The condensation of 4-hydroxy-6-methyl-2H-pyran-2-one (I) with 1-phenyl-1-propanol (II) by means of TsOH in toluene gives 4-hydroxy-6-methyl-3-(1-phenyl-propyl)-2H-pyran-2-one (III), which is alkylated with benzyl bromide and LDA in THF yielding 4-hydroxy-6-(2-phenylethyl)-3-(1-phenylpropyl)-2H-pyran-2-one (V). Finally this compound is submitted to a new alkylation process with ethyl iodide and LDA in THF to afford the target compound.