1: 64 percent / NaOC2H5 / 3.5 h / Heating 2: 89 percent / KOH / acetic acid; H2O; tetrahydrofuran / 12 h / 25 °C 3: 81 percent / 165 °C 4: thionyl chloride / 0.75 h / Heating 5: 93 percent / AlCl3 / CS2 / 3 h / Heating 6: 98 percent / NaBH4 / ethanol / 2 h / 25 °C 7: 92 percent / p-toluenesulfonic acid*H2O / benzene / 1 h / Heating 8: 98 percent / NiCl2<dppp>2 / diethyl ether / Heating 9: 97 percent / H2 / PtO2 / tetrahydrofuran / 1034.3 Torr View Scheme

T=250 - 300°C; Leiten ueber Aluminiumoxyd-Siliciumdioxyd;

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