C–H Functionalization at Sterically Congested Positions by the Platinum-Catalyzed Borylation of Arenes
作者:Takayuki Furukawa、Mamoru Tobisu、Naoto Chatani
DOI:10.1021/jacs.5b07677
日期:2015.9.30
Despite significant progress in the area of C-H bond functionalization of arenes, no general method has been reported for the functionalization of C-H bonds at the sterically encumbered positions of simple arenes, such as mesitylene. Herein, we report the development of the first platinum-based catalyst for C-H borylation of arenes and heteroarenes. Notably, this method exhibited high tolerance toward steric hindrance and provided rapid access to a series of 2,6-disubstituted phenylboronic esters, valuable building blocks for further elaborations.
C–H Borylation by Platinum Catalysis
作者:Takayuki Furukawa、Mamoru Tobisu、Naoto Chatani
DOI:10.1246/bcsj.20160391
日期:2017.3.15
platinum-catalyzed borylation of aromatic C–H bonds. N-Heterocyclic carbene-ligated platinum catalysts are found to be efficient catalysts for the borylation of aromatic C(sp2)–H bonds when bis(pinacolato)diboron is used as the boron source. The most remarkable feature of these Pt catalysts is their lack of sensitivity towards the degree of steric hindrance around the C–H bonds undergoing the borylation reaction