作者:Roly J. Armstrong、Meganathan Nandakumar、Rafael M. P. Dias、Adam Noble、Eddie L. Myers、Varinder K. Aggarwal
DOI:10.1002/anie.201804446
日期:2018.7.2
substituted allenes is described. Highly enantioenriched, point‐chiral boronic esters were synthesized by homologation of α‐seleno alkenyl boronic esters with lithiated carbamates and eliminated to form axially chiral allene products. By employing either oxidative or alkylative conditions, both syn and anti elimination could be achieved with complete stereospecificity. The process enables the synthesis
描述了一种合成多取代丙二烯的对映发散方法。通过将α-硒代烯基硼酸酯与锂化氨基甲酸酯同系化并消除以形成轴向手性丙二烯产物,可以合成高度对映体富集的点手性硼酸酯。通过使用氧化或烷基化条件,可以实现完全立体定向的顺消除和反消除。该工艺能够从点手性前体的单一异构体合成M或P 丙二烯,并可用于二、三和四取代丙二烯的对映选择性组装。