4-Methoxyalka-2,4-dienoates, bearing a variety of substituents, have been conveniently prepared in a one-pot, double quenching reaction of ylides derived from α-methoxyallyl(diphenyl)phosphine oxides. The dienes are useful precursors of γ-keto-α,β-unsaturated esters.
E. F. Birse, M. D. Ironside, L. McQuire and A. W. Murray, J. Chem. Soc., Perkin Trans. 1, 1990, 2811 DOI: 10.1039/P19900002811
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