Synthesis, X-ray Crystallography, and Pharmacokinetics of Novel Azomethine Prodrugs of (R)-.alpha.-Methylhistamine: Highly Potent and Selective Histamine H3 Receptor Agonists
作者:Michael Krause、Agnes Rouleau、Holger Stark、Peter Luger、Ralph Lipp、Monique Garbarg、Jean-Charles Schwartz、Walter Schunack
DOI:10.1021/jm00020a022
日期:1995.9
Since various neuroregulatory functions of the histamine H3 receptor have been proved during the last few years, the H3 receptor is of current interest. Azomethine derivatives of the highly potent histamine H3 receptor agonist (R)-alpha-methylhistamine (1) were prepared as lipophilic prodrugs to improve the bioavailability of the hydrophilic drug, particularly its entry into the brain. Additionally
由于在最近几年中已证明组胺H3受体的各种神经调节功能,所以H3受体是当前关注的。将强效组胺H3受体激动剂(R)-α-甲基组胺(1)的偶氮甲碱衍生物制备为亲脂性前药,以提高亲水性药物的生物利用度,尤其是其进入大脑的效率。此外,偶氮甲碱衍生化作用可抵抗组胺甲基转移酶(人体内的主要代谢酶),从而有效提高1的生物利用度。(R)-2(-)[[N(-)[1-(1H-咪唑-4-基)-2-丙基]-亚氨基]苯基甲基]苯酚(9a)和(R)-4-氟-2(-)[[N(-)[1-(1H-咪唑-4-基通过X射线结构分析确定)-2-丙基[亚氨基-(4-氯苯基)甲基]苯酚(9p)。由此确认了对于这些偶氮甲碱的稳定性必不可少的分子内氢键。此外,在体外以及体内研究了前药的药代动力学参数。卤代甲亚胺在小鼠经口给药后会产生作用,其中一些似乎对1的中枢神经系统(CNS)传递非常有效。目前,最有效的1的前药是(R)-4-氯- 2(-