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
我们描述了 4,6,6-三甲基-1,3,2-二氧硼烷(MethylPentaneDiolBorane,MPBH)的方便制备,并证明它是 [PdCl2(PPh3)2]-催化芳基溴化物和碘化物。在氟化铯存在下,相应的硼酸酯会发生快速的 Suzuki 偶联反应。因此,对于 Pd 催化的硼化和交叉偶联反应,MPBH 是频哪醇硼烷的绝佳替代品。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)