tetrabutyl ammonium fluoride in tetrahydrofuran T=20°C; 0.5 h;

1.1: NaH / tetrahydrofuran / 0.17 h / 20 °C 1.2: 95 percent / tetrahydrofuran / 3 h / 20 °C 2.1: 96 percent / tetrabutylammonium fluoride / tetrahydrofuran / 0.5 h / 20 °C View Scheme