Synthesis and serotonin receptor affinities of a series of enantiomers of .alpha.-methyltryptamines: evidence for the binding conformation of tryptamines at serotonin 5-HT1B receptors
作者:David E. Nichols、David H. Lloyd、Michael P. Johnson、Andrew J. Hoffman
DOI:10.1021/jm00402a026
日期:1988.7
a 5-hydroxy or 5-methoxy, the S enantiomer had higher affinity or was equipotent to the R enantiomer. This selectivity at [3H]serotonin binding sites was reversed for 4-oxygenated alpha-methyltryptamines, where a 4-hydroxy or 4-methoxy did not enhance affinity over the unsubstituted compounds. These results can be explained, for the [3H]serotonin displacement data, if the binding conformation is one
开发了从取代的吲哚制备光学纯的α-甲基色胺(AMT)的方法。序列中的关键步骤是用市售的α-甲基苄基胺的纯对映异构体对取代的吲哚-2-丙烷进行还原胺化,然后通过制备离心(色谱)色谱分离所得非对映异构胺对。然后催化N-脱苄基作用得到纯的AMT对映体。通过2-萘甲酰胺衍生物的手性HPLC分析确定光学纯度。还开发了一种改进的制备吲哚-2-丙烷的方法。为了探究5-羟色胺受体的构效关系,然后在5-HT2拮抗剂受体亚型下测量α-甲基色胺的对映体亲和力,在大鼠额叶皮层匀浆中,[3H]酮色林的位移分别为[3H] 5-羟色胺和[3H] 5-羟色胺的位移。取决于芳香族取代基,受体亚型的对映选择性不同。对于5-羟基或5-甲氧基,S对映体具有更高的亲和力或与R对映体等价。对于4-氧化的α-甲基色胺,在[3H] 5-羟色胺结合位点的选择性是相反的,其中4-羟基或4-甲氧基不增强未取代化合物的亲和力。对于[3H] 5-