1192-79-6Relevant articles and documents
A new pyrrole alkaloid from seeds of Castanea sativa
Hiermann, Alois,Kedwani, Samir,Schramm, Hans Wolfgang,Seger, Christoph
, p. 22 - 27 (2002)
A new pyrrole alkaloid, methyl-(5-formyl-1H-pyrrole-2-yl)-4-hydroxybutyrate (1), was isolated from sweet chestnut seeds and its structure elucidated on the basis of data from NMR spectroscopy and by comparison with synthetic analogues.
Chemical synthesis of a 'GSA-pyrrole' and its reaction with Ehrlich's reagent
Liddell,Forsyth,Senge,Smith
, p. 1343 - 1350 (1993)
A rational chemical synthesis of 4-acetyl-2-(2-carboxyethyl)-5-methylpyrrole (5), the product formed when glutamate-1-semialdehyde (GSA, 2) is reacted with acetylacetone in the first step of the quantitative analysis for GSA in biological media. Rates of reaction of the GSA-pyrrole (5) with Ehrlich's reagent (the second step in GSA quantitation) are compared with the rates of the reactions of well-characterized 'ALA-pyrroles' (3) and (4). Pyrrole (5) reacts more slowly with Ehrlich's reagent, and extinction coefficients for the corresponding Ehrlich's adducts were determined to be 46,000 for (3) and 865 for (5). These observations resolve the discrepancies observed in earlier quantitations of GSA and allow more accurate determinations of it in biological materials.
Metabolites of the Marine Sponge Laxosuberites sp.
Stierle, Donald B.,Faulkner, John D.
, p. 4980 - 4982 (1980)
The marine sponge Laxosuberites sp. contained a mixture of four 5-alkylpyrrole-2-carboxaldehydes 1, (6'Z)-5-(12'-cyano-6'-dodecenyl)pyrrole-2-carboxaldehyde (2), and (6'Z)-5-(23'-cyano-23'-hydroxy-6'-tricosenyl)pyrrole-2-carboxaldehyde (3).The structures of the metabolites were determined by interpretation of spectral data and by chemical degradation.The cyanohydrin 3 is unusually stable to normal isolation and storage procedures.
Discovery of 1-(5-(1H-benzo[d]imidazole-2-yl)-2,4-dimethyl-1H-pyrrol-3-yl)ethan-1-one derivatives as novel and potent bromodomain and extra-terminal (BET) inhibitors with anticancer efficacy
Bian, Yuanyuan,Chen, Yadong,Hong, Qianqian,Jiang, Fei,Kong, Bo,Li, Hongmei,Lu, Tao,Ma, Yu,Ran, Ting,Tang, Weifang,Wang, Cong,Yang, Na,Zhang, Zhimin,Zheng, Wan,Zhu, Jiapeng,Zhu, Zhaohong
, (2021/11/03)
As epigenetic readers, bromodomain and extra-terminal domain (BET) family proteins bind to acetylated-lysine residues in histones and recruit protein complexes to promote transcription initiation and elongation. Inhibition of BET bromodomains by small molecule inhibitors has emerged as a promising therapeutic strategy for cancer. Herein, we describe our efforts toward the discovery of a novel series of 1-(5-(1H-benzo[d]imidazole-2-yl)-2,4-dimethyl-1H-pyrrol-3-yl)ethan-1-one derivatives as BET inhibitors. Intensive structural modifications led to the identification of compound 35f as the most active inhibitor of BET BRD4 with selectivity against BET family proteins. Further biological studies revealed that compound 35f can arrest the cell cycle in G0/G1 phase and induce apoptosis via decreasing the expression of c-Myc and other proteins related to cell cycle and apoptosis. More importantly, compound 35f showed favorable pharmacokinetic properties and antitumor efficacy in MV4-11 mouse xenograft model with acceptable tolerability. These results indicated that BET inhibitors could be potentially used to treat hematologic malignancies and some solid tumors.
Neutrophil-Selective Fluorescent Probe Development through Metabolism-Oriented Live-Cell Distinction
Gao, Min,Lee, Sun Hyeok,Park, Sang Hyuk,Ciaramicoli, Larissa Miasiro,Kwon, Haw-Young,Cho, Heewon,Jeong, Joseph,Chang, Young-Tae
supporting information, p. 23743 - 23749 (2021/10/14)
Human neutrophils are the most abundant leukocytes and have been considered as the first line of defence in the innate immune system. Selective imaging of live neutrophils will facilitate the in situ study of neutrophils in infection or inflammation events as well as clinical diagnosis. However, small-molecule-based probes for the discrimination of live neutrophils among different granulocytes in human blood have yet to be reported. Herein, we report the first fluorescent probe NeutropG for the specific distinction and imaging of active neutrophils. The selective staining mechanism of NeutropG is elucidated as metabolism-oriented live-cell distinction (MOLD) through lipid droplet biogenesis with the help of ACSL and DGAT. Finally, NeutropG is applied to accurately quantify neutrophil levels in fresh blood samples by showing a high correlation with the current clinical method.
PYRROLOTRIAZINONES AND IMIDAZOTRIAZINONES AS UBIQUITIN-SPECIFIC PROTEASE 7 INHIBITORS
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Paragraph 0606, (2016/07/27)
The invention relates to inhibitors of USP7 inhibitors useful in the treatment of cancers, neurodegenerative diseases, immunological disorders, inflammatory disorders, cardiovascular diseases, ischemic diseases, viral infections and diseases, and bacterial infections and diseases, having the Formula: where R1, R2, R3, R4, R5, R5′, R6, X1, X2, m, and n are described herein.
One-pot synthesis of highly substituted n -fused heteroaromatic bicycles from azole aldehydes
Outlaw, Victor K.,Dandrea, Felipe B.,Townsend, Craig A.
supporting information, p. 1822 - 1825 (2015/04/27)
An efficient route to substituted N-fused aromatic heterocycles, including indolizines, imidazo[1,2-a]pyridines, and imidazo[1,5-a]pyridines from azole aldehydes, is reported. Wittig olefination of the aldehydes with fumaronitrile and triethylphosphine affords predominantly E-alkenes that undergo rapid cyclization upon treatment with a mild base. Substituent control of the 1-, 2-, and 3-positions of the resulting heteroaromatic bicycles is shown. Alternatively, the isolable E-alkene undergoes selective alkylation with electrophiles, followed by in situ annulation to indolizines additionally substituted at the 6-position.
Photoinduced cytotoxicity and thioadduct formation by a prodigiosin analogue
Tomlinson, John T.,Park, Gyungse,Misenheimer, Jacob A.,Kucera, Gregory L.,Hesp, Kevin,Manderville, Richard A.
, p. 4951 - 4954 (2007/10/03)
(Chemical Equation Presented) The prodigiosin alkaloid 1 and the synthetic analogue 2 show photoinduced cytotoxicity against HL-60 cancer cells. Photoirradiation of 1 and 2 causes photofading, photooxidation, and thioadduct formation. These results provide a model for the redox properties of prodigiosins that play a role in their biological activity and provide a new way to functionalize their pyrromethene entity with water-soluble thiol groups.
Pyrrolotriazine inhibitors of kinases
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Page/Page column 26, (2008/06/13)
The present invention provides compounds of formula I and pharmaceutically acceptable salts thereof. The formula I compounds inhibit the tyrosine kinase activity of growth factor receptors such as VEGFR-2, FGFR-1, PDGFR, HER-1, HER-2, thereby making them useful as anti-cancer agents. The formula I compounds are also useful for the treatment of other diseases associated with signal transduction pathways operating through growth factor receptors.
Discovery of the pyrrolo[2,1-f][1,2,4]triazine nucleus as a new kinase inhibitor template
Hunt, John T.,Mitt, Toomas,Borzilleri, Robert,Gullo-Brown, Johnni,Fargnoli, Joseph,Fink, Brian,Han, Wen-Ching,Mortillo, Steven,Vite, Gregory,Wautlet, Barri,Wong, Tai,Yu, Chiang,Zheng, Xiaoping,Bhide, Rajeev
, p. 4054 - 4059 (2007/10/03)
The pyrrolo[2,1-f][1,2,4]triazine nucleus was identified as a novel kinase inhibitor template which effectively mimics the well-known quinazoline kinase inhibitor scaffold. Attachment of a 4-((3-chloro-4-fluorophenyl)amino) substituent to the template provided potent biochemical inhibitors of the tyrosine kinase activity of EGFR, as well as inhibition of cellular proliferation of the human colon tumor cell line DiFi. Attachment of a 4-((3-hydroxy-4-methylphenyl)amino) substituent provided potent inhibitors of VEGFR-2 which also showed effects on the VEGF-dependent proliferation of human umbilical vein endothelial cells. Biological activity was maintained with substitution at positions 5 or 6, but not 7, suggesting that the former positions are promising sites for introducing side chains which modulate physicochemical. properties. Preliminary inhibition studies with varying ATP concentrations suggest that, like the quinazoline-based kinase inhibitors, the pyrrolotriazine-based inhibitors bind in the ATP pocket.
