| 摘要 |
A process for producing alpha,beta-unsaturated ketones represented by the following general formula <IMAGE> (II) wherein R1 represents a hydrocarbon radical, R2 represents an organic radical bonded through a carbon-carbon bond, R3 and R4 represent a hydrogen atom or a hydrocarbon radical, and R1, R2, R3 and R4 may be straight-chained or form a ring in arbitrary combinations, which comprises contacting an alpha-disubstituted-beta-keto acid ester represented by the general formula <IMAGE> (I) wherein R1, R2, R3 and R4 are as defined, and R5, R6, R7 and R8 represent a hydrogen atom or a hydrocarbon radical, with a catalyst consisting essentially of (a) a compound of a platinum-group metal and optionally (b) a monodentate ligand (b).
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