1: 51 percent / LiTi(Oi-Pr)4(SPh) / tetrahydrofuran; hexane / 72 h / Ambient temperature 2: 85 percent / potassium trimethylsilanolate / CH2Cl2 / Ambient temperature 3: Et3N / N,N-dimethyl-acetamide / 3 h / Ambient temperature 4: Et3N / 24 h / Ambient temperature View Scheme