Selectivity enhancement induced by substitution of non-natural analogues of arginine and lysine in arginine-based thrombin inhibitors
摘要:
Seven non-natural analogues of arginine and lysine have been substituted in an established arginine-based thrombin inhibitor. Four of the new compounds exhibited significant thrombin inhibition (K-i's 0.53-3.95 muM) and were subsequently tested for selectivity against trypsin. The two best compounds gave selectivity ratios of 962 and 525 (trypsin/thrombin), improving upon the parent compound. (C) 2001 Elsevier Science Ltd. All rights reserved.
Asymmetric synthesis of non-natural homologues of lysine
摘要:
A series of non-natural amino acid homologues of L- and D-lysine have been synthesized and protected for use in solid-phase peptide synthesis. With these residues, electrostatics and hydrophobicity of peptides can be enhanced or altered. (C) 1997 Elsevier Science Ltd.