Multisubstrate inhibitors of dopamine .beta.-hydroxylase. 1. Some 1-phenyl and 1-phenyl-bridged derivatives of imidazole-2-thione
摘要:
The synthesis and characterization of some 1-(phenylalkyl)imidazole-2-thiones as a novel class of "multisubstrate" inhibitors of dopamine beta-hydroxylase (DBH) are described. These inhibitors incorporate structural features that resemble both tyramine and oxygen substrates, and as evidenced by steady-state kinetics, they appear to bind both the phenethylamine binding site and the active site copper atom(s) in DBH. A series of structural congeners that incorporate different bridging chain lengths between the phenyl ring (dopamine mimic) and the imidazole-2-thione group (oxygen mimic) define the optimum distance for inhibitory potency and the likely intersite distance in the DBH active site. Additional bridging analogues were prepared to determine the active site bulk tolerance and the effects of heteroatom replacement.
Multisubstrate inhibitors of dopamine .beta.-hydroxylase. 1. Some 1-phenyl and 1-phenyl-bridged derivatives of imidazole-2-thione
摘要:
The synthesis and characterization of some 1-(phenylalkyl)imidazole-2-thiones as a novel class of "multisubstrate" inhibitors of dopamine beta-hydroxylase (DBH) are described. These inhibitors incorporate structural features that resemble both tyramine and oxygen substrates, and as evidenced by steady-state kinetics, they appear to bind both the phenethylamine binding site and the active site copper atom(s) in DBH. A series of structural congeners that incorporate different bridging chain lengths between the phenyl ring (dopamine mimic) and the imidazole-2-thione group (oxygen mimic) define the optimum distance for inhibitory potency and the likely intersite distance in the DBH active site. Additional bridging analogues were prepared to determine the active site bulk tolerance and the effects of heteroatom replacement.
Intermediates useful in the preparation of dopamine-beta-hydroxylase inhibitors
申请人:SMITHKLINE BEECHAM CORPORATION
公开号:EP0308573A2
公开(公告)日:1989-03-29
Compounds of Structure (III) :
in which Y' is -OCH3; X1 is -H, halogen, C1-4 alkyl, -CN, -N02, -S02NH2, -C02H, -CONH2, -CHO, -CH20H, -CF3, -OCH3, -SO2C1-4 alkyl, -SO2C1-4 fluoralkyl, or -CO2C1-4 alkyl; and useful as intermediates in the preparation of novel dopamine β-hydroxylase inhibitors.