1.1: t-BuOK / tetrahydrofuran / 0.17 h / 20 - 25 °C 1.2: 89 percent / tetrahydrofuran / 0.5 h / 20 - 25 °C 2.1: 94 percent / MeSNa / acetonitrile / 1 h / 20 - 25 °C 3.1: 100 percent / aq. KOH / acetone / 2 h / Heating View Scheme