Novel Syntheses of Tetrahydropyrroloquinolines: Applications to Alkaloid Synthesis
作者:Andrew J. Peat、Stephen L. Buchwald
DOI:10.1021/ja953080t
日期:1996.1.1
Two novel routes involving the intramolecular olefin insertion with a zirconium−benzyne complex, followed by a palladium-catalyzed aryl amination, have been developed for the synthesis of tetrahydropyrroloquinolines. In one approach, exemplified in the six-step total synthesis of the South American toad poison dehydrobufotenine (1), the tricyclic system was formed via the Pd-catalyzed ring closure
已经开发了两条新的路线,包括用锆 - 苄配合物插入分子内烯烃,然后是钯催化的芳基胺化,用于合成四氢吡咯并喹啉。在一种方法中,以南美蟾蜍毒物脱氢蟾蜍精 (1) 的六步全合成为例,三环系统是通过功能化色胺衍生物的 Pd 催化闭环形成的。在第二种情况下,适当取代的喹啉环化产生 13,这是合成达米罗酮 A 和 B 的中间体,以及马卡鲁胺 C,一种具有抗肿瘤特性的拓扑异构酶 II 抑制剂。