In the same way as in the case of 2-(4-n-dodecyloxyphenoxy)-butyric acid all of the methanol was distilled off from a mixture of 89 g (0.468 mole) of 1,1,3,3-tetramethyl-5-indanol, 750 ml of anhydrous toluene, and 86.7 ml (0.468 mole) of a 30% solution of sodium methanolate in methanol. 93.2 g (0.515 mole) of α-bromobutyric acid methyl ester were added to the suspension of the resulting sodium salt of 1,1,3,3-tetramethyl-5-indanol. The mixture was refluxed for 7 hours. 180 ml of isopropanol and 140 ml of 5 N sodium hydroxide were added to the hot (80° C.) mixture and refluxing was then continued for 1 hour. The mixture was cooled down to room temperature and admixed with 164 ml of 5 N hydrochloric acid. The toluene layer was decanted. The residue was dried and the solvent was evaporated.
