Nickel-Catalyzed Decarboxylative Generation and Asymmetric Allylation of 2-Azaallyl Anions
作者:Chenlu Liu、Changfeng Deng、Han Yang、Xiaoyan Qian、Shaojian Tang、Michal Poznik、Jason J. Chruma
DOI:10.1021/acs.joc.9b01293
日期:2019.8.16
The first nickel-catalyzed asymmetric decarboxylative allylation (DcA) of allyl 2,2-diarylglycinate imines is reported. This transformation utilizes a chiral ferrocenyl bidentate ligand and a Ni(0) precatalyst to mediate the decarboxylative generation and asymmetric allylation of 2-azaallyl anions, affording α-aryl homoallylic imines in modest-to-high yields and moderate-to-high enantiomeric ratios
报道了2,2-二芳基甘氨酸烯丙基烯丙基亚胺的第一个镍催化的不对称脱羧烯丙基化(DcA)。此转化利用手性二茂铁二齿双齿配体和Ni(0)预催化剂介导2-氮杂烯丙基阴离子的脱羧生成和不对称烯丙基化,以中等至高收率和中等至高对映体比率提供α-芳基均烯丙基亚胺。 。与我们先前报道的类似的Pd介导的实验方案相比,所产生的Ni催化的转化过程被证明不那么普遍,但是就C–C键形成的区域和对映选择性而言,它仍然表现出一定的优势。