Palladium-Catalyzed Synthesis of 3-Trifluoromethyl-Substituted 1,3-Butadienes by Means of Directed C–H Bond Functionalization
作者:Qun Zhao、Vincent Tognetti、Laurent Joubert、Tatiana Besset、Xavier Pannecoucke、Jean-Philippe Bouillon、Thomas Poisson
DOI:10.1021/acs.orglett.7b00704
日期:2017.4.21
A palladium-catalyzed C–H bond functionalization of acrylamides was developed to build up stereoselectively trifluoromethylated 1,3-butadienes. Using a tertiary amide as a directing group, olefins were selectively functionalized with 2-bromo-3,3,3-trifluoropropene to access these important fluorinated compounds. The methodology was extended to the construction of pentafluoroethyl-substituted 1,3-dienes
开发了钯催化的丙烯酰胺的C–H键官能化反应,以建立立体选择性的三氟甲基化1,3-丁二烯。使用叔酰胺作为导向基团,用2-溴-3,3,3-三氟丙烯将烯烃选择性官能化,从而获得这些重要的氟化化合物。该方法扩展到五氟乙基取代的1,3-二烯的构建。密度泛函理论计算支持的机理研究提出了这种转变的氧化还原中性机理。