Synthesis, pharmacology, and molecular modeling of novel 4-alkyloxy indole derivatives related to cannabimimetic aminoalkyl indoles (AAIs)
作者:A.K Dutta、W Ryan、B.F Thomas、M Singer、D.R Compton、B.R Martin、R.K Razdan
DOI:10.1016/s0968-0896(97)00111-9
日期:1997.8
Several novel 4-alkyloxy-aminoalkyl indole derivatives 3 were synthesized from 4-benzyloxyindole (1). Alkylation of 1 with 4-(2-chloroethyl)morpholine (NaH/HMPA) formed 2. Deprotection using palladium hydroxide on carbon/hydrogen followed by alkylation with the appropriate alkyl bromide gave the target compounds 3b-3j. In the synthesis of 3i and 3j, the appropriate alkyl bromides 13 and 17 were prepared
由4-苄氧基吲哚(1)合成了几种新颖的4-烷氧基-氨基烷基吲哚衍生物3。用4-(2-氯乙基)吗啉(NaH / HMPA)将1烷基化。2.在碳/氢上用氢氧化钯脱保护,然后用适当的烷基溴烷基化,得到目标化合物3b-3j。在3i和3j的合成中,使用如方案3所示的加长序列,由市售的1-萘基溴化物9制备适当的烷基溴化物13和17。在受体结合测定和体内测试中,长链烷氧基化合物3g和3h(Ki = 127 nM)对CB1受体的亲和力比WIN 55,225低约16-35倍。但是,3h的药理特性与WIN 55,212相似。对这些类似物的SAR的检查表明,AAI中的萘基通过氧(醚键)从C-3位置移位到C-4会降低活性,这与以前的发现相反,即C-4上的萘羰基保留了活动。本工作指出了酮基在与受体相互作用中的作用的重要性。分子建模工作表明,尽管可以在δ9-THC和AAI之间进行关键结构特征的合理叠加,但是覆盖并不容