Hit-to-lead studies on benzimidazole inhibitors of ITK: Discovery of a novel class of kinase inhibitors
摘要:
Benzimidazole 1 was identified as a selective inhibitor of ITK by high throughput screening. Hit-to-lead studies defined the SAR at all three substituents. Reversing the amide linkage at C6 led to 16, with a fivefold improvement of potency. This enhancement is rationalized by the conformational preference of the substituent. A model for the binding of the benzimidazoles to the ATP-binding site of ITK is proposed. (c) 2007 Elsevier Ltd. All rights reserved.
Disclosed are substituted benzimidazole compounds of formula (I) wherein R1, R2, R3, R4 and Xa are defined herein. The compounds of the invention inhibit Itk kinase and are therefore useful for treating diseases and pathological conditions involving inflammation, immunological disorders and allergic disorders. Also disclosed are processes for preparing these compounds and the pharmaceutical compositions comprising these compounds.
Hit-to-lead studies on benzimidazole inhibitors of ITK: Discovery of a novel class of kinase inhibitors
作者:Roger J. Snow、Asitha Abeywardane、Scot Campbell、John Lord、Mohammed A. Kashem、Hnin Hnin Khine、Josephine King、Jennifer A. Kowalski、Steven S. Pullen、Teresa Roma、Gregory P. Roth、Christopher R. Sarko、Noel S. Wilson、Michael P. Winters、John P. Wolak、Charles L. Cywin
DOI:10.1016/j.bmcl.2007.04.045
日期:2007.7
Benzimidazole 1 was identified as a selective inhibitor of ITK by high throughput screening. Hit-to-lead studies defined the SAR at all three substituents. Reversing the amide linkage at C6 led to 16, with a fivefold improvement of potency. This enhancement is rationalized by the conformational preference of the substituent. A model for the binding of the benzimidazoles to the ATP-binding site of ITK is proposed. (c) 2007 Elsevier Ltd. All rights reserved.