Journal of the Chemical Society. Perkin transactions I p. 2127 - 2133 (1981)
Update date:2022-08-05
Topics:
Cooper, Dianne
Trippett, Stuart
α-Hydroxyalk-2-enylphosphonates undergo Claisen orthoester rearrangement on heating with orthoesters, and their arylsulphenates undergo <2,3>-sigmatropic rearrangement to give 3-arylsulphinylalk-1-enylphosphonates.The addition of allyloxide anion to the central carbon of the allene Me2C=C=CHP(O)(OEt)2 is followed by rapid Claisen rearrangement of the resulting allylic carbanion to give the two possible β-ketoalkylphosphonates.Allenic phosphonates of the general formula R1R2C=CH
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