| abstract |
The present invention provides a method for producing an α, β-unsaturated aldehyde or α, β-unsaturated carboxylic acid with high selectivity. In a liquid phase in which a compound containing phosphorus (excluding phosphomolybdic acid and phosphomolybdate) coexists, at least in the presence of a catalyst containing palladium as a useful component, olefin or α, A method for producing an α, β-unsaturated aldehyde or an α, β-unsaturated carboxylic acid, which oxidizes a β-unsaturated aldehyde. [Selection figure] None |