Synthesis of N1-Phenethyl Substituted Indole Derivatives as New Melatoninergic Agonists and Antagonists.
作者:Andrew Tsotinis、Margarita Vlachou、Andreas Eleutheriades、Effie Prinea、Darren Ebreo、Muy-Teck The、David Sugden
DOI:10.1248/cpb.50.31
日期:——
The potency of new indolic N1-phenethyl substituted melatoninergic ligands with and without methyl groups in the α and β position of the alkanamidoethyl side chain was examined using the pigment aggregation response in a clonal line of Xenopus laevis melanophores. The non 5-OMe substituted compounds, 8a—e, are all weak antagonists while introduction of the 5-OMe group, 9a—e, increases both agonist and antagonist activity except for 9c (R=C3H7), which is only an agonist and 9e (R=c-C4H7), which is only an antagonist. Introduction of an α-methyl group into the 5-OMe derivatives, 14a—e, reduces the agonist potency while introduction of a β-methyl group has only a small effect on either the agonist or antagonist potency. Double β-methyl substitution of the 5-OMe derivatives, 20a—e, generally increases the agonist potential (20c, R=C3H7 is the most potent agonist of the compounds described) and decreases the antagonist potency, except for 20a (R=CH3), which is the most potent antagonist of this series of compounds.
新型吲哚基N1-苯乙基取代的褪黑激素配体的效力通过使用克隆的非洲爪蟾黑素细胞的色素聚集反应进行了研究,比较了在烷酰胺乙基侧链的α和β位置上有无甲基基团的情况。未取代5-OMe的化合物8a-e均为弱拮抗剂,而引入5-OMe基团的化合物9a-e则增加了激动剂和拮抗剂的活性,除了9c(R=C3H7),它仅为激动剂,和9e(R=c-C4H7),它仅为拮抗剂。在5-OMe衍生物中引入α-甲基基团(14a-e)降低了激动剂的效力,而引入β-甲基基团对激动剂或拮抗剂的效力影响甚微。对5-OMe衍生物进行双β-甲基取代(20a-e)通常会增加激动剂的潜力(20c,R=C3H7是描述的化合物中最强的激动剂),并降低拮抗剂的效力,除了20a(R=CH3),它是这一系列化合物中最强的拮抗剂。