Synthesis and analgesic properties of some conformationally restricted analogs of profadol
作者:Peter A. Crooks、Richard Szyndler
DOI:10.1021/jm00180a021
日期:1980.6
N-Methylspiro[5-hydroxytetralin-1,3'-pyrrolidine] (2j) and N-methylspiro[7-hydroxytetralin-1,3'-pyrrolidine] (2n), conformationally restricted analogues of profadol, were synthesized via initial reaction of the appropriately substituted 1-tetralone with ethyl cyanoacetate to give the ethyl 1-tetralylidenecyanoacetate derivative (3), which was then reacted with KCN to give the corresponding 1-cyano
N-甲基螺基[5-羟基四氢-1,3'-吡咯烷](2j)和N-甲基螺基[7-羟基四氢-1,3'-吡咯烷](2n),是异丙酚的构象受限类似物,是通过以下方法合成的:用氰基乙酸乙酯适当取代的1-四氢萘酮,得到1-四亚乙基氰基乙酸乙酯衍生物(3),然后使其与KCN反应,得到相应的1-氰基-1-(氰甲基)四氢化萘(4)。在干燥的乙醚-二氯甲烷或乙酸-硫酸中用HBr处理4,得到螺[tetralin-1,3'-吡咯烷-2',5'-二酮]衍生物(5),然后将其用LiAlH4-还原THF并用HCHO-HCO2H N-甲基化,得到适当取代的螺[tetralin-1,3'-吡咯烷](2)。在热板试验和扭体试验中,2j和2n以及异构体6-羟基衍生物21均未显示出明显的镇痛活性。然而,螺[tetralin-1,3'-pyrrolidine](2a)及其N-甲基衍生物(2b)都具有可待因水平的镇痛活性。