Zhang Hongjun, Boonsombat Jutatip, Padwa Albert
Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
Org Lett. 2007 Jan 18;9(2):279-82. doi: 10.1021/ol062728b.
A new strategy for the synthesis of the Strychnos alkaloid (+/-)-strychnine has been developed and is based on an intramolecular [4 + 2]-cycloaddition/rearrangement cascade of an indolyl-substituted amidofuran. The critical D-ring was assembled by an intramolecular palladium-catalyzed enolate-driven cross-coupling of an N-tethered vinyl iodide. [reaction: see text].
一种用于合成马钱子生物碱(±)-士的宁的新策略已被开发出来,该策略基于吲哚基取代的氨基呋喃的分子内[4 + 2]环加成/重排串联反应。关键的D环是通过分子内钯催化的烯醇盐驱动的N-连接的乙烯基碘的交叉偶联组装而成的。[反应:见正文]