Author/Authors :
Stephen F. Brady، نويسنده , , John T. Sisko، نويسنده , , Kenneth J. Stauffer، نويسنده , , Christiana D. Colton، نويسنده , , Howard Qiu، نويسنده , , Sidney D. Lewis، نويسنده , , Assunta S. Ng، نويسنده , , Jules A. Shafer، نويسنده , , Michael J. Bogusky، نويسنده , , Daniel F. Veber، نويسنده , , Ruth F. Nutt، نويسنده ,
Abstract :
We report structure-activity investigations in a series of tripeptide amide inhibitors of thrombin, and the development of a series of highly potent active site directed α-keto carbonyl inhibitors having the side chain of lysine at P1. Compounds of this class are unstable by virtue of reactivity at the electrophilic carbonyl and racemization at the adjacent carbon (CH). Modifications of prototype α-keto-ester 8a have afforded analogs retaining nanomolar Ki. Optimal potency and stability have been realized in α-keto-amides 11b (Ki = 2.8 nM) and 11c (Ki = 0.25 nM)
