4-Substituted-7-N-alkyl-N-acetyl 2-aminobenzothiazole amides: Drug-like and non-xanthine based A2B adenosine receptor antagonists
作者:Adrian Wai-Hing Cheung、John Brinkman、Fariborz Firooznia、Alexander Flohr、Joseph Grimsby、Mary Lou Gubler、Kevin Guertin、Rachid Hamid、Nicholas Marcopulos、Roger D. Norcross、Lida Qi、Gwendolyn Ramsey、Jenny Tan、Yang Wen、Ramakanth Sarabu
DOI:10.1016/j.bmcl.2010.05.056
日期:2010.7
7-N-Acetamide-4-methoxy-2-aminobenzothiazole 4-fluorobenzamide (compound 1) was chosen as a drug-like and non-xanthine based starting point for the discovery of A(2B) receptor antagonists because of its slight selectivity against A(1) and A(2A) receptors and modest A(2B) potency. SAR exploration of compound 1 described herein included modi. cations to the 7-N-acetamide group, substitution of the 4-methoxy group by halogens as well as replacement of the p-flouro-benzamide side chain. This work culminated in the identification of compound 37 with excellent A(2B) potency, modest selectivity versus A(2A) and A(1) receptors, and good rodent PK properties. (C) 2010 Elsevier Ltd. All rights reserved.