2,6-dibromo-4-fluorophenol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2,6-dibromo-4-fluoro-phenol (55 g, 0.20 mol), potassium carbonate (60 g, 0.43 mol), 1-bromo-2-chloroethane (32.5 g, 0.23 mol) and 2-butanone (500 mL) was heated to reflux for 2 hours and allowed to cool to ambient temperature. The solids were filtered and the solvent was removed under vacuum to afford an oil. The oil was dissolved in diethyl ether (300 mL) and washed with water, dried over anhydrous magnesium sulfate, charcoalized, and filtered through Solka floc to afford 65.9 g (97.2%) of an oil; MS EI m/e 330/332/334/336 (M+ ; 1H NMR (CDCl3) δ 3.89 (2H, t, J=6.1 Hz), 4.23 (2H, t, J=6.1 Hz), 7.28 (2H, d, J=7.5 Hz). was heated to reflux for 2 hours The solids were filtered the solvent was removed under vacuum to afford an oil washed with water dried over anhydrous magnesium sulfate filtered through Solka floc

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2,6-dibromo-4-fluoro-phenol (55 g, 0.20 mol), potassium carbonate (60 g, 0.43 mol), 1-bromo-2-chloroethane (32.5 g, 0.23 mol) and 2-butanone (500 mL) was heated to reflux for 2 hours and allowed to cool to ambient temperature. The solids were filtered and the solvent was removed under vacuum to afford an oil. The oil was dissolved in diethyl ether (300 mL) and washed with water, dried over anhydrous magnesium sulfate, charcaolized, and filtered through Solka floc to afford 65.9 g (97.2%) of an oil; MS EI m/e 330/332/334/336 (M+); 1H NMR (.CDCl3) δ 3.89 (2H, t, J=6.1 Hz), 4.23 (2H, t, J=6.1 Hz), 7.28 (2H, d, J=7.5 Hz). was heated to reflux for 2 hours The solids were filtered the solvent was removed under vacuum to afford an oil washed with water dried over anhydrous magnesium sulfate filtered through Solka floc

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2,6-dibromo-4-fluoro-phenol (55 g, 0.20 mol), potassium carbonate (60 g, 0.43 mol), 1-bromo-2-chloroethane (32.5 g, 0.23 mol) and 2-butanone (500 mL) was heated to reflux for 2 hours and allowed to cool to ambient temperature. The solids were filtered and the solvent was removed under vacuum to afford an oil. The oil was dissolved in diethyl ether (300 mL) and washed with water, dried over anhydrous magnesium sulfate, charcaolized, and filtered through Solka floc to afford 65.9 g (97.2%) of an oil; MS EI m/e 330/332/334/336 (M+); 1H NMR (.CDCl3) δ 3.89 (2H, t, J=6.1 Hz), 4.23 (2H, t, J=6.1 Hz), 7.28 (2H, d, J=7.5 Hz). was heated to reflux for 2 hours The solids were filtered the solvent was removed under vacuum to afford an oil washed with water dried over anhydrous magnesium sulfate filtered through Solka floc

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: DMF (50 mL), 1-bromo-2-chloroethane (1.0 mL, 12 mmol), and potassium carbonate (1.7 g, 12 mmol) were added to 2,6-dibromo-4-fluorophenol (3.0 g, 11 mmol), and stirred at 50° C. overnight. Ethyl acetate was used as an extraction solvent, and after washing with water and saturated brine, and the resultant was dried over magnesium sulfate. The solvent was distilled away under reduced pressure. The resulting residue was purified by silica gel column chromatography to thus obtain the title compound. after washing with water and saturated brine the resultant was dried over magnesium sulfate The solvent was distilled away under reduced pressure The resulting residue was purified by silica gel column chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2.21 g (96 mmol) of sodium is dissolved in 66 ml of ethanol with exclusion of moisture. 21.6 g (80 mmol) of 2,6-dibromo-4-fluorophenol is added to this solution. A suspension results. 20.5 g (120 mmol) of benzyl bromide is added to the suspension. It is stirred for 30 minutes at room temperature and then is refluxed for 1 hour. A sample of the suspension then reacts neutrally to moist reaction paper. The precipitate of the sodium bromide is suctioned off, the filtrate is evaporated to dryness and the residue is crystallized from ethanol. 23.7 g (66 mmol)=82.5% of the theoretical yield is obtained as a crystallizate. Melting point 83° C. A suspension results is refluxed for 1 hour A sample of the suspension then reacts neutrally to moist reaction paper the filtrate is evaporated to dryness the residue is crystallized from ethanol 23.7 g (66 mmol)=82.5% of the theoretical yield is obtained as a crystallizate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2.21 g (96 mmol) of sodium is dissolved in 66 ml of ethanol with exclusion of moisture. 21.6 g (80 mmol) of 2,6-dibromo-4-fluorophenol is added to this solution. A suspension results. 20.5 g (120 mmol) of benzyl bromide is added to the suspension. It is stirred for 30 minutes at room temperature and then is refluxed for 1 hour. A sample of the suspension then reacts neutrally to moist reaction paper. The precipitate of the sodium bromide is suctioned off, the filtrate is evaporated to dryness and the residue is crystallized from ethanol. 23.7 g (66 mmol)=82.5% of the theoretical yield is obtained as a crystallizate. Melting point 83° C. A suspension results is refluxed for 1 hour A sample of the suspension then reacts neutrally to moist reaction paper the filtrate is evaporated to dryness the residue is crystallized from ethanol 23.7 g (66 mmol)=82.5% of the theoretical yield is obtained as a crystallizate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2,6-dibromo-4-fluoro-phenol (55 g, 0.20 mol), potassium carbonate (60 g, 0.43 mol), 1-bromo-2-chloroethane (32.5 g, 0.23 mol) and 2-butanone (500 mL) was heated to reflux for 2 hours and allowed to cool to ambient temperature. The solids were filtered and the solvent was removed under vacuum to afford an oil. The oil was dissolved in diethyl ether (300 mL) and washed with water, dried over anhydrous magnesium sulfate, charcoalized, and filtered through Solka floc to afford 65.9 g (97.2%) of an oil; MS EI m/e 330/332/334/336 (M+ ; 1H NMR (CDCl3) δ 3.89 (2H, t, J=6.1 Hz), 4.23 (2H, t, J=6.1 Hz), 7.28 (2H, d, J=7.5 Hz). was heated to reflux for 2 hours The solids were filtered the solvent was removed under vacuum to afford an oil washed with water dried over anhydrous magnesium sulfate filtered through Solka floc

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2,6-dibromo-4-fluoro-phenol (55 g, 0.20 mol), potassium carbonate (60 g, 0.43 mol), 1-bromo-2-chloroethane (32.5 g, 0.23 mol) and 2-butanone (500 mL) was heated to reflux for 2 hours and allowed to cool to ambient temperature. The solids were filtered and the solvent was removed under vacuum to afford an oil. The oil was dissolved in diethyl ether (300 mL) and washed with water, dried over anhydrous magnesium sulfate, charcoalized, and filtered through Solka floc to afford 65.9 g (97.2%) of an oil; MS EI m/e 330/332/334/336 (M+ ; 1H NMR (CDCl3) δ 3.89 (2H, t, J=6.1 Hz), 4.23 (2H, t, J=6.1 Hz), 7.28 (2H, d, J=7.5 Hz). was heated to reflux for 2 hours The solids were filtered the solvent was removed under vacuum to afford an oil washed with water dried over anhydrous magnesium sulfate filtered through Solka floc

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 2,6-dibromo-4-fluorophenol (214.5 g, 0.794 mol) in acetone (4.3 L), potassium carbonate (120.6 g, 0.874 mol) and methyl iodide (54.4 mL, 0.874 mol) were added at room temperature. The mixture was heated to reflux for 1.5 hours cooled to 25° C. and filtered, washing the filter cake with dichloromethane (2×1.5 L). The filtrate was concentrated in vacuo at 40° C. The crude product was slurred in dichloromethane (1 L) for 30 minutes at 25° C., filtered and concentrated in vacuo at 40° C. to give 1,3-Dibromo-5-fluoro-2-methoxybenzene as an off-white crystalline solid (223.3 g, 98.9%). The mixture was heated to reflux for 1.5 hours filtered washing the filter cake with dichloromethane (2×1.5 L) The filtrate was concentrated in vacuo at 40° C filtered concentrated in vacuo at 40° C.

Conditions: temp:0.00; pressure:0.00; stir: