Improved Preparation of 4,6,6-Trimethyl-1,3,2-dioxaborinane and Its Use in a Simple [PdCl<sub>2</sub>(TPP)<sub>2</sub>]-Catalyzed Borylation of Aryl Bromides and Iodides
作者:Nageswaran PraveenGanesh、Pierre Yves Chavant
DOI:10.1002/ejoc.200800526
日期:2008.9
We describe a convenient preparation of 4,6,6-trimethyl-1,3,2-dioxaborinane (MethylPentaneDiolBorane, MPBH) and demonstrate that it is an excellent reagent for the [PdCl2(PPh3)2]-catalyzed borylation of aryl bromides and iodides. The corresponding boronic esters undergo rapid Suzuki coupling reactions in the presence of cesium fluoride. Thus, MPBH is an excellent alternative to pinacolborane for Pd-catalyzed