摘要:
An investigation into the structure-activity relationship of a lead compound, prolyl-5-aminopentanoic acid 4, led to the identification of a novel series of 4-piperidinylacetic acid, 1-piperazinylacetic acid, and 4-aminobenzoic acid derivatives as potent VLA-4 antagonists with low nanomolar IC50 values. A representative compound morpholinyl-4-piperidinylacetic acid derivative (13d: IC50 = 4.4nM) showed efficacy in the Ascaris-antigen sensitized murine airway inflammation model by oral administration. (C) 2004 Elsevier Ltd. All rights reserved.