1: DIBAL / toluene / 0.5 h / -78 °C 2: 372 mg / TsCl; DMAP / CH2Cl2 3: 88 percent / K2CO3; NaI / acetonitrile / 3 h / Heating 4: 29 mg 5: Jones' reagent / acetone / 2 h / 0 °C 6: 14.8 mg / diethyl ether; methanol / 0.25 h / 0 °C 7: 80 percent / LiHMDS / tetrahydrofuran / 1 h / 0 °C 8: 70 percent / aq. NaOH / methanol / 2 h / Heating View Scheme