Nickel-Catalyzed C–O Bond-Cleaving Alkylation of Esters: Direct Replacement of the Ester Moiety by Functionalized Alkyl Chains
作者:Xiangqian Liu、Jiaqi Jia、Magnus Rueping
DOI:10.1021/acscatal.7b00941
日期:2017.7.7
Two efficient protocols for the nickel-catalyzed aryl–alkyl cross-coupling reactions using esters as coupling components have been established. The methods enable the selective oxidative addition of nickel to acyl C–O and aryl C–O bonds and allow the aryl–alkyl cross-coupling via decarbonylative bond cleavage or through cleavage of a C–O bond with high efficiency and good functional group compatibility
Copper-Catalyzed Trifluoromethylation of Terminal Alkenes through Allylic C–H Bond Activation
作者:Jun Xu、Yao Fu、Dong-Fen Luo、Yuan-Ye Jiang、Bin Xiao、Zhao-Jing Liu、Tian-Jun Gong、Lei Liu
DOI:10.1021/ja206330m
日期:2011.10.5
An unprecedented type of reaction for Cu-catalyzed trifluoromethylation of terminal alkenes is reported. This reaction represents a rare instance of catalytic trifluoromethylation through C(sp(3))-H activation. It also provides a mechanistically unique example of Cu-catalyzed allylic C-H activation/functionalization. Both experimental and theoretical analyses indicate that the trifluoromethylation
报道了一种前所未有的铜催化末端烯烃三氟甲基化反应类型。该反应代表了通过 C(sp(3))-H 活化的催化三氟甲基化的罕见实例。它还提供了 Cu 催化的烯丙基 CH 活化/功能化在机械上独特的例子。实验和理论分析都表明三氟甲基化可能通过类 Heck 的四元环过渡态发生。