1: 87.6 percent / NH2NH2*H2O (80 percent), KOH / bis-(2-hydroxy-ethyl) ether / 1.) 110 deg C, 1 h; 2.) 180 deg C, 17 h 2: 1.) Br2; 2.) NaOH, Br2 / 1.) pH 6-7, room temp., 62 h; 2.) room temp., 24 h View Scheme