Acetic acid, 2-(triphenylphosphoranylidene)-, ethyl ester → Ethyl 2-(oxan-4-ylidene)acetate

Participants

Reaction Conditions

Reaction Steps

To a solution of tetrahydro-4H-pyran-4-one (5.0 g, 50 mmol) in 150 mL toluene at ambient temperature was added carbethoxymethylenetriphenyl phosphorane (17.4 g, 50 mmoL.). The mixture was warmed to 50° C. and allowed to stir for 16 h. The mixture was cooled to ambient temperature, concentrated under reduced pressure and purified by column chromatography (Si2O, 50% hexanes in EtOAc) to provide the title compound (2.2 g, 13 mmol, 26% yield). MS (DCI/NH3) m/z 171 (M+H)+.

Provenance & Evidence