This invention relates to a process for preparing (±)-2-exo-(2-Methylbenzyloxy)-1-methyl-4-iso-propyl-7-oxabicyclo[2.2.1]heptane of the formula (I) any of its individual enantiomers or any non-racemic mixture thereof, comprising the step of reacting (±)-2-exo-hydroxy-1-methyl-4-isopropyl-7-oxabicyclo[2.2.1]heptane of the formula (II) any of its individual enantiomers or any non-racemic mixture thereof with a 2-Methylbenzyl compound of the formula (III) wherein X is a leaving group, in the presence of at least one base, at least one catalyst selected from rubidium salts, cesium salts and any combination thereof and at least one inert organic solvent S1.