A solution of a-bromo-4-methoxyacetophenone in acetonitrile was added to a solution of dimethylamine (8 M solution in ethanol) in acetonitrile at 0°. The solution was stirred at 0° for 5 min. Ether was added and the resulting precipitate after drying, was dissolved in ether and 1 M hydrogen chloride in ether was added at 0°.
