Anthranilamide: A Simple, Removable ortho-Directing Modifier for Arylboronic Acids Serving also as a Protecting Group in Cross-Coupling Reactions
摘要:
Anthranilamide (AAM) serves as a bifunctional modifier on the boron atom in catalytic transformations of arylboronic acids. It makes boronyl groups unreactive in Suzuki-Miyaura coupling and promotes Ru-catalyzed ortho-silylation. Suzuki-Miyaura coupling of AAM-modified bromophenylboronic acids with tolylboronic acid gave 1,1'-biaryl-4-boronic acid bearing AAM on the boron atom, which subsequently underwent Ru-catalyzed ortho-silylation at the 3-position by virtue of the ortho-directing effect of the AAM group.
An efficient Ni/Pdcatalyzedchemoselective synthesis of 1,3,2‐benzodiazaborininones from boronic acids and anthranilamide has been developed. This protocol allows for the rapid and straightforward access to a wide range of 1,3,2‐benzodiazaborininones at roomtemperature with excellent functional group tolerance.
Electrochemical Synthesis of Azaborininones under Metal‐Catalyst‐Free Mild Conditions
作者:Dongwen Zeng、Lizhu Zhang、Wei Wang、Ganpeng Li、Xiao‐Jing Zhao、Yonghui He
DOI:10.1002/ejoc.202200679
日期:2022.7.27
efficient electrochemical reaction. Various 1,3,2-benzodiazaborininones were obtained in moderate to excellent yields. Notably, this method features free-oxidants, open-air and eco-friendly reaction conditions.