The design, synthesis and SAR of amido-(propyl and allyl)-hydroxybenzamidin
e coagulation factor Xa inhibitors is described. These achiral inhibitors a
re selective for fXa vis a vis structurally related serine proteases and ar
e readily prepared in 6-7 linear steps. The most potent member 9j (fXa K-i
= 0.75 nM) is selective (>1000-fold) and an effective anticoagulant in mamm
alian plasma. (C) 2000 Elsevier Science Ltd. All rights reserved.