1: 85 percent / Et3N / CH2Cl2 / 0 °C 2: aq. TFA / tetrahydrofuran / Ambient temperature 3: Na2CO3, Pb(OAc)4 / CH2Cl2 / 0.25 h / -78 °C 4: toluene / 3 h / 80 °C 5: lithium hexamethyldisilazane (LiHMDS) / tetrahydrofuran; hexamethylphosphoric acid triamide / 1 h / -78 - 0 °C 6: NaHCO3 / tetrahydrofuran; hexamethylphosphoric acid triamide / 1 h / Ambient temperature 7: tetra-n-butylammonium fluoride / tetrahydrofuran / Ambient temperature 8: 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 3 steps 1: 85 percent / Et3N / CH2Cl2 / 0 °C2: aq. TFA / tetrahydrofuran / Ambient temperature3: Na2CO3, Pb(OAc)4 / CH2Cl2 / 0.25 h / -78 °C  

Multi-step reaction with 4 steps 1: 85 percent / Et3N / CH2Cl2 / 0 °C2: aq. TFA / tetrahydrofuran / Ambient temperature3: Na2CO3, Pb(OAc)4 / CH2Cl2 / 0.25 h / -78 °C4: toluene / 3 h / 80 °C