potassium tert-butylate 1.) ethanol, 70 deg C; Multistep reaction;

1: With potassium hydroxide; ethanol T=40°C; 3 h; Heating / reflux; 2: With hydrogenchloride in ethanol; water 3: With sulfuric acid in water T=0 - 20°C; pH=1; 0.333333 h;