Annulation Synthesis of Difluorinated Quinazolinone Derivatives Using an Amide Carbonyl as the Directing Group. J Org Chem 2024; 89:9627-9640. [PMID: 38888955 DOI: 10.1021/acs.joc.3c02596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
The use of amide carbonyl groups of substrates as weakly coordinating directing groups has received a significant amount of attention. Recently, difluoromethylene alkynes have been successfully used in fluorination reactions, resulting in the preparation of various fluorine-containing compounds. This work describes a [4+2] annulation method for creating a range of fluorinated quinolino[2,1-b]quinazolinone derivatives. The derivatives are formed through Rh(III)-catalyzed cascade cyclization of 3-phenylquinazolinones and gem-difluoromethylene alkynes.
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Affiliation(s)
- Wen Luo
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Chao Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Lin Dong
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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2
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Wu J, Zhang M, He J, Li K, Ye L, Zhou J, Xu X, Li Z, Xu H. Electrochemical oxidative decarboxylative of α-oxocarboxylic acids towards the synthesis of quinazolines and quinazolinones. RSC Adv 2024; 14:7551-7556. [PMID: 38440270 PMCID: PMC10910557 DOI: 10.1039/d4ra01318b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 02/27/2024] [Indexed: 03/06/2024] Open
Abstract
A mild and environmentally electrochemical method for the synthesis of quinazolines and quinazolinones has been developed through anodic oxidation decarboxylative of α-oxocarboxylic acids. The present reaction was efficiently conducted by using simple and cheap NH4I as the N-source and electrolyte in an undivided cell. The desired products, quinazolines and quinazolinones, were isolated in high yield under chemical oxidant free conditions.
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Affiliation(s)
- Jiwei Wu
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Fengyang 233100 China
| | - Mengru Zhang
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Fengyang 233100 China
| | - Jun He
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Fengyang 233100 China
| | - Kaixuan Li
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Fengyang 233100 China
| | - Longqiang Ye
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Fengyang 233100 China
| | - Jie Zhou
- School of Food and Biological Engineering, Hefei University of Technology Hefei 230009 China
| | - Xiaolan Xu
- School of Medical Science, Anhui Medical University Hefei 230009 China
| | - Zirong Li
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Fengyang 233100 China
| | - Huajian Xu
- School of Food and Biological Engineering, Hefei University of Technology Hefei 230009 China
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3
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Zong ZM, Zhang L, Li GP, Wang W, Zhao XJ, He Y. Electrochemical-Induced C-N Bond Formation: A New Method to Synthesis ( Z)-Quinazolinone Oximes Using Primary Amines and Quinazolin-4(3 H)-one. Org Lett 2024; 26:1271-1276. [PMID: 38323795 DOI: 10.1021/acs.orglett.4c00107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
A novel and highly selective electrochemical method for the synthesis of diverse quinazolinone oximes via direct electrooxidation of primary amines/C(sp2)-H functionalization of oximes has been developed. The reaction is conducted in an undivided cell under constant current conditions and is oxidant-free, open-air, and eco-friendly. Notably, the protocol shows good functional group tolerance, providing versatile quinazolinone oximes in good yields. Moreover, the mechanism is investigated through control experiments and cyclic voltammogram (CV) experiments.
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Affiliation(s)
- Zhi-Min Zong
- School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China
| | - Lizhu Zhang
- School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China
| | - Gan-Peng Li
- School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China
| | - Wei Wang
- School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China
| | - Xiao-Jing Zhao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China
| | - Yonghui He
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China
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4
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Wu Z, Dou J, Nguyen KU, Eppley JC, Siwawannapong K, Zhang Y, Lindsey JS. Tailoring the AIE Chromogen 2-(2-Hydroxyphenyl)benzothiazole for Use in Enzyme-Triggered Molecular Brachytherapy. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248682. [PMID: 36557815 PMCID: PMC9786593 DOI: 10.3390/molecules27248682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
A targeted strategy for treating cancer is antibody-directed enzyme prodrug therapy, where the enzyme attached to the antibody causes conversion of an inactive small-molecule prodrug into an active drug. A limitation may be the diffusion of the active drug away from the antibody target site. A related strategy with radiotherapeutics entails enzymatically promoted conversion of a soluble to insoluble radiotherapeutic agent, thereby immobilizing the latter at the target site. Such a molecular brachytherapy has been scarcely investigated. In distinct research, the advent of molecular designs for aggregation-induced emission (AIE) suggests translational use in molecular brachytherapy. Here, several 2-(2-hydroxyphenyl)benzothiazole substrates that readily aggregate in aqueous solution (and afford AIE) were elaborated in this regard. In particular, (1) the 2-(2-hydroxyphenyl) unit was derivatized to bear a pegylated phosphodiester that imparts water solubility yet undergoes enzymatic cleavage, and (2) a p-phenol unit was attached to the benzo moiety to provide a reactive site for final-step iodination (here examined with natural abundance iodide). The pegylated phosphodiester-iodinated benzothiazole undergoes conversion from aqueous-soluble to aqueous-insoluble upon treatment with a phosphatase or phosphodiesterase. The aggregation is essential to molecular brachytherapy, whereas the induced emission of AIE is not essential but provides a convenient basis for research development. Altogether, 21 compounds were synthesized (18 new, 3 known via new routes). Taken together, blending biomedical strategies of enzyme prodrug therapy with materials chemistry concerning substances that undergo AIE may comprise a step forward on the long road toward molecular brachytherapy.
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5
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Sajadi MS, Kazemi E, Darehkordi A. Palladium-catalyzed synthesis of novel trifluoromethylated quinazolinone, N-arylquinazoline and N-benzylquinazoline derivatives. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Markovic M, Ben-Shabat S, Dahan A. Computational Simulations to Guide Enzyme-Mediated Prodrug Activation. Int J Mol Sci 2020; 21:ijms21103621. [PMID: 32443905 PMCID: PMC7279318 DOI: 10.3390/ijms21103621] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 12/13/2022] Open
Abstract
Prodrugs are designed to improve pharmaceutical/biopharmaceutical characteristics, pharmacokinetic/pharmacodynamic properties, site-specificity, and more. A crucial step in successful prodrug is its activation, which releases the active parent drug, exerting a therapeutic effect. Prodrug activation can be based on oxidation/reduction processes, or through enzyme-mediated hydrolysis, from oxidoreductases (i.e., Cytochrome P450) to hydrolytic enzymes (i.e., carboxylesterase). This study provides an overview of the novel in silico methods for the optimization of enzyme-mediated prodrug activation. Computational methods simulating enzyme-substrate binding can be simpler like molecular docking, or more complex, such as quantum mechanics (QM), molecular mechanics (MM), and free energy perturbation (FEP) methods such as molecular dynamics (MD). Examples for MD simulations used for elucidating the mechanism of prodrug (losartan, paclitaxel derivatives) metabolism via CYP450 enzyme are presented, as well as an MD simulation for optimizing linker length in phospholipid-based prodrugs. Molecular docking investigating quinazolinone prodrugs as substrates for alkaline phosphatase is also presented, as well as QM and MD simulations used for optimal fit of different prodrugs within the human carboxylesterase 1 catalytical site. Overall, high quality computational simulations may show good agreement with experimental results, and should be used early in the prodrug development process.
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7
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Niu B, Li S, Cui C, Yan Y, Tang L, Wang J. New Strategy for the Synthesis of Heterocycles via Copper-Catalyzed Oxidative Decarboxylative Amination of Glyoxylic Acid. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bin Niu
- School of Food and Biological Engineering; Henan Collaborative Innovation Center of Food Production and Safety; Henan Key Laboratory of Cold Chain Food Quality and Safety Control; Zhengzhou University of Light Industry; 450000 Zhengzhou P. R. China
| | - Shaoqing Li
- School of Food and Biological Engineering; Henan Collaborative Innovation Center of Food Production and Safety; Henan Key Laboratory of Cold Chain Food Quality and Safety Control; Zhengzhou University of Light Industry; 450000 Zhengzhou P. R. China
| | - Chang Cui
- School of Food and Biological Engineering; Henan Collaborative Innovation Center of Food Production and Safety; Henan Key Laboratory of Cold Chain Food Quality and Safety Control; Zhengzhou University of Light Industry; 450000 Zhengzhou P. R. China
| | - Yizhe Yan
- School of Food and Biological Engineering; Henan Collaborative Innovation Center of Food Production and Safety; Henan Key Laboratory of Cold Chain Food Quality and Safety Control; Zhengzhou University of Light Industry; 450000 Zhengzhou P. R. China
| | - Lin Tang
- College of Chemistry and Chemical Engineering; Xinyang Normal University; 464000 Xinyang P. R. China
| | - Jianyong Wang
- School of Light Industry and Engineering; Qilu University of Technology (Shandong Academy of Sciences); 250353 Jinan P. R. China
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8
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Yan Y, Cui C, Wang J, Li S, Tang L, Liu Y. Transition metal-free C-F/C-Cl/C-C cleavage of ClCF 2COONa for the synthesis of heterocycles. Org Biomol Chem 2019; 17:8071-8074. [PMID: 31464338 DOI: 10.1039/c9ob01641d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A transition metal-free and external oxidant-free annulation of substrates having two nitrogen-nucleophilic sites with ClCF2COONa was demonstrated, affording a series of 1,3,5-triazines and quinazolinones in up to 96% yields. Notably, ClCF2COONa was employed as the C1 synthon for valuable heterocycles. Using this protocol, two C-N bonds were formed in one pot via the cleavage of two C-F bonds, one C-Cl bond and one C-C bond. This method avoided the use of a transition metal and an oxidant and generated low toxicity inorganic waste.
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Affiliation(s)
- Yizhe Yan
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
| | - Chang Cui
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
| | - Jianyong Wang
- School of Light Industry and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, P. R. China
| | - Shaoqing Li
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
| | - Lin Tang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P. R. China
| | - Yanqi Liu
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
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9
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Zhu G, Lynn GM, Jacobson O, Chen K, Liu Y, Zhang H, Ma Y, Zhang F, Tian R, Ni Q, Cheng S, Wang Z, Lu N, Yung BC, Wang Z, Lang L, Fu X, Jin A, Weiss ID, Vishwasrao H, Niu G, Shroff H, Klinman DM, Seder RA, Chen X. Albumin/vaccine nanocomplexes that assemble in vivo for combination cancer immunotherapy. Nat Commun 2017; 8:1954. [PMID: 29203865 PMCID: PMC5715147 DOI: 10.1038/s41467-017-02191-y] [Citation(s) in RCA: 214] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 11/13/2017] [Indexed: 01/09/2023] Open
Abstract
Subunit vaccines have been investigated in over 1000 clinical trials of cancer immunotherapy, but have shown limited efficacy. Nanovaccines may improve efficacy but have rarely been clinically translated. By conjugating molecular vaccines with Evans blue (EB) into albumin-binding vaccines (AlbiVax), here we develop clinically promising albumin/AlbiVax nanocomplexes that self-assemble in vivo from AlbiVax and endogenous albumin for efficient vaccine delivery and potent cancer immunotherapy. PET pharmacoimaging, super-resolution microscopies, and flow cytometry reveal almost 100-fold more efficient co-delivery of CpG and antigens (Ags) to lymph nodes (LNs) by albumin/AlbiVax than benchmark incomplete Freund's adjuvant (IFA). Albumin/AlbiVax elicits ~10 times more frequent peripheral antigen-specific CD8+ cytotoxic T lymphocytes with immune memory than IFA-emulsifying vaccines. Albumin/AlbiVax specifically inhibits progression of established primary or metastatic EG7.OVA, B16F10, and MC38 tumors; combination with anti-PD-1 and/or Abraxane further potentiates immunotherapy and eradicates most MC38 tumors. Albumin/AlbiVax nanocomplexes are thus a robust platform for combination cancer immunotherapy.
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Affiliation(s)
- Guizhi Zhu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Geoffrey M Lynn
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, 20892, USA
| | - Orit Jacobson
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Kai Chen
- Molecular Imaging Center, Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Yi Liu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.,School of Engineering, China Pharmaceutical University, Nanjing, 210009, China
| | - Huimin Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Ying Ma
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Fuwu Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Rui Tian
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Qianqian Ni
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Siyuan Cheng
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Zhantong Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.,State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen, 361102, China
| | - Nan Lu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Bryant C Yung
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Zhe Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Lixin Lang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Xiao Fu
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Albert Jin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Ido D Weiss
- Laboratory of Molecular Immunology, NIAID, NIH, Bethesda, MD, 20892, USA
| | - Harshad Vishwasrao
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, MD, USA
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Hari Shroff
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, MD, USA.,Section on High Resolution Optical Imaging, NIBIB, NIH, Bethesda, MD, 20892, USA
| | - Dennis M Klinman
- Cancer and Inflammation Program, National Cancer Institute, Frederick, MD, 21702, USA
| | - Robert A Seder
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, 20892, USA
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.
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10
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Peng F, Tian H, Zhang P, Liu C, Wu X, Yuan X, Yang H, Fu H. Iridium-Catalyzed Enantioselective Synthesis of Dihydroimidazoquinazolinones by Elaborate Tuning of Chiral Cyclic Ligands. Org Lett 2017; 19:6376-6379. [DOI: 10.1021/acs.orglett.7b03230] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fei Peng
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hua Tian
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Pengxiang Zhang
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Can Liu
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xudong Wu
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xi Yuan
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Haijun Yang
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hua Fu
- Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
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11
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Hudwekar AD, Reddy GL, Verma PK, Gupta S, Vishwakarma RA, Sawant SD. Transition Metal-free Single Step Approach for Arylated Pyrazolopyrimidinones and Quinazolinones Using Benzylamines/Benzylalcohols/Benzaldehydes. ChemistrySelect 2017. [DOI: 10.1002/slct.201700896] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Abhinandan D. Hudwekar
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu 180001 India
- Academy of Scientific and Innovative Research; New Delhi India, CSIR-IIIM Communication No: IIIM/2014/2017
| | - G. Lakshma Reddy
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu 180001 India
- Academy of Scientific and Innovative Research; New Delhi India, CSIR-IIIM Communication No: IIIM/2014/2017
| | - Praveen K. Verma
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu 180001 India
| | - Sorav Gupta
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu 180001 India
- Academy of Scientific and Innovative Research; New Delhi India, CSIR-IIIM Communication No: IIIM/2014/2017
| | - Ram A. Vishwakarma
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu 180001 India
| | - Sanghapal D. Sawant
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu 180001 India
- Academy of Scientific and Innovative Research; New Delhi India, CSIR-IIIM Communication No: IIIM/2014/2017
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12
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Venugopala KN, Nayak SK, Gleiser RM, Sanchez-Borzone ME, Garcia DA, Odhav B. Synthesis, Polymorphism, and Insecticidal Activity of Methyl 4-(4-chlorophenyl)-8-iodo-2-methyl-6-oxo-1,6-dihydro-4H-pyrimido[2,1-b]quinazoline-3-Carboxylate Against Anopheles arabiensis Mosquito. Chem Biol Drug Des 2016; 88:88-96. [PMID: 26841246 DOI: 10.1111/cbdd.12736] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/12/2016] [Accepted: 01/26/2016] [Indexed: 11/28/2022]
Abstract
Mosquitoes are the major vectors of pathogens and parasites including those causing malaria, the most deadly vector-borne disease. The negative environmental effects of most synthetic compounds combined with widespread development of insecticide resistance encourage an interest in finding and developing alternative products against mosquitoes. In this study, pyrimido[2,1-b]quinazoline derivative DHPM3 has been synthesized by three-step chemical reaction and screened for larvicide, adulticide, and repellent properties against Anopheles arabiensis, one of the dominant vectors of malaria in Africa. The title compound emerged as potential larvicide agent for further research and development, because it exerted 100% mortality, while adulticide activity was considered moderate.
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Affiliation(s)
- Katharigatta N Venugopala
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001, South Africa
| | - Susanta K Nayak
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440010, India
| | - Raquel M Gleiser
- CREAN-IMBIV (CONICET-UNC), Universidad Nacional de Córdoba, Av. Valparaíso s.n., Córdoba, 5000, Argentina.,FCEFyN, Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, Córdoba, 5000, Argentina
| | - Mariela E Sanchez-Borzone
- Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET-Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba, 5016, Argentina
| | - Daniel A Garcia
- Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET-Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba, 5016, Argentina
| | - Bharti Odhav
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001, South Africa
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13
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Ye X, Yuan Z, Zhou Y, Yang Q, Xie Y, Deng Z, Peng Y. Nickel-catalyzed Kumada Cross-coupling Reaction for the Synthesis of 2,4-Diarylquinazolines. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2513] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xinglin Ye
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
- Department of Chemistry and Environmental Engineering; Jiujiang University; Jiujiang Jiangxi 332005 P. R. of China
| | - Zhihan Yuan
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
| | - Yirong Zhou
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
| | - Qin Yang
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
| | - Yepeng Xie
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
| | - Zhihong Deng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
| | - Yiyuan Peng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Key Laboratory of Green Chemistry; Jiangxi Normal University; Jiangxi Province Nanchang Jiangxi 330022 China
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14
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Liu Z, Chen H, Chen K, Shao Y, Kiesewetter DO, Niu G, Chen X. Boramino acid as a marker for amino acid transporters. SCIENCE ADVANCES 2015; 1:e1500694. [PMID: 26601275 PMCID: PMC4643766 DOI: 10.1126/sciadv.1500694] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/08/2015] [Indexed: 06/05/2023]
Abstract
Amino acid transporters (AATs) are a series of integral channels for uphill cellular uptake of nutrients and neurotransmitters. Abnormal expression of AATs is often associated with cancer, addiction, and multiple mental diseases. Although methods to evaluate in vivo expression of AATs would be highly useful, efforts to develop them have been hampered by a lack of appropriate tracers. We describe a new class of AA mimics-boramino acids (BAAs)-that can serve as general imaging probes for AATs. The structure of a BAA is identical to that of the corresponding natural AA, except for an exotic replacement of the carboxylate with -BF3 (-). Cellular studies demonstrate strong AAT-mediated cell uptake, and animal studies show high tumor-specific accumulation, suggesting that BAAs hold great promise for the development of new imaging probes and smart AAT-targeting drugs.
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Affiliation(s)
- Zhibo Liu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health (NIH), Bethesda, MD 20892, USA
| | - Haojun Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health (NIH), Bethesda, MD 20892, USA
- Department of nuclear medicine, Xiamen Cancer Center, First Affiliated Hospital of Xiamen University, Xiamen 361003, China
| | - Kai Chen
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Yihan Shao
- Laboratory of Computational Biology, National Heart Lung and Blood Institute, NIH, Bethesda, MD 20892, USA
| | - Dale O. Kiesewetter
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health (NIH), Bethesda, MD 20892, USA
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health (NIH), Bethesda, MD 20892, USA
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health (NIH), Bethesda, MD 20892, USA
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15
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Yan Y, Xu Y, Niu B, Xie H, Liu Y. I2-Catalyzed Aerobic Oxidative C(sp3)–H Amination/C–N Cleavage of Tertiary Amine: Synthesis of Quinazolines and Quinazolinones. J Org Chem 2015; 80:5581-7. [DOI: 10.1021/acs.joc.5b00474] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yizhe Yan
- School
of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, P. R. China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou 450000, P. R. China
| | - Ying Xu
- School
of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, P. R. China
| | - Bin Niu
- School
of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, P. R. China
| | - Huifang Xie
- School
of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, P. R. China
| | - Yanqi Liu
- School
of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, P. R. China
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16
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Bao Y, Yan Y, Xu K, Su J, Zha Z, Wang Z. Copper-catalyzed radical methylation/C-H amination/oxidation cascade for the synthesis of quinazolinones. J Org Chem 2015; 80:4736-42. [PMID: 25849218 DOI: 10.1021/acs.joc.5b00191] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A copper-catalyzed radical methylation/sp(3) C-H amination/oxidation reaction for the facile synthesis of quinazolinone was developed. In this cascade reaction, dicumyl peroxide acts not only as a useful oxidant but also as an efficient methyl source. Notably, a methyl radical, generated from peroxide, was confirmed by electron paramagnetic resonance for the first time.
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17
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Jiang X, Yu GW, Li ZG, Chu SP, Wang SP. Synthesis and Characterisation of Phosphazene Derivatives Containing Dioxybiphenyl and 4-Sulfanylquinazoline Groups. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14242621081153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2,2-Dichloro-4,4,6,6-bis[spiro(2′,2″-dioxy-1′,1″-biphenylyl)]cyclotriphosphazene was synthesised from the reaction of hexachlorocyclotriphosphazene with biphenyl-2,2′-diol. 2,2-Bis(4-formylphenoxy)-4,4,6,6-bis[spiro(2′,2″-dioxy-1′,1″-biphenylyl)]cyclotriphosphazene was obtained from the reaction of 2,2-dichloro-4,4,6,6-bis[spiro(2′,2″-dioxy-1′,1″-biphenylyl)] cyclotriphosphazene with 4-hydroxybenzaldehyde. 2,2-Bis[4-(4-quinazolinone)phenoxy]-4,4,6,6-bis[spiro(2′,2″-dioxy-1′,1″-biphenylyl)]cyclotriphosphazene was synthesised from the reaction of 2,2-bis(4-formylphenoxy)-4,4,6,6-bis[spiro(2′,2″-dioxy-1′,1″-biphenylyl)]cyclotriphosphazene with anthranilamide in N,N-dimethylformamide. The novel cyclophosphazene derivatives were synthesised under mild conditions from the reaction of 2,2-bis[4-(4-quinazolinone)phenoxy]-4,4,6,6-bis[spiro(2′,2″-dioxy-1′,1″-biphenylyl)]cyclotriphosphazene with 4-chlorobenzenemethanethiol, p-thiocresol, 4-aminothiophenol, and 4-chlorothiophenol in the presence of p-toluenesulfonyl chloride via C-OH bond activation under mild conditions. All products were generally obtained in high yields. Their structures were characterised by HRMS, IR and 1H, 13C spectroscopy.
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Affiliation(s)
- Xiang Jiang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Guo-Wei Yu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Zu-Guang Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Shi-Peng Chu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P.R. China
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18
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Yuan D, Kong HH, Ding MW. New efficient synthesis of 1H-pyrimido[2,1-b]quinazoline-2,6-diones via a tandem aza-Wittig/nucleophilic addition/intramolecular cyclization/isomerization reaction starting from the Baylis–Hillman adducts. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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19
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Peng Y, Huang P, Wang Y, Zhou Y, Yuan J, Yang Q, Jiang X, Deng Z, Xu J. Synthesis of 4-alkynylquinazolines: Pd–Cu-cocatalyzed coupling of quinazoline-4-tosylates with terminal alkynes using N-heterocyclic carbenes as ligands. Org Biomol Chem 2014; 12:5922-7. [DOI: 10.1039/c4ob00700j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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20
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Yang Y, Adelstein SJ, Kassis AI. Putative molecular signatures for the imaging of prostate cancer. Expert Rev Mol Diagn 2014; 10:65-74. [DOI: 10.1586/erm.09.73] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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21
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Zhang LJ, Song Y, Luo XN, Li H. 6',7'-Dimeth-oxy-1',2'-dihydro-spiro-[cyclo-hexane-1,2'-quinazolin]-4'(3'H)-one. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o3389. [PMID: 22199878 PMCID: PMC3239030 DOI: 10.1107/s1600536811048732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Accepted: 11/16/2011] [Indexed: 11/10/2022]
Abstract
In the title compound, C(15)H(20)N(2)O(3), prepared from the reaction of 2-amino-4,5-dimeth-oxy-benzonitrile and cyclo-hexa-none, the six-membered diaza ring assumes an envelope conformation. In the crystal, inversion dimers are formed by pairs of N-H⋯O hydrogen bonds. Futher N-H⋯O hydrogen bonds link the dimers into a two-dimensional structure parallel to (001).
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Affiliation(s)
- Li-Jun Zhang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
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22
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Yang Y, Wang K, Li W, Adelstein SJ, Kassis AI. Human placental alkaline phosphatase-mediated hydrolysis correlates tightly with the electrostatic contribution from tail group. Chem Biol Drug Des 2011; 78:923-31. [PMID: 21910833 DOI: 10.1111/j.1747-0285.2011.01238.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Human placental alkaline phosphatase has been identified as a hydrolase that is significantly overexpressed on the surface of various solid tumor cells, and is therefore a suitable prodrug design target for non-invasive cancer imaging and therapy. Structure-based prediction of enzymatic activities is essential for rational prodrug design. We have been probing the catalytic proficiency--(k(cat) /K(M) )/k(w)--of placental alkaline phosphatase toward several widely diverse substrate structures experimentally and correlating these results to in silico predictions that are based on the free energy estimates obtained from docking of each substrate structure with placental alkaline phosphatase. We have found that electrostatic contribution from the tail group is the most crucial factor to determine the catalytic efficiencies of the substrates. The electrostatic contribution and the total binding energy of the tail group are well correlated with catalytic efficiencies (R² = 0.79 and 0.89, respectively). However, hydrophobic contribution from the tail group does not correlate with the catalytic efficiencies (negative correlation, R² = 0.27). This supports the prior hypothesis stating that alkaline phosphatase-mediated differential hydrolysis of its substrates is attributable to the differential interactions with the tail group, determined by the electrostatic contributions from the non-bridging oxygen atoms. Calculation of the electrostatic potentials within the active site of human placental alkaline phosphatase also suggests that the local positive electrostatic environment may account for its capability to distinguish various substrates. Our study is likely to have immediate implications in the design of prodrugs against human placental alkaline phosphatase and other esterases overexpressed by human tumor cells.
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Affiliation(s)
- Yongliang Yang
- Department of Radiology, Harvard Medical School, Harvard University, 200 Longwood Avenue, Boston, MA 02115, USA
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23
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Froufe HJC, Abreu RMV, Ferreira ICFR. Using molecular docking to investigate the anti-breast cancer activity of low molecular weight compounds present on wild mushrooms. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2011; 22:315-328. [PMID: 21598196 DOI: 10.1080/1062936x.2011.569897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Mushrooms represent an unlimited source of compounds with anti-tumour and immunostimulating properties, and their intake has been shown to reduce the risk of breast cancer. A large number of low molecular weight (LMW) compounds present in mushrooms have been identified, including phenolic acids, flavonoids, tocopherols, carotenoids, sugars and fatty acids. In order to evaluate which wild mushroom LMW compounds may be involved in anti-breast cancer activity we selected a representative dataset of 43 LMW compounds and performed molecular docking against three known protein targets involved in breast cancer (aromatase, estrone sulfatase and 17β-HSD-1) using AutoDock4 as docking software. The estimated inhibition constants for all LMW compounds were determined, and the potential structure-activity relationships for the compounds with the best estimated inhibition constants are discussed for each compound family. 4-O-caffeoylquinic, naringin and lycopene stand out as the top-ranked potential inhibitors for aromatase, estrone sulfatase and 17β-HSD1, respectively, and the 3-D docked conformations for these compounds are discussed in detail. This information provides several interesting starting points for further development of aromatase, estrone sulfatase and 17β-HSD1 inhibitors.
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Affiliation(s)
- H J C Froufe
- CIMO/Escola Superior Agraria, Instituto Politecnico de Braganca, Campus de Santa Apolonia, Braganca, Portugal
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24
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Yang Y, Adelstein SJ, Kassis AI. Integrated bioinformatics analysis for cancer target identification. Methods Mol Biol 2011; 719:527-45. [PMID: 21370101 DOI: 10.1007/978-1-61779-027-0_25] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The exponential growth of high-throughput Omics data has provided an unprecedented opportunity for new target identification to fuel the dried-up drug discovery pipeline. However, the bioinformatics analysis of large amount and heterogeneous Omics data has posed a great deal of technical challenges for experimentalists who lack statistical skills. Moreover, due to the complexity of human diseases, it is essential to analyze the Omics data in the context of molecular networks to detect meaningful biological targets and understand disease processes. Here, we describe an integrated bioinformatics analysis strategy and provide a running example to identify suitable targets for our in-house Enzyme-Mediated Cancer Imaging and Therapy (EMCIT) technology. In addition, we go through a few key concepts in the process, including corrected false discovery rate (FDR), Gene Ontology (GO), pathway analysis, and tissue specificity. We also describe popular programs and databases which allow the convenient annotation and network analysis of Omics data. We provide a practical guideline for researchers to quickly follow the protocol described and identify those targets that are pertinent to their work.
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Affiliation(s)
- Yongliang Yang
- Department of Radiology, Harvard Medical School, Harvard University, Boston, MA, USA
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25
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Abreu RM, Froufe HJ, Queiroz MJR, Ferreira IC. MOLA: a bootable, self-configuring system for virtual screening using AutoDock4/Vina on computer clusters. J Cheminform 2010; 2:10. [PMID: 21029419 PMCID: PMC2987878 DOI: 10.1186/1758-2946-2-10] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Accepted: 10/28/2010] [Indexed: 11/10/2022] Open
Abstract
Background Virtual screening of small molecules using molecular docking has become an important tool in drug discovery. However, large scale virtual screening is time demanding and usually requires dedicated computer clusters. There are a number of software tools that perform virtual screening using AutoDock4 but they require access to dedicated Linux computer clusters. Also no software is available for performing virtual screening with Vina using computer clusters. In this paper we present MOLA, an easy-to-use graphical user interface tool that automates parallel virtual screening using AutoDock4 and/or Vina in bootable non-dedicated computer clusters. Implementation MOLA automates several tasks including: ligand preparation, parallel AutoDock4/Vina jobs distribution and result analysis. When the virtual screening project finishes, an open-office spreadsheet file opens with the ligands ranked by binding energy and distance to the active site. All results files can automatically be recorded on an USB-flash drive or on the hard-disk drive using VirtualBox. MOLA works inside a customized Live CD GNU/Linux operating system, developed by us, that bypass the original operating system installed on the computers used in the cluster. This operating system boots from a CD on the master node and then clusters other computers as slave nodes via ethernet connections. Conclusion MOLA is an ideal virtual screening tool for non-experienced users, with a limited number of multi-platform heterogeneous computers available and no access to dedicated Linux computer clusters. When a virtual screening project finishes, the computers can just be restarted to their original operating system. The originality of MOLA lies on the fact that, any platform-independent computer available can he added to the cluster, without ever using the computer hard-disk drive and without interfering with the installed operating system. With a cluster of 10 processors, and a potential maximum speed-up of 10x, the parallel algorithm of MOLA performed with a speed-up of 8,64× using AutoDock4 and 8,60× using Vina.
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Affiliation(s)
- Rui Mv Abreu
- CIMO-ESA, Instituto Politécnico de Bragança, Campus de Sta Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
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26
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Begley DW, Zheng S, Varani G. Fragment-based discovery of novel thymidylate synthase leads by NMR screening and group epitope mapping. Chem Biol Drug Des 2010; 76:218-33. [PMID: 20626411 DOI: 10.1111/j.1747-0285.2010.01010.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Solution-state nuclear magnetic resonance (NMR) is a versatile tool for the study of binding interactions between small molecules and macromolecular targets. We applied ligand-based NMR techniques to the study of human thymidylate synthase (hTS) using known nanomolar inhibitors and a library of small molecule fragments. Screening by NMR led to the rapid identification of ligand pairs that bind in proximal sites within the cofactor-binding pocket of hTS. Screening hits were used as search criteria within commercially available sources, and a subset of catalog analogs were tested for potency by in vitro assay and binding affinity by quantitative saturation transfer difference (STD)-NMR titration. Two compounds identified by this approach possess low micromolar affinity and potency, as well as excellent binding efficiency against hTS. Relative binding orientations for both leads were modeled using AutoDock, and the most likely bound conformations were validated using experimentally derived STD-NMR binding epitope data. These ligands represent novel starting points for fragment-based drug design of non-canonical TS inhibitors, and their binding epitopes highlight important and previously unexploited interactions with conserved residues in the cofactor-binding site.
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Affiliation(s)
- Darren W Begley
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA.
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27
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Hioki H, Matsushita K, Nakamura S, Horiuchi H, Kubo M, Harada K, Fukuyama Y. Solid-Phase Combinatorial Synthesis of 2-Arylquinazolines and 2-Arylquinazolinones by an 4-Alkoxyaniline Linker. ACTA ACUST UNITED AC 2008; 10:620-3. [DOI: 10.1021/cc800056c] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hideaki Hioki
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
| | - Kimihito Matsushita
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
| | - Shosei Nakamura
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
| | - Hiroki Horiuchi
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
| | - Miwa Kubo
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
| | - Kenichi Harada
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
| | - Yoshiyasu Fukuyama
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514 Japan
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28
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Kassis AI, Korideck H, Wang K, Pospisil P, Adelstein SJ. Novel prodrugs for targeting diagnostic and therapeutic radionuclides to solid tumors. Molecules 2008; 13:391-404. [PMID: 18305426 PMCID: PMC6244955 DOI: 10.3390/molecules13020391] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 02/15/2008] [Accepted: 02/15/2008] [Indexed: 11/19/2022] Open
Abstract
Most cancer therapeutics (chemo, radiation, antibody-based, anti-angiogenic) are at best partially and/or temporarily effective. In general, the causes for failure can be summarized as: (i) poor diffusion and/or nonuniform distribution of drug/prodrug molecules in solid tumors; (ii) high drug concentration and retention in normal tissues (leading to side effects); (iii) requirement for plasma-membrane permeability and/or internalization of drug/prodrug molecules; (iv) low uptake of drug by tumor; (v) lack of retention of drug within tumor (most have gradient-driven reversible binding); and (vi) multidrug resistance. We are developing an innovative technology that aims to surmount these problems by actively concentrating and permanently entrapping radioimaging and radiotherapeutic prodrugs specifically within solid tumors. The approach will enable noninvasive sensing (imaging) and effective therapy of solid tumors, allowing tumor detection, diagnosis, and treatment to be closely coupled (personalized medicine).
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Affiliation(s)
- Amin I Kassis
- Department of Radiology, Harvard Medical School, Armenise Building, Room D2-137, 200 Longwood Avenue, Boston, Massachusetts 02115, USA.
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29
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Zhang L, Li J, Shi D, Zhang L, Fan Y. (S)-2-(3-Nitro-phen-yl)-1,2-dihydro-quinazolin-4(3H)-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o448. [PMID: 21201475 PMCID: PMC2960258 DOI: 10.1107/s1600536807066251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2007] [Accepted: 12/09/2007] [Indexed: 11/22/2022]
Abstract
In the racemic title compound, C14H11N3O3, the pyrimidine ring has an envelope conformation with the puckering parameters Q = 0.3338 (17) Å, Θ = 60.1 (3) and ϕ = 290.4 (3)°. The two N—H groups form hydrogen bonds with symmetry-related molecules, building a two-dimensional network parallel to the (10) plane.
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Affiliation(s)
- Lijun Zhang
- School of Chemical Engineering & the Environment, Beijing Institute of Technology, Beijing 100081, People's Republic of China
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30
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Wang K, Adelstein SJ, Kassis AI. DMSO increases radioiodination yield of radiopharmaceuticals. Appl Radiat Isot 2008; 66:50-9. [PMID: 17931872 PMCID: PMC2139899 DOI: 10.1016/j.apradiso.2007.07.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 06/28/2007] [Accepted: 07/31/2007] [Indexed: 11/19/2022]
Abstract
A high-yield radioiodination method for various types of molecules is described. The approach employs DMSO as precursor solvent, a reaction ratio of 2-5 precursor molecules per iodine atom, 5-10 microg oxidant, and a 10-25 microl reaction volume. The solution is vortexed at room temperature for 1-5 min and progress of the reaction is assessed by HPLC. Radioiodinated products are obtained in > or = 95% yield and meet the requirements for radiotracer imaging, biodistribution studies, and molecular and cellular biology research.
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Affiliation(s)
- Ketai Wang
- Department of Radiology, Armenise Building Room D2-137, 200 Longwood Avenue, Harvard Medical School, Boston, MA 02115
| | - S. James Adelstein
- Department of Radiology, Armenise Building Room D2-137, 200 Longwood Avenue, Harvard Medical School, Boston, MA 02115
| | - Amin I. Kassis
- Department of Radiology, Armenise Building Room D2-137, 200 Longwood Avenue, Harvard Medical School, Boston, MA 02115
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31
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Pospisil P, Wang K, Al Aowad AF, Iyer LK, Adelstein SJ, Kassis AI. Computational Modeling and Experimental Evaluation of a Novel Prodrug for Targeting the Extracellular Space of Prostate Tumors. Cancer Res 2007; 67:2197-205. [PMID: 17332350 DOI: 10.1158/0008-5472.can-06-3309] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We are developing a noninvasive approach for targeting imaging and therapeutic radionuclides to prostate cancer. Our method, Enzyme-Mediated Cancer Imaging and Therapy (EMCIT), aims to use enzyme-dependent, site-specific, in vivo precipitation of a radioactive molecule within the extracellular space of solid tumors. Advanced methods for data mining of the literature, protein databases, and knowledge bases (IT. Omics LSGraph and Ingenuity Systems) identified prostatic acid phosphatase (PAP) as an enzyme overexpressed in prostate cancer and secreted in the extracellular space. Using AutoDock 3.0 software, the prodrug ammonium 2-(2'-phosphoryloxyphenyl)-6-iodo-4-(3H)-quinazolinone (IQ(2-P)) was docked in silico into the X-ray structure of PAP. The data indicate that IQ(2-P) docked into the PAP active site with a calculated inhibition constant (K(i)) more favorable than that of the PAP inhibitor alpha-benzylaminobenzylphosphonic acid. When (125)IQ(2-P), the radioiodinated form of the water-soluble prodrug, was incubated with PAP, rapid hydrolysis of the compound was observed as exemplified by formation of the water-insoluble 2-(2'-hydroxyphenyl)-6-[(125)I]iodo-4-(3H)-quinazolinone ((125)IQ(2-OH)). Similarly, the incubation of IQ(2-P) with human LNCaP, PC-3, and 22Rv1 prostate tumor cells resulted in the formation of large fluorescent IQ(2-OH) crystals. No hydrolysis was seen in the presence of normal human cells. Autoradiography of tumor cells incubated with (125)IQ(2-P) showed accumulation of radioactive grains ((125)IQ(2-OH)) around the cells. We anticipate that the EMCIT approach will enable the active in vivo entrapment of radioimaging and radiotherapeutic compounds within the extracellular spaces of primary prostate tumors and their metastases.
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Affiliation(s)
- Pavel Pospisil
- Department of Radiology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
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