Pyridobenzothiazole derivatives as new chemotype targeting the HCV NS5B polymerase
摘要:
Hepatitis C virus (HCV) infection has been recognized as the major cause of liver failure that can lead to hepatocellular carcinoma. Among all the HCV proteins, NS5B polymerase represents a leading target for drug discovery strategies. Herein, we describe our initial research efforts towards the identification of new chemotypes as allosteric NS5B inhibitors. In particular, the design, synthesis, in vitro anti-NS5B and in cellulo anti-HCV evaluation of a series of 1-oxo-1H-pyrido[2,1-b][1,3]benzothiazole-4-carboxylate derivatives are reported. Some of the newly synthesized compounds showed an IC50 ranging from 11 to 23 mu M, and molecular modeling and biochemical studies suggested that the thumb domain could be the target site for this new class of NS5B inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
Pyridobenzothiazole derivatives as new chemotype targeting the HCV NS5B polymerase
摘要:
Hepatitis C virus (HCV) infection has been recognized as the major cause of liver failure that can lead to hepatocellular carcinoma. Among all the HCV proteins, NS5B polymerase represents a leading target for drug discovery strategies. Herein, we describe our initial research efforts towards the identification of new chemotypes as allosteric NS5B inhibitors. In particular, the design, synthesis, in vitro anti-NS5B and in cellulo anti-HCV evaluation of a series of 1-oxo-1H-pyrido[2,1-b][1,3]benzothiazole-4-carboxylate derivatives are reported. Some of the newly synthesized compounds showed an IC50 ranging from 11 to 23 mu M, and molecular modeling and biochemical studies suggested that the thumb domain could be the target site for this new class of NS5B inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
or di‐selective allylic substitution reaction of benzothiazolylacetate and allylicalcohols has been developed. The mono‐ and di‐selectivities could be efficiently controlled by changing the reaction solvent and temperature, affording various mono‐ and di‐allylated products in good to excellent yields and selectivities. Both linear and branched allylicalcohols as well as allyl alcohol could all be well
Discovery of CX-5461, the First Direct and Selective Inhibitor of RNA Polymerase I, for Cancer Therapeutics
作者:Mustapha Haddach、Michael K. Schwaebe、Jerome Michaux、Johnny Nagasawa、Sean E. O'Brien、Jeffrey P. Whitten、Fabrice Pierre、Pauline Kerdoncuff、Levan Darjania、Ryan Stansfield、Denis Drygin、Kenna Anderes、Chris Proffitt、Josh Bliesath、Adam Siddiqui-Jain、May Omori、Nanni Huser、William G. Rice、David M. Ryckman
DOI:10.1021/ml300110s
日期:2012.7.12
Accelerated proliferation of solid tumor and hematologic cancer cells is linked to accelerated transcription of rDNA by the RNA polymerase I (Pol I) enzyme to produce elevated levels of rRNA (rRNA). Indeed, upregulation of Pol I, frequently caused by mutational alterations among tumor suppressors and oncogenes, is required for maintenance of the cancer phenotype and forms the basis for seeking selective inhibitors of Pot I as anticancer therapeutics. 2-(4-Methyl-[1,4]diazepan-1-yl)-5-oxo-5H-7-thia-1,11b-diaza-benzo[c]fluorene-6-carboxylic acid (5-methyl-pyrazin-2-ylmethyl)-amide (CX-5461, 7c) has been identified as the first potent, selective, and orally bioavailable inhibitor of RNA Pot I transcription with in vivo activity in tumor growth efficacy models. The preclinical data support the development of CX-5461 as an anticancer drug with potential for activity in several types of cancer.
Pyridobenzothiazole derivatives as new chemotype targeting the HCV NS5B polymerase
Hepatitis C virus (HCV) infection has been recognized as the major cause of liver failure that can lead to hepatocellular carcinoma. Among all the HCV proteins, NS5B polymerase represents a leading target for drug discovery strategies. Herein, we describe our initial research efforts towards the identification of new chemotypes as allosteric NS5B inhibitors. In particular, the design, synthesis, in vitro anti-NS5B and in cellulo anti-HCV evaluation of a series of 1-oxo-1H-pyrido[2,1-b][1,3]benzothiazole-4-carboxylate derivatives are reported. Some of the newly synthesized compounds showed an IC50 ranging from 11 to 23 mu M, and molecular modeling and biochemical studies suggested that the thumb domain could be the target site for this new class of NS5B inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.