Synthesis of masked haloareneboronic acids via iridium-catalyzed aromatic C–H borylation with 1,8-naphthalenediaminatoborane (danBH)
作者:Noriyuki Iwadate、Michinori Suginome
DOI:10.1016/j.jorganchem.2008.11.068
日期:2009.5
"Masked" areneboronic acids have been prepared by Ir-catalyzed C-H borylation of arenes. A [Ir(OMe)(cod)](2) complex with a DPPE ligand showed the highest catalytic activity in the C-H borylation of benzene at 80 degrees C. The reaction system can be applied to substituted arenes, including halogen-substituted arenes. 1,3-Dihalobenzenes undergo the C-H borylation at their 5-positions in a regioselective fashion, affording 3,5-dihaloareneboronic acid derivatives, which serve as useful coupling modules for the convergent dendrimer synthesis. (C) 2008 Elsevier B.V. All rights reserved.