| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an aldehyde in good yield and selectivity. SOLUTION: This method for producing an aldehyde represented by a formula (I) [R1, R2 and R3 are each hydrogen, a 1-6C alkyl, a 3-8C cycloalkyl, an aryl, a 7-12C alkylphenyl or a 7-12C phenylalkyl and R1 and R2 together may form a 3- to 7-membered alicyclic ring and R1 and R3 may each be a 1-4C alkoxy, phenoxy, methylamino, dimethylamino or halogen and R1 may be hydroxy or amino] comprises reacting a carboxylic acid (ester) represented by a formula (II) [R1, R2 and R3 are mentioned above; R4 is hydrogen, a 1-6C alkyl, a 3-8C cycloalkyl, aryl, a 7-12C alkylphenyl or a 7-12C phenylalkyl] with hydrogen in the presence of a lanthanum (III) oxide catalyst in vapor phase.
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