boron trifluoride diethyl etherate in dichloromethane 24 h; Heating;

1: 92 percent / NaH / tetrahydrofuran / 1.) 0 deg C to room temperature, 30 min, 2.) 0 deg C, 1 h; room temperature, 4 h 2: 202 mg / t-BuOK / tetrahydrofuran / 1.) 30 min, 2.) 3 d 3: 86 percent / p-TsOH / 2 h / Heating 4: 1.) cerium chloride, 2.) 2percent HCl / 1.) THF, room temperature, 4 h, 2.) 20 min 5: 52 percent / BF3*Et2O / CH2Cl2 / 24 h / Heating View Scheme

1: 202 mg / t-BuOK / tetrahydrofuran / 1.) 30 min, 2.) 3 d 2: 86 percent / p-TsOH / 2 h / Heating 3: 1.) cerium chloride, 2.) 2percent HCl / 1.) THF, room temperature, 4 h, 2.) 20 min 4: 52 percent / BF3*Et2O / CH2Cl2 / 24 h / Heating View Scheme

1: 1.) cerium chloride, 2.) 2percent HCl / 1.) THF, room temperature, 4 h, 2.) 20 min 2: 52 percent / BF3*Et2O / CH2Cl2 / 24 h / Heating View Scheme

1: 86 percent / p-TsOH / 2 h / Heating 2: 1.) cerium chloride, 2.) 2percent HCl / 1.) THF, room temperature, 4 h, 2.) 20 min 3: 52 percent / BF3*Et2O / CH2Cl2 / 24 h / Heating View Scheme

1: PCl5; benzene 2: benzene; diethyl ether / Erhitzen des Reaktionsprodukts 3: peroxybenzoic acid 4: benzene; sodium methylate; methanol View Scheme

1: peroxybenzoic acid 2: benzene; sodium methylate; methanol View Scheme

1: benzene; diethyl ether / Erhitzen des Reaktionsprodukts 2: peroxybenzoic acid 3: benzene; sodium methylate; methanol View Scheme

methanol; sodium methylate; benzene