title: 1,2,4-Triazolo[4,3-a]pyrazine derivatives with human renin inhibitory activity. 3.1 Synthesis and biological properties of aminodeoxystatine and difluorostatone derivatives.
abstract: Two series of 1,2,4-triazolo[4,3-a]pyrazine derivatives with human renin inhibitory activity have been synthesized which incorporate the transition-state mimetics (3S,4S)- and (3R,4S)-5-cyclohexyl-3,4-diaminopentanoic acid ((S)- and (R)-CDAPA), and (4S)-4-amino-5-cyclohexyl-2,2-difluoro-3-oxopentanoic acid (ACDFOPA). Several compounds in these series, for example 13a, 19c, and 19f, were highly potent inhibitors of partially purified human renin (IC50 values of 3.9, 1.6, and 1.4 nM, respectively). The ACDFOPA-based compounds 19c and 19f contain no natural amino acid fragments and have molecular weights which compare well with those of previously reported inhibitors of nanomolar in vitro potency. When administered intravenously to anesthetized, sodium-depleted marmosets at doses of 3 mg/kg, compounds 13a and 19c caused a marked reduction in mean arterial pressure, but in the same animal model at 30 mg/kg, oral activity was not seen.
authors.affiliation: Department of Chemistry, ICI Pharmaceuticals, Macclesfield, Cheshire, U.K.
authors.forename: R H
authors.initials: RH
authors.lastname: Bradbury
authors.forename: J E
authors.initials: JE
authors.lastname: Rivett
mesh_terms: D000599:Amino Acids, Diamino / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D007202:Indicators and Reagents; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011719:Pyrazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011725:Pyridines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013329:Structure-Activity Relationship; D014230:Triazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000092502:Renin Inhibitors
chemical_list: D000599:Amino Acids, Diamino; D007202:Indicators and Reagents; D011719:Pyrazines; D011725:Pyridines; D014230:Triazoles; D000092502:Renin Inhibitors