1: 39 percent / LiN(SiMe3)2 / tetrahydrofuran / -78 °C / 1.) 40 min, 2.) 2 h 2: 50 percent / n-Bu4NF / H2O; tetrahydrofuran / 15 h / Ambient temperature 3: 100 percent / K2CO3 / methanol / 2 h / Ambient temperature View Scheme