Lithiated Allyl N,N-Dialkylcarbamates as Homoenolate Equivalents; Synthesis of Protected 4-Oxoalkanoates


  • Metalated Nitrogen Derivatives of Carbonic Acid in Organic Synthesis, Part 18.—Part 17: D. Hoppe, R. Follmann, Liebigs Ann. Chem., in press.


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New homoenolate equivalents are now also accessible from substituted allyloxy derivatives (1) by direct metalation; the device employed is acidification of the γ-protons by the protecting group.