2-(2,4-difluorophenyl)-1-(4-fluorophenyl)ethanone

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

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-(2,4-difluorophenyl)-1-(4-fluorophenyl)-1-ethanone (5.0 g, 20 mmol-see EP-A-0069442), sodium 1,2,4-triazole (2.18 g, 24 mmol) and N,N-dimethylacetamide (100 ml) was stirred at 100° C. for 18 hours. The mixture was diluted with xylene (300 ml) and concentrated under reduced pressure. The residue was dissolved in ethyl acetate (500 ml) and washed with water (3×50 ml). The organic solution was dried (MgSO4) and concentrated under reduced pressure. Purification by flash chromatography (eluting with ethyl acetate:dichloromethane 1:1) gave a white solid (1.05 g, 18%), which was characterised by 1H-N.M.R. spectroscopy. concentrated under reduced pressure The residue was dissolved in ethyl acetate (500 ml) washed with water (3×50 ml) The organic solution was dried (MgSO4) concentrated under reduced pressure Purification by flash chromatography (eluting with ethyl acetate:dichloromethane 1:1)

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-(2,4-difluorophenyl)-1-(4-fluorophenyl)-1-ethanone (5.0 g, 20 mmol-see EP-A-0069442), sodium 1,2,4-triazole (2.18 g, 24 mmol) and N,N-dimethylacetamide (100 ml) was stirred at 100° C. for 18 hours. The mixture was diluted with xylene (300 ml) and concentrated under reduced pressure. The residue was dissolved in ethyl acetate (500 ml) and washed with water (3×50 ml). The organic solution was dried (MgSO4) and concentrated under reduced pressure. Purification by flash chromatography (eluting with ethyl acetate:dichloromethane 1:1) gave a white solid (1.05 g, 18%), which was characterised by 1H-N.M.R. spectroscopy. concentrated under reduced pressure The residue was dissolved in ethyl acetate (500 ml) washed with water (3×50 ml) The organic solution was dried (MgSO4) concentrated under reduced pressure Purification by flash chromatography (eluting with ethyl acetate:dichloromethane 1:1)

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

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-(2,4-difluorophenyl)-1-(4-fluorophenyl)-1-ethanone (5.0 g, 20 mmol-see EP-A-0069442), sodium 1,2,4-triazole (2.18 g, 24 mmol) and N,N-dimethylacetamide (100 ml) was stirred at 100° C. for 18 hours. The mixture was diluted with xylene (300 ml) and concentrated under reduced pressure. The residue was dissolved in ethyl acetate (500 ml) and washed with water (3×50 ml). The organic solution was dried (MgSO4) and concentrated under reduced pressure. Purification by flash chromatography (eluting with ethyl acetate:dichloromethane 1:1) gave a white solid (1.05 g, 18%), which was characterised by 1H-N.M.R. spectroscopy. concentrated under reduced pressure The residue was dissolved in ethyl acetate (500 ml) washed with water (3×50 ml) The organic solution was dried (MgSO4) concentrated under reduced pressure Purification by flash chromatography (eluting with ethyl acetate:dichloromethane 1:1)