Isosteric side chain analogs of 3a were synthesized and tested for inhibitory activivies towards 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) synthase and upon cholesterol production in Hep G2 cells and in mouse liver. It became clear that the lipophilic substituent on the aromatic ring and the terminal hydrophilic group in the side chain were important in the enhancement of activity. 4-[2-(3-n-Hexyloxyphanyl)ethyl]-3-hydroxymethyl-2-oxetanone (5a) showed equivalent inhibitory activity in vivo to that of 1233A.
同位素侧链类似物3a被合成并测试了对3-羟基-3-甲基戊二酰
辅酶A(
HMG-CoA)合酶以及在Hep G2细胞和小鼠肝脏中
胆固醇生成的抑制活性。结果表明,芳环上的亲脂性取代基和侧链末端的亲
水性基团对活性的增强非常重要。4-[2-(3-正己氧基苯基)乙基]-3-羟甲基-2-氧杂
环丁酮(5a)在体内的抑制活性与1233A相当。