Reactivity of Stable Trifluoroacetaldehyde Hemiaminals. 1. An Unexpected Reaction with Enolizable Carbonyl Compounds
摘要:
In the presence of enolizable carbonyl compounds, hemiaminals of fluoral and related polyfluoro-aldehydes behave as equivalents of fluoroalkyl iminium compounds and provide beta -polyfluoroalkyl beta -dialkylamino ketones, which are easily transformed, under acidic conditions, into beta -polyfluoroalkylenones.
Synthetic Applications of α-Fluoroalkylated Enones. 1. Use as Dienophiles in Diels−Alder Cycloadditions
作者:Julia Leuger、Gaëlle Blond、Roland Fröhlich、Thierry Billard、Günter Haufe、Bernard R. Langlois
DOI:10.1021/jo052567+
日期:2006.3.31
beta-Fluoroalkylated enones are efficient dienophiles in Diels-Alder cycloadditions to prepare various fluorinated cylic compounds. However, the presence of the fluoroalkyl moiety modifies the reactivity and the selectivity of these cycloadditions.