1: 93 percent / 20 percent DIBAH / tetrahydrofuran; toluene / 2.5 h / -60 - -55 °C 2: 73 percent / conc. HCl / methanol; H2O / 0.17 h / Heating View Scheme

1: 87 percent / 20 percent DIBAH / tetrahydrofuran; toluene / 2.5 h / -60 - -55 °C 2: 64 percent / NaBH4 / tetrahydrofuran; ethanol 3: 31 percent / 50 percent aq. AcOH / 1.) 75 deg C, 2 h, 2.) reflux, 10 min View Scheme