Pyrrolizidine Alkaloids by Intramolecular Palladium-Catalysed Allylic Alkylation: Synthesis of (±)-Isoretronecanol
作者:Sébastien Lemaire、Giuliano Giambastiani、Guillaume Prestat、Giovanni Poli
DOI:10.1002/ejoc.200400135
日期:2004.7
An efficient and stereoconvergent approach to 3-substituted hexahydroindol-2-one derivatives by palladium-catalysed intramolecular allylic alkylation has been developed. Subsequently, the straightforward conversion of the hexahydroindol-2-one 7d into the alkaloid (±)-isoretronecanol has been performed. The synthesis entails 11 steps starting from 1,3-cyclohexadiene, affording the final target in a
已开发出一种通过钯催化的分子内烯丙基烷基化来制备 3-取代的六氢吲哚-2-one 衍生物的有效立体收敛方法。随后,六氢吲哚-2-one 7d 直接转化为生物碱 (±)-isoretronecanol。该合成需要从 1,3-环己二烯开始的 11 个步骤,以 29% 的总产率提供最终目标。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)