Through directed screening of metalloprotease inhibitors. CGS 30084 (1) has
been identified as a potent endothelin-converting enzyme-1 (ECE-1) inhibit
or in vitro (IC50 = 77 nM). Herein we report the synthesis and biological a
ctivities of analogues derived from this lead. based on modifications of th
e biphenyl moiety. Compound 10. the thioacetate methyl ester prodrug deriva
tive of compound 6m. was found to he an orally active and potent inhibitor
of ECE-1 activity in rats. (C) 2001 Elsevier science Ltd. All rights reserv
ed.