| 摘要 |
O.Z. 0050/43172 A process for preparing 3 (hydroxyphenyl)propionaldehydes of the formula I (I) and, where appropriate, for preparing 3-(hydroxyphenyl)-propanols of the formula II (II) where R1, R2, R3 and R4 are each hydrogen , C1-C20-alkyl , C3-C20-cycloalkyl, C4-C20-alkylcyclo-alkyl, C4-C20 cycloalkylalkyl or C5-C20-alkylcycloalkylalkyl, R3 and R4 are each aryl, C7-C20-aralkyl, hetero cycloalkyl or C3-C20-heterocycloalkyl-alkyl, entails a) reacting phenols of the formula III (III) where R1 and R2 have the abovementioned O.Z. 0050/43172 meanings, with 3-hydroxypropionaldehydes of the formula IV (IV) where R3 and R4 have the abovementioned meanings, in the presence of a basic catalyst at from 90 to 230.degree.C and under from 0.01 to 50 bar and, where appropriate, b) treating the resulting 3-(hydroxyphenyl)pro- pionaldehydes of the formula I (I) where R1, R2, R3 and R4 have the abovementioned meanings, with hydrogen in the presence of a hydrogenation catalyst at from 0 to 250.degree.C and under from 0.1 to 300 bar.
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