1: 68 percent / AlH3*Et2O / tetrahydrofuran / 0.5 h / 0 °C 2: 85 percent / Et3N / CH2Cl2 / 0 °C 3: aq. TFA / tetrahydrofuran / Ambient temperature 4: Na2CO3, Pb(OAc)4 / CH2Cl2 / 0.25 h / -78 °C 5: toluene / 3 h / 80 °C 6: lithium hexamethyldisilazane (LiHMDS) / tetrahydrofuran; hexamethylphosphoric acid triamide / 1 h / -78 - 0 °C 7: NaHCO3 / tetrahydrofuran; hexamethylphosphoric acid triamide / 1 h / Ambient temperature 8: tetra-n-butylammonium fluoride / tetrahydrofuran / Ambient temperature 9: LiOH / 1,2-dimethoxy-ethane; H2O / Ambient temperature View Scheme

With  aluminium hydride * diethyl ether in  tetrahydrofuran T=0°C; 0.5 h;   

Multi-step reaction with 2 steps 1: 68 percent / AlH3*Et2O / tetrahydrofuran / 0.5 h / 0 °C2: 85 percent / Et3N / CH2Cl2 / 0 °C  

Multi-step reaction with 4 steps 1: 68 percent / AlH3*Et2O / tetrahydrofuran / 0.5 h / 0 °C2: 85 percent / Et3N / CH2Cl2 / 0 °C3: aq. TFA / tetrahydrofuran / Ambient temperature4: Na2CO3, Pb(OAc)4 / CH2Cl2 / 0.25 h / -78 °C  

Multi-step reaction with 5 steps 1: 68 percent / AlH3*Et2O / tetrahydrofuran / 0.5 h / 0 °C2: 85 percent / Et3N / CH2Cl2 / 0 °C3: aq. TFA / tetrahydrofuran / Ambient temperature4: Na2CO3, Pb(OAc)4 / CH2Cl2 / 0.25 h / -78 °C5: toluene / 3 h / 80 °C