Enantioselective Cascade Sequence to Indoloquinolizidines and Its Application in the Synthesis of epi-Geissochizol
作者:Xiaoyu Wu、Weiguo Cao、Gang Zhao、Yao Zhang、Xiaoyang Dai、Huihui Fang、Jie Chen
DOI:10.1055/s-0030-1260243
日期:2011.11
as a mixture of keto and enol tautomers. Such tautomeric pairs were transformed into stable compounds with an E-ethylidenyl group in telescoped steps. This method was successfully applied in the synthesis of epi-geissoschizol. Michael addition - organocatalysis - cyclization - enantioselectivity - reduction
开发了一种利用β-酮酰胺和脂肪族α,β-不饱和醛的有机催化一锅迈克尔加成反应和Pictet-Spengler序列,从而提供了以酮基和烯醇的混合物形式高取代度的吲哚[2,3- a ]喹喔啉类化合物的途径。互变异构体。在伸缩步骤中,将这样的互变异构对转化为具有E-亚乙基的稳定化合物。该方法已成功地应用于表位-geissoschizol的合成。 迈克尔加成-有机催化-环化-对映选择性-还原