1: 96 percent / ethanol; CHCl3; diethyl ether / 1 h / 0 °C 2: 88 percent / NaOMe / methanol; CHCl3 / 71 h / Ambient temperature 3: 91 percent / LiAlH4 / tetrahydrofuran; diethyl ether / 22 h / Heating View Scheme

1: 96 percent / ethanol; CHCl3; diethyl ether / 1 h / 0 °C 2: 1.) LiAlH4, 2.) NaBH4 / 1.) THF, Et2O, reflux, 3 h, 2.) MeOH, overnight View Scheme

1: 96 percent / ethanol; CHCl3; diethyl ether / 1 h / 0 °C 2: 1.) LiAlH4, 2.) NaBH4 / 1.) THF, Et2O, reflux, 3 h, 2.) MeOH, overnight 3: pyridine / 3 h / Ambient temperature 4: LiAlH4 / tetrahydrofuran; diethyl ether / 3 h / Heating View Scheme