Potassium Carbonate → 2-methyl-2-[N-(3,4-methylenedioxybenzyl)-N-methylamino]propanol

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Reaction Steps

A mixture of 2-methyl-2-methylaminopropanol (1.5 g), 3,4-methylenedioxybenzyl chloride (2.5 g) and potassium carbonate (2 g) in acetonitrile (50 ml) was heated under reflux for 4 hours and evaporated. The residue was partitioned between ether and 2M hydrochloric acid and the acidic layer was washed with methylene chloride, basified with 10% aqueous sodium carbonate solution and extracted into methylene chloride. The organic extract was dried over magnesium sulphate and evaporated to give essentially pure 2-methyl-2-[N-(3,4-methylenedioxybenzyl)-N-methylamino]propanol as a yellow oil (2.0 g, 58%) which was used directly in Example 34. A small portion of this product was dissolved in ether and the solution was treated with excess saturated ethereal hydrogen chloride and evaporated. The residue was triturated with acetone/ethyl acetate to give the title compound as a colourless solid, m.p. 157°-159°.

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