1: 60 percent / NaN(SiMe3)2 / tetrahydrofuran / 1.) room temperature, 1 h, 2.) -90 deg C 2: 93 percent / LiOH / tetrahydrofuran; H2O View Scheme

sodium hexamethyldisilazane in tetrahydrofuran 1.) room temperature, 1 h, 2.) -90 deg C;