I. A solution of the amine in ethylene dichloride, maintained at -lo”, was treated with the acid bromide. After filtering off the precipitated amine hydrobromide, the filtrate was washed with dilute hydrochloric acid, dried and distilled. When distillation was impracticable the compounds were recrystallized from aqueous ethanol after the ethylene dichloride had been removed. Since the first members of the series were somewhat soluble in water, the filtrates were not washed ...
