作者:Yong Guo、Brendan Twamley、Jean'ne M. Shreeve
DOI:10.1039/b900311h
日期:——
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。