potassium hydroxide; bromine in 1,4-dioxane; water 1 h; Ambient temperature;

1: 63 percent / K2CO3 / acetone / 20 h / Heating 2: 97 percent / KOH, Br2 / H2O; dioxane / 1 h / Ambient temperature View Scheme

hydroxylamine hydrochloride; ethylamine; copper(l) chloride 1.) H2O, N,N-dimethylacetamide, 2.) H2O, N,N-dimethylacetamide, 30 deg C, 1 h; Yield given. Multistep reaction;