A general strategy for the synthesis of indoloquinolizine alkaloids <i>via</i> a cyanide-catalyzed imino-Stetter reaction
作者:Eunjoon Park、Cheol-Hong Cheon
DOI:10.1039/c7ob02691a
日期:——
A new strategy applicable to the synthesis of indoloquinolizine natural products has been developed. A cyanide-catalyzed intramolecular imino-Stetter reaction of aldimines, derived from 2-aminocinnamic acid derivatives and 2-pyridinecarboxaldehydes, provided indole-3-acetic acid derivatives bearing a pyridyl ring at the 2-position. Reduction of the carboxylic acid moiety to an alcohol followed by activation
已开发出一种适用于吲哚喹啉嗪天然产物合成的新策略。由2-氨基肉桂酸衍生物和2-吡啶羧醛衍生的醛亚胺的氰化物催化的分子内亚氨基-Stetter反应提供了在2-位带有吡啶环的吲哚-3-乙酸衍生物。羧酸部分还原成醇,然后用Tf 2 O或TsCl活化生成的醇生成吲哚并喹啉鎓盐,它们用作吲哚并喹啉嗪天然产物的前体。该方案的优点已在阿波西汀A和nauclefidine的总合成中得到了成功证明。