Trapping of chiral enolates generated by Lewis acid promoted conjugate addition of Grignard reagents to unreactive Michael acceptors by various electrophiles
作者:Denisa Vargová、Juana M. Pérez、Syuzanna R. Harutyunyan、Radovan Šebesta
DOI:10.1039/c9cc05041h
日期:——
Here we show trapping of chiral enolates with carbenium ions, Michael acceptors, and bromine. Silyl ketene aminals, disilyl acetals, and aza-enolates were obtained via Lewis acid mediated enantioselective conjugate addition of Grignard reagents to unsaturated amides, carboxylic acids and alkenyl heterocycles.
在这里,我们显示了碳正离子,迈克尔受体和溴对手性烯醇化物的捕获。通过格氏试剂的路易斯酸介导的对映选择性共轭加成到不饱和酰胺,羧酸和烯基杂环上,可获得甲硅烷基烯酮缩醛,二甲硅烷基缩醛和氮杂-烯醇酸酯。