L-N<6>-(1-IMINOETHYL)LYSINE DERIVATIVES USEFUL AS NITRIC OXIDE SYNTHASE INHIBITORS

摘要

There are disclosed derivatives of L-N<6>-(1-iminoethyl)lysine of general formula (I), pharmaceutical compositions containing these compounds, and to their use in therapy, in particular their use as nitric oxide synthase inhibitors. Y is a hydrogen, lower alkyl radical, lower alkenyl radical, lower alkynyl radical, aromatic hydrocarbon radical, alicyclic hydrocarbon radical, amino, heterocyclyl radical in which 1 to about 4 heteroatoms are independently selected from oxygen, nitrogen and sulfur, wherein all said radicals may optionally be substituted with hydrogen, cyano, lower alkyl, nitro, amino, alicyclic hydrocarbon radicals, or aromatic hydrocarbon radicals which may be optionally substituted with lower alkyl; X is lower alkyl radical, lower alkenyl radical, lower alkynyl radical, aromatic hydrocarbon radical, (CH2)mQ(CH2)n, where m=1-3, n=1-3, and Q is sulfur, sulfinyl, sulfonyl or oxygen, C=O, lower alkynyl radical, aromatic hydrocarbon radical, alicyclic hydrocarbon radical or heterocyclyl radicals in which 1 to about 4 heteroatoms are independently selected from oxygen, nitrogen and sulfur, wherein all said radicals are optionally substituted with hydrogen, halogen and lower alkyl; R<1>, R<2>, R<3> and R<4> are independently selected from the group consisting of hydrogen and lower alkyl; A is a lower alkyl radical wherein said radical is optionally substituted with hydrogen, lower alkyl, hydroxyl, lower alkoxy, alkoxycarbonyl, alkylaryloxy, thiol, lower thioalkoxy, thioalkylaryloxy, thioaryloxy, sulfinylalkyl, sulfinylalkylaryl, sulfinylaryl, sulfonylalkyl, sulfonylalkylaryl, sulfonylaryl, halogen, aromatic hydrocarbon radicals, or alicyclic hydrocarbon radicals; or A can be a direct bond to the remainder of the molecule; B is CH2R<5> where R<5> is amidine, guandine, sulfonamide, amino which may be optionally substituted with alkyl, alkylaryl or aryl radicals.