potassium tert-butylate in N,N-dimethyl-formamide T=85°C;

Multi-step reaction with 3 steps 1: di-isopropylamine, BuLi / tetrahydrofuran; hexane / 1.) -78 deg C, 1 h; 2.) room temp. 1 h2: 78 percent / tetrahydrofuran / 1.) -78 deg C, 1 h; 2.) room temp. 6 h3: 5M HCl / tetrahydrofuran / 3 h / Ambient temperature  

T=200°C; 0.5 h;