A new series of beta amino acids, which act as CXCR3 antagonists, has been identified. The formerly optimized N,N-disubstituted benzylamine derivatives with carboxylic acid function on the N-atom was used as starting point and compounds with carboxyl function not attached to the N-atom were investigated. Affinity, metabolic stability in human and mouse liver microsomes and Caco-2 permeability were optimized. Compounds with double-digit nanomolar CXCR3 affinity, favourable microsomal stability and Caco-2 permeability have been identified.
Keywords: CXCR3 antagonist; Caco-2 permeability; Chemokine receptor; Inflammatory disease; Microsomal stability.
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