HFIP-catalyzed direct dehydroxydifluoroalkylation of benzylic and allylic alcohols with difluoroenoxysilanes
作者:Jinshan Li、Wenxue Xi、Rong Zhong、Jianguo Yang、Lei Wang、Hanfeng Ding、Zhiming Wang
DOI:10.1039/d0cc06980a
日期:——
difluoroenoxysilanes is developed. This procedure enables the synthesis of a broad range of α,α-difluoroketones, a class of highly valuable intermediates and buildingblocks in medicinal and organic chemistry. Here, we have demonstrated for the first time that HFIP could act as a powerful catalyst for fluorinated carbon–carbonbondformation. The application of this protocol in late-stage dehydroxydifluoroalkylation
A highly efficient Mukaiyama–Mannich reaction of N-Boc isatin ketimines and other active cyclic ketimines using difluoroenol silyl ethers catalyzed by Ph<sub>3</sub>PAuOTf
作者:Jin-Sheng Yu、Jian Zhou
DOI:10.1039/c5ob01895a
日期:——
catalyst for the addition of difluoroenol silylethers to N-Boc isatin ketimines and other two kinds of active cyclic ketimines. This represents the first Au(I)-catalyzed Mukaiyama–Mannich reaction, and the corresponding non-fluorinated enolsilylether proves to be even much more reactive under the same conditions. This method paves the way to the total synthesis of difluoromethylated analogues of AG-041R
Effect of fluorine on palladium-catalyzed cross-coupling reactions of aryl bromides with trifluoromethyl aryl ketones via difluoroenol silyl or monofluoroenol silyl ethers
作者:Yong Guo、Jean'ne M. Shreeve
DOI:10.1039/b705137a
日期:——
Palladium-catalyzed cross-coupling reactions of alpha-aryl-beta,beta-difluoroenol silyl and alpha-aryl-beta-fluoroenol silyl ethers with aryl bromides proceed smoothly with good functional compatibility.
A Highly Efficient Gold(I)-Catalyzed Mukaiyama–Mannich Reaction of α-Amino Sulfones with Fluorinated Silyl Enol Ethers To Give β-Amino α-Fluorinated Ketones
Ph3PAuOTf was identified as a powerful catalyst for the Mukaiyama–Mannich reaction of fluorinated silyl enol ethers with α-amino sulfones. This provides ready access to β-amino α-fluorinated ketones in good to excellent yields.