with m- and p-tyramine (9 and 10, respectively) is likely due to the restriction of the side-chain conformation. The conformationally defined analogues 22-24 were less active than the conformationally restricted ones, 12-15, although the low-energy half-chair conformation of 2-aminotetralin is defined in 22-24. The reduced activity of 22-24 compared with the activity of 12-15 is probably due to the
在寻找
肾上腺素合成酶苯基
乙醇胺N-甲基转移酶(
PNMT;
EC 2.1.1.28)的选择性
抑制剂,
酚2-
氨基四氢化
萘(
酪胺的构象受限类似物为12-15)和
酚苯并双环[3.2.1]
辛胺(使用22-24作为
酪胺的构象定义类似物)来获得有关天然底物
去甲肾上腺素在
PNMT活性位点上的
儿茶酚羟基的结合相互作用的信息。另外,这些类似物提供了有关构象柔性
对酚性苯基
乙胺中
氨基乙基侧链的活性位相互作用的影响的信息,这可能有助于学习
去甲肾上腺素在
PNMT活性位点结合的方式。类似物22-24通过九步序列合成,其中,Friedel-Crafts型分子内环化是苯并
双环[3.2.1]辛烷骨架构建的关键步骤。对-
酪胺(10,Ki = 294 microM)比苯
乙胺(1,Ki = 854 microM)更有效,但间-
酪胺(9,Ki = 1250 microM)比苯基
乙胺(作为
PNMT抑制剂)的效力更弱。同样,在构象受限和