Exploring the Steric and Electronic Factors Governing the Regio- and Enantioselectivity of the Pd-Catalyzed Decarboxylative Generation and Allylation of 2-Azaallyl Anions
作者:Shuaifei Wang、Xiaoyan Qian、Yuanyu Chang、Jiayue Sun、Xiujing Xing、Wendy F. Ballard、Jason J. Chruma
DOI:10.1021/acs.joc.8b00491
日期:2018.4.6
The impact of the steric and electronic factors in both the para-substituted benzaldimine and 2,2-diarylglycine components on the regioselectivity and enantioselectivity of the palladium-catalyzed decarboxylative allylation of allyl 2,2-diarylglycinate aryl imines was explored. These studies revealed that using 2,2-di(2-methoxyphenyl)glycine as the amino acid linchpin allowed for the exclusive synthesis
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