α-(Methoxycarbonyl)benzylidene quasi-phosphonium ylides, which are unreactive toward most carbonyl compounds, are found to undergo the Wittig reaction upon irradiation; irradiation with acyclic carbonyl compounds, e.g. benzaldehydes and acetophenones, afford the corresponding alkenes, whereas the reaction with cyclohexanone affords 1-phenyl-1-(methoxycarbonyl)hepta-1, 2-diene.
H. Tomioka, N. Ichikawa and H. Murata, J. Chem. Soc., Chem. Commun., 1992, 193 DOI: 10.1039/C39920000193
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