摘要:
SAR studies of a recently described SST5R selective benzoxazole piperidine lead series are described with particular focus on the substitution pattern on the benzyl and benzoxazole side-chains. Introduction of a second meta substituent at the benzyl unit significantly lowers residual hH1 activity and insertion of substituents onto the benzoxazole periphery entirely removes remaining h5-HT(2B) activity. Compounds with single digit nM activity, functional antagonism and favorable physicochemical properties endowed with a good pharmacokinetic pro. le in rats are described which should become valuable tools for exploring the pharmacological role of the SST5 receptor in vivo. (c) 2009 Elsevier Ltd. All rights reserved.