Pd-catalyzed arylation of silyl enol ethers of substituted α-fluoroketones
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
Impact of Silyl Enol Ether Stability on Palladium-Catalyzed Arylations
作者:Yong Guo、Guo-Hong Tao、Alex Blumenfeld、Jean’ne M. Shreeve
DOI:10.1021/om1000259
日期:2010.4.12
The effect of stability on arylation of silyl enolethers as dictated by the presence of bulky silyl groups was elucidated through experiment and calculation. With the enhancement of stability of the silyl enolethers, especially of acyclic ethers, the efficiency of palladium-catalyzed arylation of silyl enolates based on ketone precursors was greatly increased.