potassium carbonate in N,N-dimethyl-formamide T=100°C;

1.1: 91 percent / LiAlH4 / diethyl ether 2.1: 79 percent / PCl5 / 1 h / 100 °C 3.1: 63 percent / toluene / 16 h / 110 °C 4.1: NaOMe / methanol / 3 h / 60 °C 4.2: 50 percent / methanol / Heating View Scheme