2-Bromo-4-chloro-1-(difluoromethoxy)benzene

To a solution of 2-bromo-4-chlorophenol (1 g, 4.8 mmol) in DMF/water (45 mL/5 mL) was added sodium chlorodifluoroacetate (1.95 g, 12.0 mmol) and cesium carbonate (3.14 g, 9.64 mmol), and the reaction mixture was heated to 100° C. for 4 hours. To a solution of 2-bromo-4-chlorophenol (4.98 g, 24.0 mmol) in DMF (25 mL) was added sodium chlorodifluoroacetate (8.42 g, 55.2 mmol), cesium carbonate (10.97 g, 33.67 mmol) and water (2.5 mL). To a solution of 2-bromo-4-chlorophenol (4.98 g, 24.0 mmol) in DMF (25 mL) was added sodium chlorodifluoroacetate (8.42 g, 55.2 mmol), cesium carbonate (10.97 g, 33.67 mmol) and water (2.5 mL). The reaction was stirred at 100 °C for 16 hours. The reaction mixture was partitioned between ethyl acetate and water, the organic portion washed with brine, dried (MgS0[1555] 36 ml of aqueous potassium hydroxide solution(6M) were added to a solution of 3.5 g (16.9 mmol) of2-bromo-4-chlorophenol in 36 ml of acetonitrile, the mixturewas cooled in an ice bath and 6.5 ml (26.9 mmol, 1.6 eq.) ofdifluoromethyl trifluormethanesulphonate [Angew. Chern.Int. Ed. 2013, 52, 1-5; Journal of Fluorine Chemistry 2009, 130, 667-670] were added dropwise with vigorous stirring.The reaction mixture was stirred for 5 min and diluted with200 ml of water. The aqueous phase was extracted twice within each case 150 ml of diethyl ether. The combined organicphases were dried (sodium sulphate), filtered, concentratedunder reduced pressure and dried. The aqueous phase wasonce more extracted with diethyl ether. The organic phasewas dried (sodium sulphate), filtered, concentrated underreduced pressure and dried. Yield of the two combined residues:3.4 g (80percent of theory)[1556] LC/MS [Method 9]: R, =3.51 min; MS (ESipos):m/z=256 (M+Ht[1557] 1H-NMR (400 MHz, DMSO-d6): o [ppm]=7.91 (d, lH), 7.55 (dd, lH), 7.37 (d, lH), 7.30 (t, lH).36 ml of aqueous potassium hydroxide solution (6M) were added to a solution of 3.5 g (16.9 mmol) of 2-bromo-4-chlorophenol in 36 ml of acetonitrile, the mixture was cooled in an ice bath and 6.5 ml (26.9 mmol, 1.6 eq.) of difluoromethyl trifluormethanesulphonate [Angew. Chem. mt. Ed. 2013, 52, 1-5; Journal of Fluorine Chemistry 2009, 130, 667-670] were added dropwise with vigorous stirring. The reaction mixture was stirred for 5 mm and diluted with 200 ml of watet The aqueous phase was extracted twice with in each case 150 ml of diethyl ethet The combined organic phases were dried (sodium sulphate), filtered, concentrated under reduced pressure and dried. The aqueous phase was once more extracted with diethyl ethet The organic phase was dried (sodium sulphate), filtered, concentrated under reduced pressure and dried. Yield of the two combined residues: 3.4 g (80percent of theory)10654] LC/MS [Method 9]: R=3.51 mm; MS (ESIpos):mlz=256 (M+H), 10655] ‘H-NMR (400 MHz, DMSO-d5): ö [ppm]=7.91 (d, 1H), 7.55 (dd, 1H), 7.37 (d, 1H), 7.30 (t, 1H).36 ml of aqueous potassiumhydroxide solution (6M) were added to a solution of 3.5 g (16.9 mmol) of2-bromo-4-chlorophenol in 36 ml of acetonitrile, the mixture was cooled in anice bath and 6.5 ml (26.9 mmol, 1.6 eq.) of difluoromethyl trifluormethanesulphonate were added dropwise with vigorous stirring. The reaction mixture was stirredfor 5 min and diluted with 200 ml of water. The aqueous phase was extractedtwice with in each case 150 ml of diethyl ether. The combined organic phaseswere dried (sodium sulphate), filtered, concentrated under reduced pressure anddried. The aqueous phase was once more extracted with diethyl ether. Theorganic phase was dried (sodium sulphate), filtered, concentrated under reducedpressure and dried. Yield of the two combined residues: 3.4 g (80percent of theory)

Molecular Weight:257.46
XLogP3:4.2
Hydrogen Bond Acceptor Count:3
Rotatable Bond Count:2
Exact Mass:255.91021
Monoisotopic Mass:255.91021
Topological Polar Surface Area:9.2
Heavy Atom Count:12
Complexity:147
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes