- Novel and highly efficient synthesis of 3-(alkyl/benzylthio)-9b-hydroxy-1H-imidazo[5,1-a]isoindole-1,5(9bH)-dione derivatives
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The oxidation of 3a,8a-dihydroxy-2-(alkyl/benzylthio)indeno[1,2-d]imidazol-8(3H)-ones to give the corresponding 3-(alkyl/benzylthio)-9b-hydroxy-1H-imidazo[5,1-a]isoindole-1,5(9bH)-dione derivatives in good to excellent yields at room temperature using two oxidants, periodic acid in aqueous ethanol and lead(IV) acetate in acetic acid, has been reported.
- Jamaleddini, Azar,Mohammadizadeh, Mohammad Reza
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supporting information
p. 78 - 81
(2016/12/23)
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- Degradation of MAC13243 and studies of the interaction of resulting thiourea compounds with the lipoprotein targeting chaperone LolA
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The discovery of novel small molecules that function as antibacterial agents or cellular probes of biology is hindered by our limited understanding of bacterial physiology and our ability to assign mechanism of action. We previously employed a chemical genomic strategy to identify a novel small molecule, MAC13243, as a likely inhibitor of the bacterial lipoprotein targeting chaperone, LolA. Here, we report on the degradation of MAC13243 into the active species, S-(4-chlorobenzyl)isothiourea. Analogs of this compound (e.g., A22) have previously been characterized as inhibitors of the bacterial actin-like protein, MreB. Herein, we demonstrate that the antibacterial activity of MAC13243 and the thiourea compounds are similar; these activities are suppressed or sensitized in response to increases or decreases of LolA copy number, respectively. We provide STD NMR data which confirms a physical interaction between LolA and the thiourea degradation product of MAC13243, with a K d of ~150 μM. Taken together, we conclude that the thiourea series of compounds share a similar cellular mechanism that includes interaction with LolA in addition to the well-characterized target MreB.
- Barker, Courtney A.,Allison, Sarah E.,Zlitni, Soumaya,Nguyen, Nick Duc,Das, Rahul,Melacini, Giuseppe,Capretta, Alfredo A.,Brown, Eric D.
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supporting information
p. 2426 - 2431
(2013/05/21)
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- Synthesis and antimicrobial and nitric oxide synthase inhibitory activities of novel isothiourea derivatives
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The reaction of substituted benzylhalides, or of halomethyl derivatives of thiophene or furane, with thiourea or its derivatives yielded the respective isothioureas as hydrohalide salts. The products (a total of 17, including 16 novel compounds) were test
- Kazimierczuk, Zygmunt,Chalimoniuk, Malgorzata,Laudy, Agnieszka Ewa,Moo-Puc, Rosa,Cedillo-Rivera, Roberto,Starosciak, Bohdan Jerzy,Chrapusta, Stanislaw J.
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experimental part
p. 821 - 830
(2012/01/05)
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- INHIBITION OF CELL PROLIFERATION
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Compounds of formula (I) and (II) are provided as modulators of Rb:Raf-1 interactions which are potent, selective disruptors of Rb:Raf-1 binding. Therapeutic methods of using the compounds, for example for treating or ameliorating a cell proliferation disorder such as cancer, are provided.
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Page/Page column 67
(2010/04/06)
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- INHIBITION OF CELL PROLIFERATION
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The disclosed modulators of Rb:Raf-1 interactions are potent, selective disruptors of Rb:Raf-1 binding, with IC50 values ranging from 80 nM to 500 nM. Further, these compounds are surprisingly effective in inhibiting a wide variety of cancer cells, including osteosarcoma, epithelial lung carcinoma, non small cell lung carcinoma, three different pancreatic cancer cell lines, two different glioblastoma cell lines, metastatic breast cancer, melanoma, and prostate cancer. Moreover, the disclosed compounds effectively disrupt angiogenesis and significantly inhibited tumors in nude mice derived from human epithelial lung carcinoma tumors. Accordingly, the disclosed compounds, pharmaceutical compositions comprising the compounds, methods of inhibiting cell proliferation, methods of treating subjects with cancer, and methods of preparing the disclosed compounds are provided.
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Page/Page column 47; 49; 70
(2008/06/13)
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