Ruthenium-catalyzed C–H Silylation of Methylboronic Acid Using a Removable α-Directing Modifier on the Boron Atom
作者:Hideki Ihara、Akinori Ueda、Michinori Suginome
DOI:10.1246/cl.2011.916
日期:2011.9.5
Ruthenium-catalyzed C–H silylation of methylboronic acid was achieved by use of 2-(1H-pyrazol-3-yl)aniline as a removable α-directing modifier on the boron atom. Cross-coupling of the product, i.e., (phenyldimethylsilyl)methylpinacolborane, with aryl halides proceeded in the presence of a [PdCl2(dppf)] catalyst and CsOH as a base.
使用2-(1H-吡唑-3-基)苯胺作为可去除的α-定向修饰剂,实现了锆催化的甲基硼酸C–H硅化反应。产物,即(苯基二甲硅基)甲基匹那酮硼烷与芳基卤化物的交叉偶联反应在[PdCl2(dppf)]催化剂和氢氧化铯作为碱的存在下进行。