Lewis acid promoted aldol reaction of fluorinated silyl enol ethers from new fluoroacetylsilane derivatives
作者:Woo Jin Chung、Silvana C. Ngo、Seiichiro Higashiya、John T. Welch
DOI:10.1016/j.tetlet.2004.05.055
日期:2004.7
Newfluorinated silyl enol ethers with various trialkylsilyl groups were synthesized. Various fluorinated β-hydroxy ketones were synthesized by Lewisacid promoted aldol reaction of silyl enol ethers with diverse aldehydes. Reactivity of various trialkylsilyloxy groups toward Lewisacid was also studied.
Synthesis of Mono- and Difluoroacetyltrialkylsilanes and the Corresponding Enol Silyl Ethers
作者:Seiichiro Higashiya、Woo Jin Chung、Dong Sung Lim、Silvana C. Ngo、Kelly、Paul J. Toscano、John T. Welch
DOI:10.1021/jo049551o
日期:2004.9.1
A variety of mono- and difluoroacetylsilanes and the corresponding silyl enolethers were prepared from trifluoroethanol and chlorotrialkylsilanes in the presence of LDA through retro-Brook rearrangement. Sterically demanding silyl groups, especially those bound to oxygen, resulted in higher yields of difluoroacetylsilanes. The yields of difluoroacetylsilanes were also dramatically affected by the
Trifluoroacetyltriphenylsilane as a potentially useful fluorine-containing building block. Preparation and its transformation into 2,2-difluoro enol silyl ethers
作者:Fugiang Jin、Biao Jiang、Yuanyao Xu
DOI:10.1016/s0040-4039(00)91901-4
日期:1992.2
The first example of perfluoroacylsilanes-trifluoroacetyltriphenylsilane was prepared in good yield and it has been converted into a series of 2,2-difluoro enol silyl ethers in almost quantitative yields by treatment with various organolithiums.