Potent Inhibitors of Acyl-CoA:Cholesterol Acyltransferase. 2. Structure−Activity Relationships of Novel N-(2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl)amides
1996
Novel N-(2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)amide derivatives 1 were synthesized and tested for their ability to inhibit rabbit small intestinal ACAT (acyl-CoA:cholesterol acyltransferase) and lower serum total cholesterol in cholesterol-fed rats. Among the synthesized compounds, N-(2,2,4,6-tetramethyl-2,3-dihydrobenzofuran-7-yl)amide derivatives showed potent ACAT inhibitory activity. The synthesis and structure−activity relationships of these compounds are described. A methyl group at position 6 of the 2,3-dihydrobenzofuran moiety was important for potent ACAT inhibitory activity. In the series of N-(2,2,4,6-tetramethyl-2,3-dihydrobenzofuran-7-yl)amides, lipophilicity of the acyl moiety was necessary for the potent ACAT inhibitory activity. The highly lipophilic acid amides N-(2,2,4,6-tetramethyl-2,3-dihydrobenzofuran-7-yl)-2,2-dimethyldodecanamide (10) and 6-(4-chlorophenoxy)-N-(2,2,4,6-tetramethyl-2,3-dihydrobenzofuran-7-yl)-2,2-dimethyloctanamide (50) showed potent activity. Introduction of a di...
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