1: Methyltriphenylphosphonium bromide With potassium tert-butylate in diethyl ether T=0°C; 0.166667 h; 2: 5-fluoro-2-isopropoxybenzaldehyde in diethyl ether T=0°C; 0.166667 h;

1.1: 72 percent / tetrahydrofuran / 12 h / 60 °C 2.1: 74 percent / LiAlH4 / diethyl ether / 12 h / 24 °C 3.1: 90 percent / manganese dioxide / diethyl ether / 4 h / 24 °C 4.1: KOtBu / diethyl ether / 0.17 h / 0 °C 4.2: 89 percent / diethyl ether / 0.17 h / 0 °C View Scheme

1.1: 90 percent / manganese dioxide / diethyl ether / 4 h / 24 °C 2.1: KOtBu / diethyl ether / 0.17 h / 0 °C 2.2: 89 percent / diethyl ether / 0.17 h / 0 °C View Scheme

1.1: 74 percent / LiAlH4 / diethyl ether / 12 h / 24 °C 2.1: 90 percent / manganese dioxide / diethyl ether / 4 h / 24 °C 3.1: KOtBu / diethyl ether / 0.17 h / 0 °C 3.2: 89 percent / diethyl ether / 0.17 h / 0 °C View Scheme