1: 85 percent / K2CO3 / dimethylformamide / Ambient temperature 2: CDCl3 / 36 h / 30 °C View Scheme

1: 1.) NaH; 2.) HCl / 1.) THF, oil, DMF, 45 deg C, 2 h; 2.) THF, DMF, H2O, r.t., 1 h 2: 89 percent / PCC, MS 4A / CH2Cl2 / 1 h / Ambient temperature 3: 88 percent / PPh3 / CH2Cl2 / 0.08 h / 0 °C 4: 82 percent / BuLi / hexane; tetrahydrofuran / 0.17 h / -78 °C 5: 76 percent / Ni(acac)2, DIBAH, PPh3 / hexane; tetrahydrofuran / 18 h / Ambient temperature View Scheme

1: 89 percent / PCC, MS 4A / CH2Cl2 / 1 h / Ambient temperature 2: 88 percent / PPh3 / CH2Cl2 / 0.08 h / 0 °C 3: 82 percent / BuLi / hexane; tetrahydrofuran / 0.17 h / -78 °C 4: 76 percent / Ni(acac)2, DIBAH, PPh3 / hexane; tetrahydrofuran / 18 h / Ambient temperature View Scheme

1: 88 percent / PPh3 / CH2Cl2 / 0.08 h / 0 °C 2: 82 percent / BuLi / hexane; tetrahydrofuran / 0.17 h / -78 °C 3: 76 percent / Ni(acac)2, DIBAH, PPh3 / hexane; tetrahydrofuran / 18 h / Ambient temperature View Scheme

1: 82 percent / BuLi / hexane; tetrahydrofuran / 0.17 h / -78 °C 2: 76 percent / Ni(acac)2, DIBAH, PPh3 / hexane; tetrahydrofuran / 18 h / Ambient temperature View Scheme

1: Na, butanol / Heating 2: 10percent aq. NaOH / H2O / 95 °C View Scheme

1: K2CO3; acetone / und anschliessendes Hydrolysieren mit wss.-methanol.NaOH 2: polyphosphoric acid View Scheme

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und anschliessendes mit AlCl3;