α-Fluorocarbonyl compounds by isomerization of 2-fluorooxiranes
作者:D. Michel、M. Schlosser
DOI:10.1016/0040-4020(95)01092-0
日期:1996.2
2-Fluorooxiranes 2 can be isolated after peracid oxidation of fluoroalkenes 1. When treated with the triethylamine hydrogen fluoride adduct, the intermediates 2 isomerize to afford α-fluorinated carbonyl compounds 3.
(Ï-1)-Fluoroalk-(Ï-1)-enoic acids of chain lengths varying between C5 and C15 have been prepared by consecutive bromofluorination and dehydrobromination of either alk-(Ï-1)-enoic acids or alk-(Ï-1)-enyl acetates, in the latter case followed by oxidation. The halogen was found to increase the antimycotic properties of the unsaturated fatty acids, 10-fluoroundec-10-enoic acid exhibiting a particularly strong fungicidal activity.
Terminal and non-terminal vinyl fluorides have been hydroxylated regioselectively in the allylic position adjacent to the fluorine bearing carbon using selenium dioxide and tert-butyl hydroperoxide.