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2005
Organo-silicon compounds
S 0060
Synthesis of Mono- and Difluoroacetyltrialkylsilanes and the Corresponding Enol
Ethers. — The title compounds are prepared from trifluoroethanol and a variety
04- 179 Silyl
of chlorosilanes (Tes, Tips, SiPh2tBu, Tbs, Tms, SiPh3) in the presence of LDA through
retro-Brook rearrangement. For several silyl chlorides, the presence of HMPA leads to
better yields. By varying the workup conditions, either fluoroacetyl or enol silyl ethers
are obtained. — (HIGASHIYA, S.; CHUNG, W. J.; LIM, D. S.; NGO, S. C.; KELLY,
W. H. I.; TOSCANO, P. J.; WELCH*, J. T.; J. Org. Chem. 69 (2004) 19, 6323-6328;
Dep. Chem., Univ. Albany, Albany, NY 12222, USA; Eng.) — Klein
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