Amidine derivatives which are inhibitors of nitric oxide synthase
申请人:——
公开号:US20020137750A1
公开(公告)日:2002-09-26
There are provided novel compounds of formula (I)
1
wherein R
1
, R
2
, X, Y and Z are as defined in the Specification and optical isomers, racemates and tautomers thereof and pharmaceutically acceptable salts thereof; tocether with processes for their preparation, compositions containing them and their use in therapy. The compounds are inhibitors of the enzyme nitric oxide synthase.
Peptide derivatives provided by the present invention are compounds of the general formula ##STR1## wherein R.sup.1 represents a hydrogen atom or the methyl or hydroxymethyl group or a mono-, di- or trihalomethyl mgroup; R.sup.2 represents the characterizing group of an .alpha.-amino acid of the type normally found in proteins or a lower alkyl or hydroxy- (lower alkyl) group other than the characterising group of an .alpha.-amino acid of the type normally found in proteins; R.sup.3 represents a lower alkyl, lower cycloalkyl, lower alkenyl, aryl or aryl-(lower alkyl) group; R.sup.4 represents a hydrogen atom or a lower alkyl group; n stands for 1,2 or 3; the configuration at the carbon atom designated as (a) is (R) when R.sup.1 represents other than a hydrogen atom and the configuration at the carbon atom designated as (b) is (L) when R.sup.2 represents other than a hydrogen atom, and pharmaceutically acceptable salts thereof. The compounds exhibit activity as antibacterial agents against a range of gram-positive and gram-negative bacteria. Also disclosed are intermediates and a process for the production of the end product.