Optically Pure Isoproterenol Analogues With Side Chains Containing an Amide Bond: Synthesis and biological properties
作者:Hans P. Märki、Yvo Crameri、Rainer Eigenmann、Anna Krasso、Henri Ramuz、Karl Bernauer、Murray Goodman、Kenneth L. Melmon
DOI:10.1002/hlca.19880710204
日期:1988.3.16
The isoproterenol analogues 4a and 4b, synthesized as mixtures of Diastereoisomers, were shown to possess very potent β-adrenoceptor agonistic activity. Therefore, the four possible diastereoisomers of 4a have been synthesized and tested for inotropic activity. The (6R, 2′R)-diastereoisomer turned out to be the most interesting one. Consequently, also (6R,2′R)-4b has been prepared and tested. For the
合成为非对映异构体混合物的异丙肾上腺素类似物4a和4b具有非常强的β-肾上腺素受体激动活性。因此,已经合成了4a的四种可能的非对映异构体,并测试了其正性活性。的(6 - [R,2' - [R)-diastereoisomer原来是最有趣的一个。因此,也已经制备并测试了(6 R,2'R)-4b。对于非对映选择性合成,已阐述了三种变体:(i)环氧化物12与胺27的偶联(方案6);(二)将活化的二醇17与胺22偶联(方案8);(iii)氨基酮31的非对映选择性氢化(方案7)。(6 R,2'R)-4a和(6 R,2'R)-4b在静脉内和口服后均表现出持久的正性肌力活性,并且其效力至少是rac的三倍-异丙肾上腺素。在麻醉的狗中,观察到良好的正性肌力和正性变时作用的分离。但是,在清醒的狗中,心率和收缩力增加的幅度相同(可能是由于反射性心动过速)。