Pd-Catalyzed α-Arylation of α,α-Difluoroketones with Aryl Bromides and Chlorides. A Route to Difluoromethylarenes
作者:Shaozhong Ge、Wojciech Chaładaj、John F. Hartwig
DOI:10.1021/ja501117v
日期:2014.3.19
α-difluoroketones with aryl and heteroaryl bromides and chlorides catalyzed by an air- and moisture-stable palladacyclic complex containing P(t-Bu)Cy2 as ligand. The combination of this Pd-catalyzed arylation and base-induced cleavage of the acyl–aryl C–C bond within the α-aryl-α,α-difluoroketone constitutes a one-pot, two-step procedure to synthesize difluoromethylarenes from aryl halides. A broad range
我们报告了 Pd 催化的 α,α-二氟酮与芳基和杂芳基溴化物和氯化物的 α-芳基化反应,该反应由含有 P(t-Bu)Cy2 作为配体的空气和水分稳定的钯环络合物催化。这种 Pd 催化的芳基化和碱诱导的 α-芳基-α,α-二氟酮内酰基-芳基 C-C 键断裂的组合构成了从芳基卤化物合成二氟甲基芳烃的一锅两步法。广泛的电子变化芳基和杂芳基溴化物和氯化物经历了这两种转化,以高产率提供了 α-芳基-α,α-二氟酮、二氟甲基芳烃和二氟甲基杂芳烃。