Pd(II)-Catalyzed Asymmetric Oxidative 1,2-Diamination of Conjugated Dienes with Ureas
作者:Min-Song Wu、Tao Fan、Shu-Sen Chen、Zhi-Yong Han、Liu-Zhu Gong
DOI:10.1021/acs.orglett.8b00870
日期:2018.4.20
A palladium(II)-catalyzed asymmetric 1,2-diamination of 1,3-dienes with readily available dialkylureas was established by using a chiral pyridine–oxazoline ligand. The diamination reaction exclusively occurs at the terminal C–C double bond of the 1,3-dienes to give 4-vinylimidazolidin-2-ones in high yields and with excellent levels of enantioselectivity (up to 99% yield, 97% ee). The reaction could
通过使用手性吡啶-恶唑啉配体,建立了钯(II)催化的1,3-二烯与1,2-二烯的不对称1,2-氨基化反应。氨化反应只发生在1,3-二烯的末端C-C双键上,从而以高收率和极好的对映选择性(最高99%收率,97%ee)产生4-乙烯基咪唑啉酮-2-酮。该反应可以可行地用于克比级合成,其中二烯和脲的比例为1:1。