Synthesis of spiro[tetralin-2,2'-pyrrolidine] and spiro[indan-2,2'-pyrrolidine] derivatives as potential analgesics
作者:Peter A. Crooks、Howard E. Rosenberg
DOI:10.1021/jm00204a016
日期:1978.6
Spiro[tetralin-2,2'-pyrrolidine] (13) and spiro[6-methoxytetralin-2,2'-pyrrolidine] (17) were prepared by initial Michael condensation of 2-nitrotetralin and 6-methoxy-2-nitrotetralin, respectively, with methyl acrylate to give 7 and 8, both of which could be reductively cyclized to 10 and 11, followed by LiAlH4 reduction. Spiro[indan-2,2'-pyrrolidine] (15) was prepared in an analogous manner form
螺旋[tetralin-2,2'-吡咯烷](13)和螺[6-甲氧基四氢-2,2'-吡咯烷](17)是通过2-硝基四氢萘和6-甲氧基-2-硝基四氢萘的初始迈克尔缩合制备的,分别用丙烯酸甲酯得到7和8,两者都可以被还原环化为10和11,然后进行LiAlH 4还原。以类似于2-硝基茚满的方式制备螺[茚满-2,2'-吡咯烷](15),并通过17的O-脱甲基化制备螺[6-羟基四氢-2,2'-吡咯烷](19)。化合物13及其N-甲基衍生物14均显示出良好的镇痛活性。化合物13-16均具有弱的抗抑郁性质,但是19及其N-甲基衍生物20均没有任何显着的CNS活性。