in dichloromethane

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating 3: 96 percent / tetrahydrofuran / 3 h / Ambient temperature 4: 1.) 60percent NaH, 2.) p-toluenesulfonic acid monohydrate / 1.) THF, r.t., overnight, 2.) acetone, 0-5 deg C, 3 h 5: 86 percent / diethyl ether; tetrahydrofuran / 3 h / Ambient temperature 6: 104 mg / SOCl2 / pyridine / 17 h / 0 - 5 °C 7: 5 percent / BBr3 / CH2Cl2 / 2 h / -70 °C View Scheme

Fe2(S04)3; sulfuric acid; water in 1,4-dioxane 2 h; Heating;

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating View Scheme

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating 3: 95 percent / tetrahydrofuran / 3 h / Ambient temperature 4: 52 percent / cerium(IV) ammonium nitrate / acetonitrile; H2O / 0.5 h / 10 - 20 °C View Scheme

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating 3: 96 percent / tetrahydrofuran / 3 h / Ambient temperature 4: 87 percent / p-toluenesulfonic acid monohydrate / acetone / 3 h / 0 - 5 °C 5: 86 percent / diethyl ether; tetrahydrofuran / 3 h / Ambient temperature View Scheme

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating 3: 96 percent / tetrahydrofuran / 3 h / Ambient temperature 4: 87 percent / p-toluenesulfonic acid monohydrate / acetone / 3 h / 0 - 5 °C 5: 86 percent / diethyl ether; tetrahydrofuran / 3 h / Ambient temperature 6: 70 percent / cerium(IV) ammonium nitrate / CHCl3; acetonitrile; H2O / 0.17 h / Ambient temperature View Scheme

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating 3: 96 percent / tetrahydrofuran / 3 h / Ambient temperature 4: 87 percent / p-toluenesulfonic acid monohydrate / acetone / 3 h / 0 - 5 °C 5: 86 percent / diethyl ether; tetrahydrofuran / 3 h / Ambient temperature 6: 70 percent / cerium(IV) ammonium nitrate / CHCl3; acetonitrile; H2O / 0.17 h / Ambient temperature 7: 27 percent / AgO, 40percent HNO3 / acetone / 0.17 h / Ambient temperature View Scheme

1: 48 percent / 40percent NaOH, Na2S2O4 / methanol; H2O / 8 h / Heating 2: 99 percent / POCl3 / CHCl3 / 6 h / Heating 3: 96 percent / tetrahydrofuran / 3 h / Ambient temperature 4: 87 percent / p-toluenesulfonic acid monohydrate / acetone / 3 h / 0 - 5 °C View Scheme

in xylene 12 h; Ambient temperature;