1.45 g (5 mmol) of 2-dipropylamino-8-(2-aminoethoxy)-1,2,3,4-tetrahydronaphthalene and 1.38 g (10 mmol) of potassium carbonate were initially introduced into 20 ml of toluene. 0.63 g (5.5 mmol) of methanesulphonyl chloride was then added dropwise, and the mixture was subsequently stirred for 3 h at room temperature. The mixture was then filtered and evaporated. The residue obtained was stirred with petroleum ether and filtered off under suction. The product, obtained by chromatography over silica gel 60, 40-63 μm, using diisopropyl ether/ethanol, 3:2, was recrystallized from petroleum ether with activated charcoal.
