4-bromo-3-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:

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:0.00; pressure:0.00; stir:

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

Procedure: 2-Fluoro-4′-(methylsulfonyl)-4-biphenylol (0.58 g, 71%) was prepared as a white solid from [4-(methylsulfonyl)phenyl]boronic acid (0.69 g, 3.38 mmol), 4-bromo-3-fluorophenol (0.6 g, 3.05 mmol), 2M Na2CO3 (18 mL) and Pd(PPh3)4 (30 mg, 0.03 mmol) in DME (18 mL) in a manner similar to Example 1, Step 1. 1H NMR (400 MHz, CDCl3): δ 7.98 (d, 2H, J=8.3 Hz), 7.69 (d, 2H, J=7.4 Hz), 7.40-7.30 (m, 1H), 6.80-6.65 (m, 2H), 5.10 (s, 1H), 3.09 (s, 3H); LRMS (ESI), m/z 267 (M+H).

Conditions: temp:180.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Bromo-3-fluorophenol (0.5 g, 2.61 mmol) was added to a solution of sodium hydride (0.115 g, 2.90 mmol) in DMF (5 ml). After stiffing for 10 minutes 4-nitro-2-picoline N-oxide (0.37 g, 2.41 mmol) was added. The reaction mixture was heated at 180° C. for 1 hour under microwave irradiation. After cooling to room temperature the mixture was filtered through diatomaceous earth and this was thoroughly washed with EtOAc. The filtrate was washed with water (2×25 ml), the organic fraction was dried (Na2SO4) and the solvent evaporated in vacuo. The crude product was purified by column chromatography (silica gel; 0-3% methanol/DCM as eluent). The desired fractions were collected and evaporated in vacuo to yield intermediate D12 (0.33 g, 49%). After cooling to room temperature the mixture was filtered through diatomaceous earth this was thoroughly washed with EtOAc The filtrate was washed with water (2×25 ml) the organic fraction was dried (Na2SO4) the solvent evaporated in vacuo The crude product was purified by column chromatography (silica gel; 0-3% methanol/DCM as eluent) The desired fractions were collected evaporated in vacuo to yield intermediate D12 (0.33 g, 49%)

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

Procedure: The title compound was prepared from 4-bromo-3-fluorophenol and 2,2,3,3,3,-pentafluoropropyl triflate with potassium carbonate in acetone at ambient temperature for 18 hours. Kugelrohr distillation provided a colorless oil, b.p. 105-110° C./12 mbar. Kugelrohr distillation provided a colorless oil, b.p. 105-110° C./12 mbar

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

Procedure: The title compound was prepared from 4-bromo-3-fluorophenol and (3-methyl-oxetan-3-yl)-methanol in analogy to Example 9c): MS (EI): 274 and 276 M+.