Regio‐ and Stereoselective 1,2‐Carboboration of Ynamides with Aryldichloroboranes
作者:Cai You、Mika Sakai、Constantin G. Daniliuc、Klaus Bergander、Shigehiro Yamaguchi、Armido Studer
DOI:10.1002/anie.202107647
日期:2021.9.27
Catalyst-free 1,2-carboboration of ynamides is presented. Readily available aryldichloroboranes react with alkyl- or aryl-substituted ynamides in high yields with complete regio- and stereoselectivity to valuable β-boryl-β-alkyl/aryl α-aryl substituted enamides which belong to the class of trisubstituted alkenylboronates. The 1,2-carboboration reaction is experimentally easy to conduct, shows high
介绍了 ynamides 的无催化剂 1,2-碳硼化。容易获得的芳基二氯硼烷与烷基或芳基取代的炔酰胺以高产率反应,对有价值的 β-硼基-β-烷基/芳基 α-芳基取代的烯酰胺具有完全的区域和立体选择性,属于三取代的烯基硼酸酯类。1,2-碳硼化反应在实验上易于进行,显示出高官能团耐受性和广泛的底物范围。克级反应和各种合成转化令人信服地证明了该方法的合成潜力。该反应还可用于获得 1-boraphenalenes,一类掺硼的多环芳烃。