作者:Lokesh Ravilla、N. Venkata subba Naidu、Shalini Dogra、Deepmala Umrao、Prem N. Yadav、Ansuman Biswas、Daliah Michael、Kanagaraj Sekar、Kuppuswamy Nagarajan
DOI:10.1021/acs.jmedchem.7b00643
日期:2017.8.10
arylpiperazines 4 and 5 were reported to be pan opioid receptor antagonists, while 6 was a MOR agonist. Two compounds (13l and 11b) showed analgesic response in tail flick test which was blocked by pretreatment with norbinaltorphimine (norBNI). Among 10 1-(α-carboxycinnamyl)-4-arylpiperidines, compound 28g and five others were specific MOR antagonists. Interestingly, compound 26b of this series was found to
为了获得选择性和有效的阿片样物质受体配体,我们合成了alvimopan的脱氢衍生物,并发现了化合物(28f),它是一种选择性但中等亲和力的MOR拮抗剂,比alvimopan(1)弱。我们用芳基哌嗪取代了芳基哌啶单元,从而获得了1-(α-羧肉桂基)-4-芳基哌嗪,如13h,令我们惊讶的是它没有MOR或DOR活性,但却是具有中等亲和力的KOR激动剂。相反,文献报道的芳基哌嗪4和5的文献实例是泛阿片受体拮抗剂,而6是MOR激动剂。两种化合物(13l和11b)在甩尾试验中显示出镇痛反应,该反应被降冰片碱(norBNI)预处理所阻断。在10种1-(α-羧基肉桂基)-4-芳基哌啶中,化合物28g和其他5种是特异性MOR拮抗剂。有趣的是,发现该系列化合物26b比纳洛酮更有效,但比1弱。对接研究解释了上述哌嗪和哌啶的不同活性。