1.1: 81 percent / K2CO3 / methanol / 1 h / 20 °C 2.1: 81 percent / imidazole; I2; PPh3 / tetrahydrofuran; diethyl ether / 3 h / 0 - 20 °C 3.1: NaH / tetrahydrofuran / 0 °C 3.2: 62 percent / tetrahydrofuran; dimethylformamide / 2 h / 20 °C View Scheme