69065-31-2Relevant articles and documents
Preparation of γ, δ-unsaturated ketones by the carroll reaction in cyclic carbonates or γ-lactones
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, (2008/06/13)
A process for preparing γ,δ-unsaturated ketones by a) reacting vinylcarbinols or propargyl alcohols with alkyl acetoacetates or diketene and b) thermally rearranging the resulting acetoacetates in the presence or absence of an aluminum catalyst to γ,δ-unsaturated ketones (Carroll reaction), wherein step a) and/or step b) is carried out in a cyclic carbonate of the formula I or a γ-lactone of the formula II STR1 where R1, R2 and R3 are H, or lower alkyl and R4 is H, lower alkyl, phenyl or methoxymethyl, as solvent.
