54474-51-0Relevant articles and documents
Ligand-Directed Approach to Activity-Based Sensing: Developing Palladacycle Fluorescent Probes That Enable Endogenous Carbon Monoxide Detection
Brewer, Thomas F.,Bruemmer, Kevin J.,Chang, Christopher J.,H?fler, Denis,Jurss, Jonah W.,Michel, Brian W.,Morstein, Johannes,Rezgui, Samir P.,Saitoe, Minoru,Ueno, Kohei,Walvoord, Ryan R.
, p. 15917 - 15930 (2020/10/02)
Carbon monoxide (CO) is an emerging gasotransmitter and reactive carbon species with broad anti-inflammatory, cytoprotective, and neurotransmitter functions along with therapeutic potential for the treatment of cardiovascular diseases. The study of CO chemistry in biology and medicine relative to other prominent gasotransmitters such as NO and H2S remains challenging, in large part due to limitations in available tools for the direct visualization of this transient and freely diffusing small molecule in complex living systems. Here we report a ligand-directed activity-based sensing (ABS) approach to CO detection through palladium-mediated carbonylation chemistry. Specifically, the design and synthesis of a series of ABS probes with systematic alterations in the palladium-ligand environment (e.g., sp3-S, sp3-N, sp2-N) establish structure-activity relationships for palladacycles to confer selective reactivity with CO under physiological conditions. These fundamental studies led to the development of an optimized probe, termed Carbon Monoxide Probe-3 Ester Pyridine (COP-3E-Py), which enables imaging of CO release in live cell and brain settings, including monitoring of endogenous CO production that triggers presynaptic dopamine release in fly brains. This work provides a unique tool for studying CO in living systems and establishes the utility of a synthetic methods approach to activity-based sensing using principles of organometallic chemistry.
Investigations regarding the utility of prodigiosenes to treat leukemia
Smithen, Deborah A.,Forrester, A. Michael,Corkery, Dale P.,Dellaire, Graham,Colpitts, Julie,McFarland, Sherri A.,Berman, Jason N.,Thompson, Alison
, p. 62 - 68 (2013/02/23)
Prodigiosenes, possessing a 4-methoxypyrrolyldipyrrin skeleton, are known for their anti-cancer activity. Structural modification of the C-ring resulted in a series of prodigiosenes that displayed promising activity against leukemia cell lines during in v
One-pot synthesis of asymmetric annulated bis(pyrrole)s
Smithen, Deborah A.,Cameron, T. Stanley,Thompson, Alison
supporting information; experimental part, p. 5846 - 5849 (2012/01/13)
Condensation of activated functionalized pyrroles with acetone results in asymmetric bis(pyrrole)s, formed via ring annulation. The methodology is somewhat general and can be applied to a variety of ketones, as well as to a range of pyrrolic substrates that do not bear electron-withdrawing groups directly adjacent to the pyrrole ring.
5-Substituted pyrido[2,3-d]pyrimidine, an inhibitor against three receptor tyrosine kinases
Kammasud, Naparat,Boonyarat, Chantana,Sanphanya, Kingkan,Utsintong, Maleeruk,Tsunoda, Satoshi,Sakurai, Hiroaki,Saiki, Ikuo,André, Isabelle,Grierson, David S.,Vajragupta, Opa
scheme or table, p. 745 - 750 (2009/09/25)
NP506, the 3-{2,4-dimethyl-5-[2-oxo-5-(N′-phenylhydrazinocarbonyl)-1,2-dihydro-indol-3-ylidenemethyl]-1H-pyrrol-3-yl}-propionic acid, was designed as FGF receptor 1 inhibitor by computational study and found to be more active against endothelial proliferation of HUVEC after the rhFGF-2 stimulation than SU6668 with minimum effective dose of 10 μM. NP506 inhibited the tyrosine phosphorylation in FGF, VEGF, and PDGF receptors and the activation of extracellular signal-regulated kinase (ERK), c-Jun-N-terminal-kinase (JNK) and AKT after the rhFGF-2 stimulation. The introduction of the phenyl hydrazide motif to the position 5 of the pyrido[2,3-d]pyrimidine scaffold led to the inhibitory effect in two signaling pathways: inhibition of AKT activation in the phosphatidyl inositol 3′-kinase (PI13K)/AKT signaling pathway and the inhibition of ERK and JNK activation in MAPK pathway.
PH-SENSITIVE FLUORESCENT PROBE
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Page/Page column 5-6, (2009/09/26)
A compound represented by the following general formula (I): wherein R1 represents an amino group which may be substituted with one or two alkyl groups; R2, R3, R4 and R5 independently represent an al
Cell-based fluorescence screen for K+ channels and transporters using an extracellular triazacryptand-based K+ sensor
Namkung, Wan,Padmawar, Prashant,Mills, Aaron D.,Verkman
supporting information; experimental part, p. 7794 - 7795 (2009/02/01)
K+ channels and K+-coupled membrane transporters are important targets for drug discovery. We previously developed a triazacryptand (TAC)-based K+ sensor, TAC-Red, and demonstrated its utility to image K+ waves in mouse brain in vivo (Padmawar et al. Nat. Methods. 2005, 2, 825-827). Here, we synthesized a green-fluorescing dextran conjugate of TAC-bodipy ("TAC-Limedex") for use as an extracellular K+ sensor and demonstrated its utility in measuring K+ transport across cell membranes. TAC-Limedex fluorescence increased by 50% with increasing [K+] from 0 to 2 mM and was insensitive to [Na+], [Cl-], or pH. K+ efflux from cells was quantified from increasing extracellular TAC-Limedex fluorescence following cell immersion in K+-free buffer. In HT-29 cells, K+ efflux was 2.0 ± 0.1 μmol/cm2/s, increasing 8-fold following K+ channel activation by ATP; the increase in K+ efflux was inhibited by a K+ channel blocker or by preventing cytoplasmic calcium elevation. Electroneutral K+/Cl- cotransport was demonstrated in SiHa cells, in which K+ efflux was increased 3-fold by hypotonic challenge; the increase in K+ efflux was fully inhibited by a K+/Cl- transport blocker. K+ efflux measurements were adapted to a commercial fluorescence platereader for automated screening. The fluorescence-based K+ transport assay largely replaces assays requiring radioactive rubidium and is suitable for high-throughput identification of K+ transport modulators. Copyright
Novel inhibitor for fibroblast growth factor receptor tyrosine kinase
Kammasud, Naparat,Boonyarat, Chantana,Tsunoda, Satoshi,Sakurai, Hiroaki,Saiki, Ikuo,Grierson, David S.,Vajragupta, Opa
, p. 4812 - 4818 (2008/02/12)
NP603, the 6-dimethoxy phenyl indolin-2-one, was designed as FGF receptor 1 inhibitor by computational study. NP603 was synthesized and found to be more active against endothelial proliferation of HUVEC after the rhFGF-2 stimulation than SU6668 with minim
WATER-SOLUBLE, FLUORESCENT COMPOUNDS FOR DETECTION OF POTASSIUM IONS
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Page/Page column 63-64, (2008/06/13)
The invention provides chromoionophore compounds comprising a triazacryptand (TAC) K+ ionophore conjugated to at least a first chromophoric moiety (e.g., xanthylium dyes and derivatives thereof). In related embodiments, the chromoionophore compounds further comprise a second chromophoric moiety which is insensitive to potassium binding by the TAC ionophore, thus providing for dual wavelength detection and absolute determination of K+ concentration. The invention further provides methods and kits for the determination of K+ concentrations in biological systems, either in vitro or in vivo, using embodiments of inventive chromoionophores.
FLUORESCENT PROBES
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Page/Page column 7, (2008/06/13)
A compound represented by the formula (I) wherein R1 and R2 represent amino groups that substitute at adjacent positions on the benzene ring, wherein one of the amino groups may have one alkyl group; R3 and R4 r
Indolinone compounds as kinase inhibitors
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Page/Page column 96, (2010/11/30)
The invention relates to certain indolinone compounds, their method of synthesis, and a combinatorial library consisting of the indolinone compounds of the invention. The invention also relates to methods of modulating the function of protein kinases using indolinone compounds of the invention and methods of treating diseases by modulating the function of protein kinases and related signal transduction pathways.