the Pd-catalyzed cross-coupling of aryl bromides with either α-fluoroketones or their corresponding silyl enol ethers. The direct arylation with an α-fluoroketone requires a strong base, such as potassium tert-butoxide, and under these conditions the presence of a base-sensitive functional group is not compatible. However, good functional tolerance was achieved when the anionic coupling moieties were
α-
氟-α-芳基酮是通过Pd催化的芳基
溴化物与α-
氟酮或其相应的甲
硅烷基烯醇醚的交叉偶联而合成的。与α-
氟代酮的直接芳基化反应需要强碱,例如
钾叔丁醇,并且在这些条件下,碱敏感性官能团的存在是不相容的。然而,当由α-
氟代酮与四丁基
铵(三苯基甲
硅烷基)二
氟硅酸盐(TBAT)在几乎中性的条件下反应而获得的甲
硅烷基烯醇醚产生阴离子偶联部分时,可获得良好的功能耐受性。使用具有碳甲氧基,硝基,
氰基或羰基的芳基卤化物。与非
氟化甲
硅烷基烯醇醚的反应1h以低收率得到了交叉偶联产物。