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.
Azaborininones: Synthesis and Structural Analysis of a Carbonyl-Containing Class of Azaborines
作者:Geraint H. M. Davies、Asma Mukhtar、Borna Saeednia、Fatemeh Sherafat、Christopher B. Kelly、Gary A. Molander
DOI:10.1021/acs.joc.7b00747
日期:2017.5.19
boronic acids is described. An inexpensive, common reagent, SiO2, was found to serve as both a fluorophile and desiccant to facilitate the annulation process across three different azaborininone platforms. Computational analysis of some of the cores synthesized in this study was undertaken to compare the azaborininones with the analogous carbon-based heterocyclic systems. Computationally derived pKa values
Anthranilamide: A Simple, Removable <i>ortho</i>-Directing Modifier for Arylboronic Acids Serving also as a Protecting Group in Cross-Coupling Reactions
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.