Palladium-Catalyzed Direct Ethynylation of C(sp<sup>3</sup>)–H Bonds in Aliphatic Carboxylic Acid Derivatives
作者:Yusuke Ano、Mamoru Tobisu、Naoto Chatani
DOI:10.1021/ja206002m
日期:2011.8.24
The first catalytic alkynylation of unactivatedC(sp(3))-H bonds has been accomplished. The method allows for the straightforward introduction of an ethynyl group into aliphatic acid derivatives under palladium catalysis. This new reaction can be applied to the rapid elaboration of complex aliphatic acids, for example, via azide/alkyne cycloaddition.
Palladium-Catalyzed Asymmetric Arylation of C(sp<sup>3</sup>)–H Bonds of Aliphatic Amides: Controlling Enantioselectivity Using Chiral Phosphoric Amides/Acids
作者:Shao-Bai Yan、Song Zhang、Wei-Liang Duan
DOI:10.1021/acs.orglett.5b00968
日期:2015.5.15
Enantioselective arylation of secondary beta-C(sp(3))-H bonds of 8-aminoquinoline amides was realized with a palladium catalyst. Chiral phosphoric amides and acids were used for the first time to control the stereoselectivity at the C-H bond cleavage step in the C-H activation reactions.