1.1: molybdenum hexacarbonate / benzene / 0.5 h / 80 °C / |Inert atmosphere 1.2: 2 h / 80 °C / |Inert atmosphere 2.1: titanium (IV) bromide / dichloromethane / 72 h / 20 °C / |Inert atmosphere 3.1: chromic acid / acetone / |Inert atmosphere 4.1: 2,2,6,6-tetramethylpiperidinyl-lithium / tetrahydrofuran / 1 h / -25 °C / |Inert atmosphere 5.1: tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere 5.2: 6 h / -10 - 20 °C / |Inert atmosphere 6.1: potassium tert-butylate / water; dimethyl sulfoxide / 2 h / 20 °C / |Inert atmosphere 6.2: pH 2 / |Cooling with ice View Scheme

1.1: molybdenum hexacarbonate / benzene / 0.5 h / 80 °C / |Inert atmosphere 1.2: 2 h / 80 °C / |Inert atmosphere 2.1: titanium (IV) bromide / dichloromethane / 72 h / 20 °C / |Inert atmosphere 3.1: chromic acid / acetone / |Inert atmosphere 4.1: 2,2,6,6-tetramethylpiperidinyl-lithium / tetrahydrofuran / 1 h / -25 °C / |Inert atmosphere 5.1: tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere 5.2: 6 h / -10 - 20 °C / |Inert atmosphere 6.1: potassium tert-butylate / water; dimethyl sulfoxide / 2 h / 20 °C / |Inert atmosphere 6.2: pH 2 / |Cooling with ice View Scheme

1.1: molybdenum hexacarbonate / benzene / 0.5 h / 80 °C / |Inert atmosphere 1.2: 2 h / 80 °C / |Inert atmosphere 2.1: titanium (IV) bromide / dichloromethane / 72 h / 20 °C / |Inert atmosphere 3.1: chromic acid / acetone / |Inert atmosphere 4.1: 2,2,6,6-tetramethylpiperidinyl-lithium / tetrahydrofuran / 1 h / -25 °C / |Inert atmosphere 5.1: tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere 5.2: 6 h / -10 - 20 °C / |Inert atmosphere 6.1: potassium hydroxide / water; dimethyl sulfoxide / 1 h / 70 °C / |Inert atmosphere View Scheme

1.1: molybdenum hexacarbonate / benzene / 0.5 h / 80 °C / |Inert atmosphere 1.2: 2 h / 80 °C / |Inert atmosphere 2.1: titanium (IV) bromide / dichloromethane / 72 h / 20 °C / |Inert atmosphere 3.1: chromic acid / acetone / |Inert atmosphere 4.1: 2,2,6,6-tetramethylpiperidinyl-lithium / tetrahydrofuran / 1 h / -25 °C / |Inert atmosphere 5.1: tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere 5.2: 6 h / -10 - 20 °C / |Inert atmosphere 6.1: potassium hydroxide / water; dimethyl sulfoxide / 3 h / 20 °C / |Inert atmosphere View Scheme