boron trifluoride diethyl etherate in benzene 18 h; Ambient temperature;

With  potassium hydroxide; hydrazine hydrate in  diethylene glycol  1.) reflux 1 h, 2.) remove water and excess hydrazine by distillation, reflux 3 h;   

Multi-step reaction with 2 steps 1: 80 percent / Jones' reagent / acetone / 2 h / Ambient temperature2: 55 percent / hydrazine hydrate, potassium hydroxide / bis-(2-hydroxy-ethyl) ether / 1.) reflux 1 h, 2.) remove water and excess hydrazine by distillation, reflux 3 h  

Multi-step reaction with 4 steps 1: 79 percent / 32percent HBr / acetic acid / 18 h / Ambient temperature2: 65 percent / silver perchlorate, water / acetone / 18 h / Ambient temperature3: 80 percent / Jones' reagent / acetone / 2 h / Ambient temperature4: 55 percent / hydrazine hydrate, potassium hydroxide / bis-(2-hydroxy-ethyl) ether / 1.) reflux 1 h, 2.) remove water and excess hydrazine by distillation, reflux 3 h