An Efficient Approach to Original
Substituted 2-Arylidene-2H-[1,4]-oxazin-3(4H)-ones via a Tandem Intramolecular P(O→C)
Migration/Horner-Wadsworth-Emmons
Olefination Sequence
An Efficient Approach to Original
Substituted 2-Arylidene-2<i>H</i>-[1,4]-oxazin-3(4<i>H</i>)-ones via a Tandem Intramolecular P(O→C)
Migration/Horner-Wadsworth-Emmons
Olefination Sequence
A useful tool for the synthesis of 2-arylidene-2H-[1,4]-oxazin-3(4H)-one derivatives is described. Starting from bisvinylphosphate intermediate, the key step is an intramolecular P(O→C) migration combined with a Horner-Wadsworth-Emmons olefination as a one-pot procedure.