High-Pressure Accelerated Asymmetric Organocatalytic Friedel–Crafts Alkylation of Indoles with Enones: Application to Quaternary Stereogenic Centers Construction
作者:Dawid Łyżwa、Krzysztof Dudziński、Piotr Kwiatkowski
DOI:10.1021/ol300274u
日期:2012.3.16
organocatalytic Friedel–Crafts alkylation of indoles with α,β-unsaturated ketones was found to be efficiently accelerated under high-pressure conditions with a low loading of chiral primary amine salts with good yield and enantioselectivity up to 90%. This approach also allows, for the first time, selected indole derivatives containing quaternary stereogenic centers to be obtained from prochiral β,β-disubstituted
发现在高压条件下,手性伯胺盐的负载量低,吲哚的α,β-不饱和酮的有机催化弗里德尔-克拉夫茨烷基化反应可以有效地加速,产率高,对映选择性高达90%。该方法还首次允许从前手性β,β-二取代的烯酮中选择对映体选择性高达80%的化合物,所述吲哚衍生物包含季立体位中心。