21905-78-2Relevant academic research and scientific papers
Synthesis of 4-azachromeno[2,3-b]indol-11(6H)-one and its derivatives as analogues of ellipticine
Chen, Yanhong,Yang, Chunhao,Xie, Yuyuan
, p. 251 - 258 (2010)
4-Azachromeno[2,3-b]indol-11(6H)-ones (4) and their derivatives (5) as analogues of ellipticine were synthesized through a straightforward, two or three-step process. Tetracyclic heterocycles (4) were obtained by facile cyclization of indolin-2-ones (2) or (3) and 2-chloronicotinoyl chloride under the condition of the 'Jensen'-reaction. Alkylation of the compounds (4) afforded 6-substituted 4-azachromeno[2,3-b]indol-ll(6H)-ones.
Discovery of a potent inhibitor of MELK that inhibits expression of the anti-apoptotic protein Mcl-1 and TNBC cell growth
Edupuganti, Ramakrishna,Taliaferro, Juliana M.,Wang, Qiantao,Xie, Xuemei,Cho, Eun Jeong,Vidhu, Fnu,Ren, Pengyu,Anslyn, Eric V.,Bartholomeusz, Chandra,Dalby, Kevin N.
, p. 2609 - 2616 (2017/04/06)
Despite recent advances in molecularly directed therapy, triple negative breast cancer (TNBC) remains one of the most aggressive forms of breast cancer, still without a suitable target for specific inhibitors. Maternal embryonic leucine zipper kinase (MELK) is highly expressed in TNBC, where level of overexpression correlates with poor prognosis and an aggressive disease course. Herein, we describe the discovery through targeted kinase inhibitor library screening, and structure-guided design of a series of ATP-competitive indolinone derivatives with subnanomolar inhibition constants towards MELK. The most potent compound, 17, inhibits the expression of the anti-apoptotic protein Mcl-1 and proliferation of TNBC cells exhibiting selectivity for cells expressing high levels of MELK. These studies suggest that further elaboration of 17 will furnish MELK-selective inhibitors with potential for development in preclinical models of TNBC and other cancers.
Synthesis of oxindole from acetanilide via Ir(iii)-catalyzed C-H carbenoid functionalization
Patel, Pitambar,Borah, Gongutri
, p. 443 - 446 (2017/01/03)
Herein we disclose the first report on the synthesis of oxindole derivatives from acetanilide via Ir(iii)-catalyzed intermolecular C-H functionalization with diazotized Meldrum's acid. A broad range of substituted anilides were found to react smoothly under the Ir(iii)-catalytic system to afford the corresponding N-protected oxindoles. The N-protecting groups, such as Ac, Bz or Piv, can be easily removed to furnish the oxindole. Various synthetic applications of the synthesized oxindole were also demonstrated.
COMPOUND; TAUTOMER AND GEOMETRIC ISOMER THEREOF; SALT OF SAID COMPOUND, TAUTOMER, OR GEOMETRIC ISOMER; METHOD FOR MANUFACTURING SAID COMPOUND, TAUTOMER, ISOMER, OR SALT; ANTIMICROBIAL AGENT; AND ANTI-INFECTIVE DRUG
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Paragraph 0167-0168; 0169, (2015/09/23)
A compound represented by any one of General Formulas (1) to (5), a tautomer or geometric isomer thereof, or a salt thereof.
General synthesis of mono-, di-, and tri-acetylated indoles from indolin-2-ones
Jha, Mukund,Chou, Ting-Yi,Blunt, Brian
experimental part, p. 982 - 989 (2011/03/19)
Having developed the one-pot triacetylation of indolin-3-ones, we have now devised a simple two-step reaction sequences to produce di- and mono-acetylated indoles from indolin-2-ones. The indolin-2-ones were first subjected to acetylation in the presence of acetic anhydride and a catalytic amount of N,N-dimethylaminopyridine to give 2-acetoxy-1,3-diacetylindoles. Subsequently, an enzyme-assisted deacetylation resulted in the chemoselective deprotection of the acetoxy group to produce 1,3-diacetyl-2-hydroxyindoles. However, a chemical deacetylation of 2-acetoxy-1,3-diacetylinoles under mild basic or acidic conditions resulted in the formation of 3-acetyl-2-hydroxyindoles.
Inhibitors of the salicylate synthase (Mbti) from Mycobacterium tuberculosis discovered by high-throughput screening
Vasan, Mahalakshmi,Neres, Joao,Williams, Jessica,Wilson, Daniel J.,Teitelbaum, Aaron M.,Remmel, Rory P.,Aldrich, Courtney C.
experimental part, p. 2079 - 2087 (2011/11/29)
A simple steady-state kinetic high-throughput assay was developed for the salicylate synthase MbtI from Mycobacterium tuberculosis, which catalyzes the first committed step of mycobactin biosynthesis. The mycobactins are small-molecule iron chelators produced by M. tuberculosis, and their biosynthesis has been identified as a promising target for the development of new antitubercular agents. The assay was miniaturized to a 384-well plate format and high-throughput screening was performed at the National Screening Laboratory for the Regional Centers of Excellence in Biodefense and Emerging Infectious Diseases (NSRB). Three classes of compounds were identified comprising the benzisothiazolones (class I), diarylsulfones (class II), and benzimidazole-2-thiones (class III). Each of these compound series was further pursued to investigate their biochemical mechanism and structure-activity relationships. Benzimidazole-2-thione 4 emerged as the most promising inhibitor owing to its potent reversible inhibition.
NOVEL HYDROXYINDOLE DERIVATIVE
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Page/Page column 18, (2009/12/24)
A compound or a pharmaceutically acceptable salt thereof of the present invention is represented by the following general formula (I): [wherein, R1 to R8 may have a hydrogen atom, a halogen atom, a hydroxy group, a C1-C6 alkyl group,
Design, synthesis, and evaluation of indolinones as triple angiokinase inhibitors and the discovery of a highly specific 6-methoxycarbonyl-substituted indolinone (BIBF 1120)
Roth, Gerald J.,Heckel, Armin,Colbatzky, Florian,Handschuh, Sandra,Kley, J?rg,Lehmann-Lintz, Thorsten,Lotz, Ralf,Tontsch-Grunt, Ulrike,Walter, Rainer,Hilberg, Frank
experimental part, p. 4466 - 4480 (2010/03/02)
Inhibition of tumor angiogenesis through blockade of the vascular endothelial growth factor (VEGF) signaling pathway is a newtreatment modality in oncology. Preclinical findings suggest that blockade of additional pro-angiogenic kinases, such as fibroblast and platelet-derived growth factor receptors (FGFR and PDGFR), may improve the efficacy of pharmacological cancer treatment. Indolinones substituted in position 6 were identified as selective inhibitors of VEGF-, PDGF-, and FGF-receptor kinases. In particular, 6-methoxycarbonyl-substituted indolinones showed a highly favorable selectivity profile. Optimization identified potent inhibitors of VEGF-related endothelial cell proliferation with additional efficacy on pericyctes and smooth muscle cells. In contrast, no direct inhibition of tumor cell proliferation was observed. Compounds 2 (BIBF 1000) and 3 (BIBF 1120) are orally available and display encouraging efficacy in in vivo tumor models while being well tolerated. The triple angiokinase inhibitor 3 is currently in phase III clinical trials for the treatment of nonsmall cell lung cancer.
N-linked heterocyclic antagonists of P2Y1 receptor useful in the treatment of thrombotic conditions
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Page/Page column 71, (2010/11/25)
The present invention provides novel ureas containing N-aryl or N-heteroaryl substituted heterocycles of Formula (I): or a stereoisomer, tautomer, pharmaceutically acceptable salt or solvate form thereof, wherein the variables A, B, D and W are as defined herein. These compounds are selective inhibitors of the human P2Y1 receptor which can be used as medicaments.
Urea antagonists of P2Y1 receptor useful in the treatment of thrombotic conditions
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Page/Page column 52, (2008/06/13)
The present invention provides novel ureas containing N-aryl or N-heteroaryl substituted heterocycles and analogues thereof, which are selective inhibitors of the human P2Y1 receptor. The invention also provides for various pharmaceutical compositions of the same and methods for treating diseases responsive to modulation of P2Y1 receptor activity.
