2,3,5-TRICHLOROBENZENEBORONIC ACID

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: A mixture of 2,3,5-trichloro-phenyl boronic acid (12 g, 53 mmol) and 4,6-dichloro-pyrimidin-2-yl-amine (10.5 g, 64 mmol) in ethylene glycol dimethyl ether (300 ml) under Argon atmosphere was stirred for 30 minutes. A mixture of palladium (II) acetate (1.8 g, 8 mmol), a solution of sodium carbonate (28.2 g, 270 mmol) in water (100 ml), and triphenylphosphine (4.2 g, 16 mmol) were added and the mixture was stirred for 18 hours. The mixture was treated with acetone (500 ml), filtered through a pad of celite under suction and concentrated under reduced pressure. The residue was treated with water (100 ml) and the mixture was stirred vigorously. The solid was filtered and dissolved in tetrahydrofuran (100 ml). Hydrogen chloride (4 M in dioxane, 20 ml) was added. After stirring for 1 hour, the solid was filtered and dried under reduced pressure. The solid was treated with ethyl acetate (50 ml) and stirred for 30 minutes. The solid was filtered and dried under reduced pressure to afford 4-chloro-6-(2,3,5-trichloro-phenyl)-pyrimidin-2-yl-amine-hydrochloride salt (3.7 g, 20% yield) as a white powder. the mixture was stirred for 18 hours filtered through a pad of celite under suction concentrated under reduced pressure The residue was treated with water (100 ml) the mixture was stirred vigorously The solid was filtered dissolved in tetrahydrofuran (100 ml) Hydrogen chloride (4 M in dioxane, 20 ml) was added After stirring for 1 hour the solid was filtered dried under reduced pressure The solid was treated with ethyl acetate (50 ml) stirred for 30 minutes The solid was filtered dried under reduced pressure

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 2,3,5-trichloro-phenyl boronic acid (12 g, 53 mmol) and 4,6-dichloro-pyrimidin-2-yl-amine (10.5 g, 64 mmol) in ethylene glycol dimethyl ether (300 ml) under Argon atmosphere was stirred for 30 minutes. A mixture of palladium (II) acetate (1.8 g, 8 mmol), a solution of sodium carbonate (28.2 g, 270 mmol) in water (100 ml), and triphenylphosphine (4.2 g, 16 mmol) were added and the mixture was stirred for 18 hours. The mixture was treated with acetone (500 ml), filtered through a pad of celite under suction and concentrated under reduced pressure. The residue was treated with water (100 ml) and the mixture was stirred vigorously. The solid was filtered and dissolved in tetrahydrofuran (100 ml). Hydrogen chloride (4 M in dioxane, 20 ml) was added. After stirring for 1 hour, the solid was filtered and dried under reduced pressure. The solid was treated with ethyl acetate (50 ml) and stirred for 30 minutes. The solid was filtered and dried under reduced pressure to afford 4-chloro-6-(2,3,5-trichloro-phenyl)-pyrimidin-2-yl-amine-hydrochloride salt (3.7 g, 20% yield) as a white powder. the mixture was stirred for 18 hours filtered through a pad of celite under suction concentrated under reduced pressure The residue was treated with water (100 ml) the mixture was stirred vigorously The solid was filtered dissolved in tetrahydrofuran (100 ml) Hydrogen chloride (4 M in dioxane, 20 ml) was added After stirring for 1 hour the solid was filtered dried under reduced pressure The solid was treated with ethyl acetate (50 ml) stirred for 30 minutes The solid was filtered dried under reduced pressure

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

Procedure: Compound number 261 (i.e., 6-chloro-5-(2,3,5-trichlorophenyl)-2-trifluoromethylbenzimidazole) was prepared as follows. A 100-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen. (2,3,5-trichlorophenyl)boronic acid (284 mg, 1.26 mmol, 2.00 equiv), dioxane (30 mL), 5-chloro-6-iodo-2-(trifluoromethyl)-1H-1,3-benzodiazole (200 mg, 0.58 mmol, 1.00 equiv), sodium carbonate (191 mg), water (8 mL) and Pd(PPh3)4 (34.7 mg) was placed in the flask. The resulting solution was stirred overnight at 100° C. in an oil bath. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:4). This resulted in 22.3 mg (10%) of 6-chloro-5-(2,3,5-trichlorophenyl)-2-trifluoromethylbenzimidazole as a white solid. A 100-mL round-bottom flask purged maintained with an inert atmosphere of nitrogen The resulting mixture was concentrated under vacuum This resulted in 22.3 mg (10%) of 6-chloro-5-(2,3,5-trichlorophenyl)-2-trifluoromethylbenzimidazole as a white solid

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

Procedure: A solution of 2,3,5-trichlorobenzeneboronic acid (1.62 g, 7.18×10−3 mole) in absolute ethanol (2.05 ml) was added slowly to a mixture of 2-amino-3-bromo-6-chloropyrazine (1 g, 5.1×10−3 mole) and tetrakis(triphenylphospine)palladium(0) (0.334 g,2.89×1−4 mole) in benzene (10.20 ml)/2M aqueous sodium carbonate (5.50 ml). The mixture was refluxed for 17 hrs. The cooled reaction mixture was evaporated in vacuo and then extracted with chloroform (50 ml). The chloroform layer was washed with water (2×30 ml), dried over anhydrous magnesium sulphate, filtered and the filtrate evaporated down in vacuo. The residue was triturated with 40-60° C. petroleum ether, filtered and dried in vacuo. Yield 0.205 g (14%), M.p. 211-214° C. The mixture was refluxed for 17 hrs The cooled reaction mixture was evaporated in vacuo extracted with chloroform (50 ml) The chloroform layer was washed with water (2×30 ml) dried over anhydrous magnesium sulphate filtered the filtrate evaporated down in vacuo The residue was triturated with 40-60° C. petroleum ether filtered dried in vacuo

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

Procedure: A solution of 2,3,5-trichlorobromobenzene (8.60 g, 0.033 mole) in dry ether (33 ml) and bromoethane (4.73 ml, 7.31 g, 0.067 mole) was added dropwise to a suspension of magnesium turnings (2.80 g, 0.12 mole) in dry ether (21.50 ml) at room temperature. The mixture was refluxed for 0.50 hr and cooled to room temperature. The mixture was then added dropwise under nitrogen to a solution of trimethylborate (5.16 ml, 5.16 g, 0.05 mole) in dry ether (8.60 ml) maintaining the temperature below −60° C. This was warmed to room temperature overnight, then cooled in an ice-bath and treated with 2M hydrochloric acid (10 ml). The ether layer was separated, washed with water (2×20 ml), dried over anhydrous magnesium sulphate, filtered and the filtrate evaporated in vacuo. The residue was triturated with 40-60° C. petroleum ether, filtered and dried in vacuo. Yield 4.57 g (61%), M.p. 257-260° C. The mixture was refluxed for 0.50 hr maintaining the temperature below −60° C This was warmed to room temperature overnight cooled in an ice-bath The ether layer was separated washed with water (2×20 ml) dried over anhydrous magnesium sulphate filtered the filtrate evaporated in vacuo The residue was triturated with 40-60° C. petroleum ether filtered dried in vacuo

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

Procedure: Using the conditions of General Procedure A for Suzuki Coupling and Hydrolysis in Parallel Mode, 2-bromo-5-[4-(3,4-dichloro-phenyl)-thiazol-2-yl]-benzoic acid methyl ester (which may be prepared as described for Intermediate 6; 111 mg, 0.25 mmol) was reacted with 2,3,5-trichlorophenylboronic acid (available from Alfa Aesar; 113 mg, 0.5 mmol). The resulting ester was hydrolyzed and the acid was purified to give 2′,3′,5′-trichloro-4-[4-(3,4-dichloro-phenyl)-thiazol-2-yl]-biphenyl-2-carboxylic acid (2.5 mg, 2%). 1H NMR (300 MHz, DMSO-d6) δ 13.27 (br s, 1H), 8.58 (d, J=1.9 Hz, 1H), 8.50 (s, 1H), 8.34 (d, J=2.1 Hz, 1H), 8.30 (d, J=7.9 Hz, 1H), 8.10 (dd, J=8.4, 2.0 Hz, 1H), 8.00 (d, J=2.4 Hz, 1H), 7.88 (d, J=2.4 Hz, 1H), 7.77 (d, J=8.5 Hz, 1H), 7.64 (d, J=2.4 Hz, 1H), 7.47-7.53 (m, 1H). the acid was purified

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

Procedure: Compound number 261 (i.e., 6-chloro-5-(2,3,5-trichlorophenyl)-2-trifluoromethylbenzimidazole) was prepared as follows. A 100-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen. (2,3,5-trichlorophenyl)boronic acid (284 mg, 1.26 mmol, 2.00 equiv), dioxane (30 mL), 5-chloro-6-iodo-2-(trifluoromethyl)-1H-1,3-benzodiazole (200 mg, 0.58 mmol, 1.00 equiv), sodium carbonate (191 mg), water (8 mL) and Pd(PPh3)4 (34.7 mg) was placed in the flask. The resulting solution was stirred overnight at 100° C. in an oil bath. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:4). This resulted in 22.3 mg (10%) of 6-chloro-5-(2,3,5-trichlorophenyl)-2-trifluoromethylbenzimidazole as a white solid. A 100-mL round-bottom flask purged maintained with an inert atmosphere of nitrogen The resulting mixture was concentrated under vacuum This resulted in 22.3 mg (10%) of 6-chloro-5-(2,3,5-trichlorophenyl)-2-trifluoromethylbenzimidazole as a white solid