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The aldol homocondensation of propanal was studied in the presence of a heterogeneous titanium oxide catalyst modifi ed with amino acid (AA) L-norleucine. The eff ects of the temperature and L-norleucine content on the conversion of propanal and selectivity of the process were studied. The reaction products were identifi ed, and possible mechanisms are considered. A new catalyst (5% AA on titanium dioxide) was developed for the synthesis of 2-methyl-2pentenal with the selectivity >90%.

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