Inhibitors of acyl-CoA:cholesterol acyltransferase. 4. A novel series of urea ACAT inhibitors as potential hypocholesterolemic agents
作者:Bharat K. Trivedi、Ann Holmes、Terri L. Stoeber、C. John Blankley、W. Howard Roark、Joseph A. Picard、Mary K. Shaw、Arnold D. Essenburg、Richard L. Stanfield、Brian R. Krause
DOI:10.1021/jm00074a011
日期:1993.10
We have synthesized a series of N-phenyl-N'-aralkyl and N-phenyl-N'-(1-phenylcycloalkyl)ureas as inhibitors of acyl-CoA:cholesterol acyltransferase (ACAT). This intracellular enzyme is thought to be responsible for the esterification of dietary cholesterol; hence inhibition of this enzyme could reduce diet-induced hypercholesterolemia. For this series of compounds, the in vitro ACAT inhibitory activity
我们合成了一系列的N-苯基-N'-芳烷基和N-苯基-N'-(1-苯基环烷基)脲作为酰基辅酶A:胆固醇酰基转移酶(ACAT)的抑制剂。人们认为这种细胞内酶负责饮食中胆固醇的酯化。因此抑制这种酶可以减少饮食引起的高胆固醇血症。对于这一系列化合物,通过增加苯环上2,6-取代基的体积来提高体外ACAT抑制活性。此外,我们发现芳环的间距对于ACAT抑制活性至关重要。离必需的2,6-二异丙基苯基部分5个原子的苯环对于体外活性而言是最佳的。N'-苯基部分被α取代增强了体外效能。就苯基环烷基脲而言,ACAT抑制活性与环烷基环的大小无关。从该系列类似物中,发现在高胆固醇血症动物模型中以50 mg / kg的饮食施用时,具有出色的体外抑制ACAT效力的化合物25在体内可使血浆胆固醇降低73%。在此模型中,化合物25依赖于降低血浆胆固醇剂量,并且与Lederle ACAT抑制剂CL 277082一样有效。