1-BROMO-4-(1,3-DIOXOLAN-2-YL)-3-FLUOROBENZENE

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

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

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

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

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a THF (40 mL) solution of 2-(4-bromo-2-fluorophenyl)-1,3-dioxolane (3.29 g) was added Mg (406 mg) and I2 (135 mg), then the resultant mixture was refluxed for 5 hours. After cooling to 0° C., the reaction mixture was added ethylene oxide (12.5 mL, 1.1 M in THF), then the resultant mixture was stirred at 50° C. for 3 hours. The reaction mixture was added ethylene oxide (12.5 mL, 1.1 M in THF), the resultant mixture was stirred at 50° C. over night. The mixture was poured into saturated aqueous NH4Cl, and extracted with AcOEt. The organic layer was washed with water and saturated aqueous NaCl, dried over anhydrous Na2SO4, and evaporated. The residue was purified by silica gel column chromatography (n-hexane/AcOEt=99/1 to 4/1) to afford a colorless oil. To a THF (10 mL) solution of that colorless oil and PPh3 (857 mg) and alpha,alpha,alpha-trifluoro-p-cresol (530 mg) were added DEAD (1.486 mL, 2.2 M in toluene) at 0° C., then the resultant mixture was stirred at room temperature over night. The reaction mixture was evaporated, to the residue was added n-hexane/AcOEt (4/1), then the mixture was filtered, and the filtrate was evaporated. The residue was purified by silica gel column chromatography (n-hexane/AcOEt=1/0 to 9/1) to afford 2-(2-fluoro-4-{2-[4-(trifluoromethyl)phenoxy]ethyl}phenyl)-1,3-dioxolane as a colorless oil (0.552 g). extracted with AcOEt The organic layer was washed with water and saturated aqueous NaCl dried over anhydrous Na2SO4 evaporated The residue was purified by silica gel column chromatography (n-hexane/AcOEt=99/1 to 4/1) to afford a colorless oil The reaction mixture was evaporated, to the residue was added n-hexane/AcOEt (4/1) the mixture was filtered the filtrate was evaporated The residue was purified by silica gel column chromatography (n-hexane/AcOEt=1/0 to 9/1)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a THF (40 mL) solution of 2-(4-bromo-2-fluorophenyl)-1,3-dioxolane (3.29 g) was added Mg (406 mg) and I2 (135 mg), then the resultant mixture was refluxed for 5 hours. After cooling to 0° C., the reaction mixture was added ethylene oxide (12.5 mL, 1.1 M in THF), then the resultant mixture was stirred at 50° C. for 3 hours. The reaction mixture was added ethylene oxide (12.5 mL, 1.1 M in THF), the resultant mixture was stirred at 50° C. over night. The mixture was poured into saturated aqueous NH4Cl, and extracted with AcOEt. The organic layer was washed with water and saturated aqueous NaCl, dried over anhydrous Na2SO4, and evaporated. The residue was purified by silica gel column chromatography (n-hexane/AcOEt=99/1 to 4/1) to afford a colorless oil. To a THF (10 mL) solution of that colorless oil and PPh3 (857 mg) and alpha,alpha,alpha-trifluoro-p-cresol (530 mg) were added DEAD (1.486 mL, 2.2 M in toluene) at 0° C., then the resultant mixture was stirred at room temperature over night. The reaction mixture was evaporated, to the residue was added n-hexane/AcOEt (4/1), then the mixture was filtered, and the filtrate was evaporated. The residue was purified by silica gel column chromatography (n-hexane/AcOEt=1/0 to 9/1) to afford 2-(2-fluoro-4-{2-[4-(trifluoromethyl)phenoxy]ethyl}phenyl)-1,3-dioxolane as a colorless oil (0.552 g). extracted with AcOEt The organic layer was washed with water and saturated aqueous NaCl dried over anhydrous Na2SO4 evaporated The residue was purified by silica gel column chromatography (n-hexane/AcOEt=99/1 to 4/1) to afford a colorless oil The reaction mixture was evaporated, to the residue was added n-hexane/AcOEt (4/1) the mixture was filtered the filtrate was evaporated The residue was purified by silica gel column chromatography (n-hexane/AcOEt=1/0 to 9/1)

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

Procedure: To a toluene (99 mL) solution of 4-bromo-2-fluorobenzaldehyde (10.00 g) was added ethylene glycol (3.30 mL) and toluenesulfonic acid (849 mg), then the resultant mixture was refluxed for 8 hours. The mixture was poured into saturated aqueous NaHCO3, and extracted with AcOEt. The organic layer was washed with water and saturated aqueous NaCl, dried over anhydrous Na2SO4, and evaporated. The residue was purified by silica gel column chromatography (n-hexane/AcOEt=99/1 to 95/5) to afford 2-(4-bromo-2-fluorophenyl)-1,3-dioxolane as a colorless oil (11.046 g). extracted with AcOEt The organic layer was washed with water and saturated aqueous NaCl dried over anhydrous Na2SO4 evaporated The residue was purified by silica gel column chromatography (n-hexane/AcOEt=99/1 to 95/5)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a tetrahydrofuran (600 mL) solution of 2-(4-bromo-2-fluoro-phenyl)-[1,3]dioxolane (12.5 g, 50.7 mmol) described in Manufacturing Example 204-1-1 was added dropwise n-butyl lithium (28.5 mL, 2.67 M hexane solution, 76.1 mmol) over 15 minute. The system was stirred for 5 minutes at −78° C., after which a THF solution of N-formylmorpholine (5.61 mL, 55.8 mmol) was added to this reaction solution, which was stirred for another 2.5 hours at room temperature. Water and ethyl acetate were added to this mixture, which was partitioned. The organic layer was separated, washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure to obtain the title compound (9.99 g). The title compound was used in the following reaction without any further purification. was stirred for another 2.5 hours at room temperature was partitioned The organic layer was separated washed with saturated aqueous sodium chloride dried over anhydrous magnesium sulfate filtered The filtrate was concentrated under a reduced pressure

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

Procedure: A mixture of 4-bromo-2-fluorobenzaldehyde (10 g, 49.3 mmol), ethylene glycol (27.5 mL, 493 mmol), camphorsulfonic acid (115 mg, 0.493 mmol), and toluene (250 mL) was stirred for 5 hours under reflux. The mixture was cooled to room temperature and a saturated sodium hydrogencarbonate aqueous solution was added thereto. The organic layer was separated, washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure to obtain the title compound (12.5 g). The title compound was used in the following reaction without any further purification. under reflux The organic layer was separated washed with saturated aqueous sodium chloride dried over anhydrous magnesium sulfate filtered The filtrate was concentrated under a reduced pressure

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

Procedure: A mixture of 4-bromo-2-fluorobenzaldehyde (10 g, 49.3 mmol), ethylene glycol (27.5 mL, 493 mmol), camphorsulfonic acid (115 mg, 0.493 mmol), and toluene (250 mL) was stirred for 5 hours under reflux. The mixture was cooled to room temperature and a saturated sodium hydrogencarbonate aqueous solution was added thereto. The organic layer was separated, washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure to obtain the title compound (12.5 g). The title compound was used in the following reaction without any further purification. under reflux The organic layer was separated washed with saturated aqueous sodium chloride dried over anhydrous magnesium sulfate filtered The filtrate was concentrated under a reduced pressure

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

Procedure: Ditert-butyl malonate (1.95 g, 9.02 mmol) was dissolved in THF (8 mL) and sodium hydride (60% dispersion in mineral oil, 0.36 g, 9.00 mmol) was added. The mixture was stirred for 10 minutes before adding Pd(PtBu3)2 (0.17 g, 0.333 mmol) and a solution of 2-(4-bromo-2-fluorophenyl)-1,3-dioxolane (2.03 g, 8.22 mmol) in THF (16 mL). The resulting mixture was heated to reflux under N2 for 18 hours. Room temperature was attained, saturated NH4Cl (150 mL) was added and the products extracted into EtOAc (125 mL). The organic extracts were dried over MgSO4 and concentrated in vacuo. Purification of the residue by MPLC gave 2.47 g of desired product (pale yellow oil, 79%). 1H NNR (CDCl3) δ 7.50 (t, J=8.1 Hz, 1H), 7.16 (m, 2H), 6.07 (s, 1H), 4.40 (s, 1H), 4.13 (m, 2H), 4.03 (m, 2H), 1.45 (s, 18H). The resulting mixture was heated to reflux under N2 for 18 hours Room temperature the products extracted into EtOAc (125 mL) The organic extracts were dried over MgSO4 concentrated in vacuo Purification of the residue by MPLC

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

Procedure: 4-bromo-2-fluorobenzaldehyde (9.4 g, 46.3 mmol), ethylene glycol (13.2 mL), triethyl orthoformate (6.6 mL) and p-toluenesulfonic acid (0.09 g, 0.473 mmol) were stirred in DCE (50 mL) at 80° C. for 2.5 hours. Room temperature was attained and the solution was washed successively with saturated NaHCO3, H2O and brine, dried over MgSO4 and concentrated in vacuo to give 11.4 g of product (pale yellow oil, 100%). 1H NMR (CDCl3) δ 7.41 (t, J=8.1 Hz, 1H), 7.30 (dd, J=8.1, 1.8 Hz, 1H), 7.25 (dd, J=9.6, 1.8 Hz, 1H), 6.02 (s, 1H), 4.13 (m, 2H), 4.04 (m, 2H). Room temperature the solution was washed successively with saturated NaHCO3, H2O and brine dried over MgSO4 concentrated in vacuo