Synthesis and SAR of Thrombin Inhibitors Incorporating a Novel 4-Amino-Morpholinone Scaffold: Analysis of X-ray Crystal Structure of Enzyme Inhibitor Complex
摘要:
A 4-amino-2-carboxymethyl-3-morpholinone structural motif derived from malic acid has been used to Mimic D-Phe-Pro in the thrombin inhibiting tripeptide D-Phe-Pro-Arg. The arginine in D-Phe-Pro-Arg was replaced by the more rigid P1 truncated p-amidinobenzylamine (Pab). These new thrombin inhibitors were used to probe the inhibitor binding site of alpha-thrombin. The best candidate in this series of thrombin inhibitors exhibits an in vitro IC50 of 0.130 muM. Interestingly, the stereochemistry of the 4-amino-2-carboxymethyl-3-morpholinone motif is reversed for the most active compounds compared to that of a previously reported 2-carboxymethyl-3-morpholinone series. The X-ray crystal structure of the lead inhibitor cocrystallized with alpha-thrombin is discussed.
Enantiospecific synthesis of isomers of AES, a new environmentally friendly chelating agent
作者:Petri M. Pihko、Terhi K. Rissa、Reijo Aksela
DOI:10.1016/j.tet.2004.09.024
日期:2004.11
Three four-step enantiospecific syntheses of different diastereomers of AES, a new biodegradable chelating agent, are described. The stereocenters in each of the isomers are accessible from L- and D-malic and aspartic acids. (C) 2004 Elsevier Ltd. All rights reserved.