A Convenient Route to α-Substituted Dialkyl (E)-3-Oxo-1-alkenylphosphonates

Article abstract of DOI:10.1007/BF00798281

α-Substituted dialkyl (E)-β-acylvinylphosphonates 2CO-CH=C(R¹)-P(O)(OR')2, 3>, are easily obtained in good yields by Wittig-reaction of dialkyl acylphosphonates 1 1CO-P(O)(OR')2, R¹= alkyl or aryl> with 2-oxoalkylidene triphenylphosphoranes 2 2CO-CH=PPh3, R²= alkyl, O-alkyl and CH2X (X=Br, OMe, CO2Et)>. - Keywords: Wittig reaction of dialkyl acylphosphonates, with 2-oxo alkylidene triphenylphosphoranes; E-β-acylvinylphosphonates