Kinase Scaffold Repurposing for Neglected Disease Drug Discovery: Discovery of an Efficacious, Lapatanib-Derived Lead Compound for Trypanosomiasis
摘要:
Human African trypanosomiasis (HAT) is a neglected tropical disease caused by the protozoan parasite Trypanosoma brucei. Because drugs in use against HAT are toxic and require intravenous dosing, new drugs are needed. Initiating lead discovery campaigns by using chemical scaffolds from drugs approved for other indications can speed up drug discovery for neglected diseases. We demonstrated recently that the 4-anilinoquinazolines lapatinib (GW572016, 1) and canertinib (CI-1033) kill T. brucei with low micromolar EC50 values. We now report promising activity of analogues of 1, which provided an excellent starting point for optimization of the chemotype. Our compound optimization that has led to synthesis of several potent 4-anilinoquinazolines, including NEU617, 23a, a highly potent, orally bioavailable inhibitor of trypanosome replication. At the cellular level, 23a blocks duplication of the kinetoplast and arrests cytokinesis, making it a new chemical tool for studying regulation of the trypanosome cell cycle.
The present invention relates to halo sulfonyl aryl boronates of the general formula (I): wherein Arylene designates a carbocyclic or heterocyclic, aromatic ring system comprising 1-3 rings; R1, R2 and R3 are, independently, hydrogen, C1-6alkyl, C1-6alkoxy, halogen, nitro, cyano or phenyl;X is fluoro, chloro or bromo; and Y is a boroxine moiety attached via a bond from Arylene to one of the boron atoms of a boroxine ring which ring has a group of the formula -Arylene(R1)(R2)(R3)SO2X, wherein Arylene, R1, R2, R3 and X are as defined above, at each of the other two boron atoms of the boroxine ring, or Y is a boronic acid group or a boronic ester group.The invention also relates to the preparation of the compounds of formula (I) and to their use in organic synthesis.
Compounds and pharmaceutical compositions that modulate kinase activity, including PI3 kinase activity, and compounds, pharmaceutical compositions, and methods of treatment of diseases and conditions associated with kinase activity, including P13 kinase activity, are described herein.
Design and Evaluation of Novel Biphenyl Sulfonamide Derivatives with Potent Histamine H<sub>3</sub> Receptor Inverse Agonist Activity
作者:Jonathan A. Covel、Vincent J. Santora、Jeffrey M. Smith、Rena Hayashi、Charlemagne Gallardo、Michael I. Weinhouse、Jason B. Ibarra、Jeffrey A. Schultz、Douglas M. Park、Scott A. Estrada、Brian J. Hofilena、Michelle D. Pulley、Brian M. Smith、Albert Ren、Marissa Suarez、John Frazer、Jeffrey Edwards、Erin K. Hauser、Jodie Lorea、Graeme Semple、Andrew J. Grottick
DOI:10.1021/jm900857n
日期:2009.9.24
Phenethyl-R-2-methylpyrrolidine containing biphenylsulfonamide compounds were shown to be potent and selective antagonists of the H3 receptor. Several of these compounds demonstrated in vivo activity in a rat model of (R)-α-methyl histamine (RAMH) induced dipsogenia, and one compound (4e) provided an increase in wakefulness in rats as measured by polysomnographic methods. However, more detailed analysis of the PK/PD
Synthesis of Sulfonyl Chlorides of Phenylboronic Acids
作者:Per Vedsø、Thomas Hoeg-Jensen、Preben H. Olesen
DOI:10.1055/s-2004-817758
日期:——
Sulfonyl chlorides of phenylboronic esters have been made available by selective lithiation of bromo N-methyl-diethanolamine phenylboronates to give lithium sulfinyl phenylboronates as intermediates. Oxidations with N-chlorosuccinimide give the target sulfonyl chlorides, which may be isolated or used in situ for further reactions. The novel reagents are useful in preparation of among other sulfonamides of phenylboronic acids for use in Pd(0) catalysed cross-couplings. They also hold potential as carbohydrate binders with physiological pKa.
Kinase Scaffold Repurposing for Neglected Disease Drug Discovery: Discovery of an Efficacious, Lapatanib-Derived Lead Compound for Trypanosomiasis
作者:Gautam Patel、Caitlin E. Karver、Ranjan Behera、Paul J. Guyett、Catherine Sullenberger、Peter Edwards、Norma E. Roncal、Kojo Mensa-Wilmot、Michael P. Pollastri
DOI:10.1021/jm400349k
日期:2013.5.23
Human African trypanosomiasis (HAT) is a neglected tropical disease caused by the protozoan parasite Trypanosoma brucei. Because drugs in use against HAT are toxic and require intravenous dosing, new drugs are needed. Initiating lead discovery campaigns by using chemical scaffolds from drugs approved for other indications can speed up drug discovery for neglected diseases. We demonstrated recently that the 4-anilinoquinazolines lapatinib (GW572016, 1) and canertinib (CI-1033) kill T. brucei with low micromolar EC50 values. We now report promising activity of analogues of 1, which provided an excellent starting point for optimization of the chemotype. Our compound optimization that has led to synthesis of several potent 4-anilinoquinazolines, including NEU617, 23a, a highly potent, orally bioavailable inhibitor of trypanosome replication. At the cellular level, 23a blocks duplication of the kinetoplast and arrests cytokinesis, making it a new chemical tool for studying regulation of the trypanosome cell cycle.