| 摘要 |
A process for the preparation of aldehydes of the general formula I <IMAGE> (I) in which R1, R2 denote hydrogen, C1-C12 alkyl, C3-C8 cycloalkyl, acyl, aryl, or C7-C20 aralkyl or together stand for -(CH2)n-X-(CH2)m-, X denotes methylene, oxygen, sulfur, NH or NR3 and n, m stand for an integer from 0 bis 8, wherein a geminal formyl ester of the general formula II <IMAGE> (II) in which R1 and R2 have the aforementioned meanings and R3 denotes C1-C12 alkyl, is caused to react in the presence of an acid catalyst at temperatures ranging from 150 DEG to 400 DEG C.
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