1.1: NaH / tetrahydrofuran / 1 h / 20 °C 1.2: tetrahydrofuran / 4 h / 50 °C 2.1: p-TsOH; MeOH / CH2Cl2 / 8 h / 20 °C 3.1: pyridine / diethyl ether; tetrahydrofuran / 4 h / Heating 3.2: H2O; pyridine / diethyl ether; tetrahydrofuran / 1 h 4.1: CHCl3; propan-2-ol; various solvent(s) / 5 h / 65 °C View Scheme

1.1: NaH / tetrahydrofuran / 1 h / 20 °C 1.2: tetrahydrofuran / 4 h / 50 °C 2.1: p-TsOH; MeOH / CH2Cl2 / 8 h / 20 °C View Scheme

1: 92 percent / NaH / tetrahydrofuran / Ambient temperature 2: 76 percent / boron trifluoride/methanol / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 92 percent / NaH / tetrahydrofuran / Ambient temperature 2: 76 percent / boron trifluoride/methanol / CH2Cl2 / 4 h / Ambient temperature 3: 1.) NEt3 / 1.) benzene, RT, 4 h, 2.) CH3CN, 65 deg C View Scheme

With  sodium hydride Alkylation;   

With  sodium hydride Alkylation;