1: 16percent H2SO4 / ethanol / 1 h / 50 °C 2: 95 percent / LiAlH4 / bis-(2-methoxy-ethyl) ether / 48 h / 140 °C 3: 7.3 g / pyridine / diethyl ether View Scheme

1: 16percent H2SO4 / ethanol / 1 h / 50 °C 2: 95 percent / LiAlH4 / bis-(2-methoxy-ethyl) ether / 48 h / 140 °C View Scheme

toluene-4-sulfonic acid in methanol 2 h;