Journal of Medicinal Chemistry p. 1630 - 1640 (1993)
Update date:2022-07-30
Topics:
Kimura
Takase
Hayashi
Tanaka
Ohtsuka
Saeki
Kogushi
Yamada
Fujimori
Saitou
Akasaka
We have discovered N-butyl-N'-[2-(dimethylamino)-6-[3-(4-phenyl-1H- imidazol-1-yl)propoxy]phenyl]urea (4), a novel, potent, and systemically bioavailable inhibitor of ACAT (acylCoA:cholesterol O-acyltransferase). The structure-activity relationships (SARs) of this lead compound 4 were investigated by systematic modification of four regions in the molecule. The compounds prepared in this study were tested for in vitro inhibitory activity toward both aortic and intestinal ACATs, and selected compounds were further tested for in vivo hypocholesterolemic activity. The studies not only resulted in the discovery of N-[2-(dimethylamino)-6-[3-(5-methyl-4-phenyl- 1H-imidazol-1-yl)propoxy]phenyl]-N'-pentylurea (24), with potent activity and moderate plasma level after oral administration, but also revealed the SAR in each modified region. Four compounds (4, 13, 14, 24) were further selected for testing of in vivo antiatherosclerotic activity; 4, 13, and 24 reduced atherosclerotic plaque development to 38-45% of the control value in terms of area, while 14 did not have a significant antiatherosclerotic effect.
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