1: 0.5 h / 185 - 190 °C 2: 70 percent / 1.) r. t. overnight 2.) 3 h 50 deg C 3: 74 percent / PTS / benzene / 6 h / Heating 4: H2O / PTS / acetone / 24 h / Ambient temperature 5: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

1: 50 percent / mercuric acetate / 10 h / Heating 2: 0.5 h / 185 - 190 °C 3: 70 percent / 1.) r. t. overnight 2.) 3 h 50 deg C 4: 74 percent / PTS / benzene / 6 h / Heating 5: H2O / PTS / acetone / 24 h / Ambient temperature 6: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

1: 70 percent / 1.) r. t. overnight 2.) 3 h 50 deg C 2: 74 percent / PTS / benzene / 6 h / Heating 3: H2O / PTS / acetone / 24 h / Ambient temperature 4: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

1: 75 percent / LAH / diethyl ether 2: 50 percent / mercuric acetate / 10 h / Heating 3: 0.5 h / 185 - 190 °C 4: 70 percent / 1.) r. t. overnight 2.) 3 h 50 deg C 5: 74 percent / PTS / benzene / 6 h / Heating 6: H2O / PTS / acetone / 24 h / Ambient temperature 7: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

1: 75 percent / 1) LAH / diethyl ether / Ambient temperature 2: 75 percent / LAH / diethyl ether 3: 50 percent / mercuric acetate / 10 h / Heating 4: 0.5 h / 185 - 190 °C 5: 70 percent / 1.) r. t. overnight 2.) 3 h 50 deg C 6: 74 percent / PTS / benzene / 6 h / Heating 7: H2O / PTS / acetone / 24 h / Ambient temperature 8: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

1: 76 percent / p-toluenesulphonic acid / benzene / Heating 2: 75 percent / 1) LAH / diethyl ether / Ambient temperature 3: 75 percent / LAH / diethyl ether 4: 50 percent / mercuric acetate / 10 h / Heating 5: 0.5 h / 185 - 190 °C 6: 70 percent / 1.) r. t. overnight 2.) 3 h 50 deg C 7: 74 percent / PTS / benzene / 6 h / Heating 8: H2O / PTS / acetone / 24 h / Ambient temperature 9: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

1: 74 percent / PTS / benzene / 6 h / Heating 2: H2O / PTS / acetone / 24 h / Ambient temperature 3: 79 percent / diethyl ether / 1.) 8 h 2.) reflux 2 h View Scheme

in diethyl ether 1.) 8 h 2.) reflux 2 h;

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lithium aluminium tetrahydride in diethyl ether