Synthesis of trans-fused lactones containing; the indane nucleus has result
ed in a series of potent acylating inhibitors of thrombin. As an er;ample c
ompound Ile has an apparent second order rate constant of 11x10(6) M(-1)sec
(-1) for the inhibition of thrombin. The anticoagulant activity of these co
mpounds is discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.