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2005
Oxirane derivatives
R 0030
Preparation and Regioselective SN2' Reaction of Novel gem-Difluorinated
with RLi. — Treatment of epoxy ketones of type (I) with
11- 119 Vinyloxiranes
CF2Br 2/HMPA offers a novel route to difluorinated vinyloxiranes. They react regiospecifically with RLi to afford difluorinated allylic alcohols with good to high (E)
selectivity which can be improved by addition of HMPA. The products are of synthetic
and biological interest. — (UEKI, H.; CHIBA, T.; YAMAZAKI*, T.; KITAZUME, T.;
J. Org. Chem. 69 (2004) 22, 7616-7627; Grad. Sch. Biosci. Biotechnol., Tokyo Inst.
Technol., Midori, Yokohama 226, Japan; Eng.) — Jannicke
2005
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