Palladium-Catalyzed Cascade sp<sup>2</sup>
C−H Functionalization/Intramolecular Asymmetric Allylation: From Aryl Ureas and 1,3-Dienes to Chiral Indolines
作者:Shu-Sen Chen、Min-Song Wu、Zhi-Yong Han
DOI:10.1002/anie.201702745
日期:2017.6.1
functionalization/intramolecular asymmetric allylation reaction is reported. A new chiral sulfoxide–oxazoline (SOX) ligand bearing single chiral center on the sulfur was identified as the optimal ligand for the reaction, being efficient both in the C−H cleavage step and the stereocontrol of the allylation step. The broad scope of this method with respect to aryl ureas and 1,3-dienes enables the rapid construction
报道了手性Pd II催化的级联sp 2 C H功能/分子内不对称烯丙基化反应。一种新的手性亚砜-恶唑啉(SOX)配体在硫上具有一个手性中心,被确定为该反应的最佳配体,在CH裂解步骤和烯丙基化步骤的立体控制方面均十分有效。关于芳基脲和1,3-二烯,该方法的广泛范围使得能够快速构建有价值的手性二氢吲哚衍生物,具有高收率和对映选择性(最高收率99%,最高收率95:5 er)。