作者:Tetsutaro Hattori、Yuhi Shimazumi、Hitoshi Goto、Osamu Yamabe、Naoya Morohashi、Wataru Kawai、Sotaro Miyano
DOI:10.1021/jo026747k
日期:2003.3.1
l-2-carboxylic ester 14 to 7-isopropoxy-4-methoxy-2-(methoxymethoxy)phenanthren-9-ol (15). The racemic blestriarene C was optically resolved by chiral HPLC on a preparative scale to give several 10-mg yields of both the enantiomers in up to 95% ee. The absolute stereochemistry was determined to be S(a)-(-) by the axial chirality recognition method, which was based on the stereospecific formation of
以13个步骤制备了天然存在的1,1'-联菲,blestriarene C(1),总产率为30%。关键步骤是通过2-甲氧基-4-甲氧基甲氧基-6-甲基苯基溴化镁(5)在2,6-二叔丁基-4-甲氧基苯基5-异丙氧基-2-甲氧基苯甲酸酯(4)上进行酯介导的亲核芳族取代(5) )和所得的4-异丙氧基-2'-甲氧基-4'-甲氧基甲氧基-6'-甲基联苯-2-羧酸酯14的新型分子内环化为7-异丙氧基-4-甲氧基-2-(甲氧基甲氧基)菲蒽9 -ol(15)。外消旋的s三芳烃C通过手性HPLC以制备规模光学拆分,得到两种对映异构体的数为10mg的收率,至多95%ee。通过轴向手性识别方法将绝对立体化学确定为S(a)-(-),这是基于立体定向形成的12元环状二酯,其中包含两个通过酯-CO(2)-键连接的联芳基-o,o'-二基单元。通过这种12元环状二酯的X射线晶体学分析和从头构象分析,证实了该方法的有效性。发