Organocatalytic Enantioselective Decarboxylative Protonation Reaction of Meldrum's Acid Derivatives under PTC Conditions
作者:Fabien Legros、Thomas Martzel、Jean-François Brière、Sylvain Oudeyer、Vincent Levacher
DOI:10.1002/ejoc.201800331
日期:2018.5.8
An organocatalyzed enantioselective protonation sequence that starts from readily available disubstituted Meldrum's acid derivatives and phenols, proceeds under phase‐transfer‐catalytic (PTC) conditions, and provides chiral nonracemic 2‐aryl propionic esters in good isolated yields with up to 70 % ee is presented. The usefulness of this method was demonstrated by the synthesis of enantioenriched (S)‐ibuprofen
一个organocatalyzed对映选择性质子化序列,从容易获得的二取代的麦德鲁姆酸衍生物与酚类,相转移催化(PTC)条件下进行,并开始提供手性非外消旋-芳基2与高达70%的良好的分离收率丙酸酯 EE呈现。富含对映体的(S)-布洛芬的合成证明了该方法的有效性。