in diphenylether T=225 - 230°C; 1 h;

1: 87 percent / K2CO3 / dimethylformamide / 6 h / 60 °C 2: 47 percent / diphenyl ether / 1 h / 225 - 230 °C View Scheme

1: 64 percent / 85percent m-chloroperoxybenzoic acid / CH2Cl2 / 20 h / Ambient temperature 2: 1) NaOH; 2) CH3COONa / 1) methanol, water, THF, 10 deg C, 1 h; 2) 140 deg C, 30 min. 3: 85 percent / Fe powder / ethanol; acetic acid / 0.42 h View Scheme

1: 64 percent / 85percent m-chloroperoxybenzoic acid / CH2Cl2 / 20 h / Ambient temperature 2: 1) NaOH; 2) CH3COONa / 1) methanol, water, THF, 10 deg C, 1 h; 2) 140 deg C, 30 min. 3: 85 percent / Fe powder / ethanol; acetic acid / 0.42 h 4: 99 percent / K2CO3 / methanol / 0.58 h / Ambient temperature View Scheme

1: 64 percent / 85percent m-chloroperoxybenzoic acid / CH2Cl2 / 20 h / Ambient temperature 2: 1) NaOH; 2) CH3COONa / 1) methanol, water, THF, 10 deg C, 1 h; 2) 140 deg C, 30 min. 3: 90 percent / conc. H2SO4 / methanol / 24 h / Ambient temperature 4: Jones reagent / acetone / 4 h 5: conc. H2SO4 / Ambient temperature; overnight 6: 65 percent / Fe powder / ethanol; acetic acid / 0.42 h 7: 47 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / benzene / 16 h / Ambient temperature View Scheme

1: 64 percent / 85percent m-chloroperoxybenzoic acid / CH2Cl2 / 20 h / Ambient temperature 2: 1) NaOH; 2) CH3COONa / 1) methanol, water, THF, 10 deg C, 1 h; 2) 140 deg C, 30 min. 3: 90 percent / conc. H2SO4 / methanol / 24 h / Ambient temperature 4: Jones reagent / acetone / 4 h 5: conc. H2SO4 / Ambient temperature; overnight 6: 65 percent / Fe powder / ethanol; acetic acid / 0.42 h 7: 68 percent / Cu2Br2, Na2CO3 / various solvent(s) / 5.5 h / 170 °C 8: 81 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / benzene / 6 h / Heating View Scheme

1: 64 percent / 85percent m-chloroperoxybenzoic acid / CH2Cl2 / 20 h / Ambient temperature 2: 1) NaOH; 2) CH3COONa / 1) methanol, water, THF, 10 deg C, 1 h; 2) 140 deg C, 30 min. 3: 85 percent / Fe powder / ethanol; acetic acid / 0.42 h 4: 99 percent / K2CO3 / methanol / 0.58 h / Ambient temperature 5: 58 percent / Cu2Br2, Na2CO3 / various solvent(s) / 3 h / 170 °C View Scheme