1: 60percent sodium hydride in mineral oil / dimethylformamide; hexane / 12 h / 0 - 21 °C 2: 87 percent / 40percent tetraethylammonium hydroxide / H2O / 0.5 h / 70 - 80 °C View Scheme

sodium hydride in hexane; N,N-dimethyl-formamide T=0 - 21°C; 12 h;