Imidazole acetic acid TAM inhibitors:: SAR studies centered around the basic P′1 group

Structural modifications of the aminopyridine P'(1), group of imidazole acetic acid based TAFla inhibitors led to the discovery of the aminocyclopentyl analog 28, a 1 nM TAFla inhibitor with CLT50 functional activity of 14 nM but without selectivity against CPB. While not as active, aminobutyl derivative 27 provided an improved 6.7-fold selectivity for TAFla versus CPB. (C) 2004 Elsevier Ltd. All rights reserved.