5-chloro-2-iodoaniline

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

Procedure: A mixture of 5-chloro-2-iodoaniline (33.0 g, 0.13 mol) and 1-ethynyl-4-fluorobenzene (26.4 g, 0.22 mol) in diethylamine (400 mL) was degassed with bubbling nitrogen for 20 min., then tetrakis(triphenylphosphine)palladium(0) (2.0 g, 1.7 mmol) and copper (I) iodide (170 mg, 0.9 mmol) were added and the mixture was stirred at room temperature for 12 h. The solvent was evaporated under reduced pressure, water was added and the mixture was extracted with ethyl acetate. The combined organic fractions were washed with water (2×), dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was dissolved in dimethylformamide (250 mL), calcium carbonate (13 g, 0.13 mol) and copper (I) iodide (12.4 g, 0.07 mol) were added and the mixture was stirred at 120° C. for 22 h. The mixture was cooled, filtered and the solvent was evaporated under reduced pressure. Water was added and the mixture was extracted with ethyl acetate. The combined organic fractions were washed with water (2×) and brine, dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was triturated with ether/hexane and the solid was collected and dried in vacuo to give the title compound (25.4 g, 85%). 1H NMR (360 MHz, CDCl3) δ 7.59 (2H, m), 7.49 (1H, d, J 8.5 Hz), 7.44 (1H, s), 7.24-6.99 (3H, m), and 6.69 (1H, d, J 1.8 Hz). was degassed with bubbling nitrogen for 20 min. The solvent was evaporated under reduced pressure, water was added the mixture was extracted with ethyl acetate The combined organic fractions were washed with water (2×) dried (MgSO4) the solvent was evaporated under reduced pressure The residue was dissolved in dimethylformamide (250 mL) the mixture was stirred at 120° C. for 22 h The mixture was cooled filtered the solvent was evaporated under reduced pressure Water was added the mixture was extracted with ethyl acetate The combined organic fractions were washed with water (2×) and brine dried (MgSO4) the solvent was evaporated under reduced pressure The residue was triturated with ether/hexane the solid was collected dried in vacuo

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

Procedure: A mixture of 5-chloro-2-iodoaniline (33.0 g, 0.13 mol) and 1-ethynyl-4-fluorobenzene (26.4 g, 0.22 mol) in diethylamine (400 mL) was degassed with bubbling nitrogen for 20 min., then tetrakis(triphenylphosphine)palladium(0) (2.0 g, 1.7 mmol) and copper (I) iodide (170 mg, 0.9 mmol) were added and the mixture was stirred at room temperature for 12 h. The solvent was evaporated under reduced pressure, water was added and the mixture was extracted with ethyl acetate. The combined organic fractions were washed with water (2×), dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was dissolved in dimethylformamide (250 mL), calcium carbonate (13 g, 0.13 mol) and copper (I) iodide (12.4 g, 0.07 mol) were added and the mixture was stirred at 120° C. for 22 h. The mixture was cooled, filtered and the solvent was evaporated under reduced pressure. Water was added and the mixture was extracted with ethyl acetate. The combined organic fractions were washed with water (2×) and brine, dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was triturated with ether/hexane and the solid was collected and dried in vacuo to give the title compound (25.4 g, 85%). 1H NMR (360 MHz, CDCl3) δ 7.59 (2H, m), 7.49 (1H, d, J 8.5 Hz), 7.44 (1H, s), 7.24-6.99 (3H, m), and 6.69 (1H, d, J 1.8 Hz). was degassed with bubbling nitrogen for 20 min. The solvent was evaporated under reduced pressure, water was added the mixture was extracted with ethyl acetate The combined organic fractions were washed with water (2×) dried (MgSO4) the solvent was evaporated under reduced pressure The residue was dissolved in dimethylformamide (250 mL) the mixture was stirred at 120° C. for 22 h The mixture was cooled filtered the solvent was evaporated under reduced pressure Water was added the mixture was extracted with ethyl acetate The combined organic fractions were washed with water (2×) and brine dried (MgSO4) the solvent was evaporated under reduced pressure The residue was triturated with ether/hexane the solid was collected dried in vacuo

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-chloro-2-iodoaniline (14.0 g, 0.0552 mol) in dimethyl sulphoxide, ethyl acrylate (30.38 mL, 0.276 mol) and n-tributyltinhydride (22.3 mL, 0.0828 mol), AIBN (3.6 g, 0.022 mol) was added at room temperature. The reaction mixture was heated to 120° C. and stirred for 16 h. The reaction mixture was cooled to room temperature; the reaction mixture was diluted with water. The aqueous phase was extracted with ethyl acetate (3×500 mL), the combined organic layer was washed with cold water, saturated aqueous sodium chloride solution and dried over sodium sulphate, the solvent was evaporated under vacuum and the residue was purified with silica gel (60-120 mesh) silica gel column chromatography by 0-20% ethyl acetate in hexane to afford the title compound. 1H NMR (400 MHz, DMSO-d6) δ 10.13 (s, 1H), 7.17-7.15 (d, J=7.6 Hz, 1H), 6.93-6.91 (d, J=8.0 Hz, 1H), 6.85 (s, 1H), 2.85-2.81 (t, J=7.2 Hz, 2H), 2.44-2.41 (t, J=8 Hz, 2H); MS (M+1): 181.9. The reaction mixture was cooled to room temperature The aqueous phase was extracted with ethyl acetate (3×500 mL) the combined organic layer was washed with cold water, saturated aqueous sodium chloride solution dried over sodium sulphate the solvent was evaporated under vacuum the residue was purified with silica gel (60-120 mesh) silica gel column chromatography by 0-20% ethyl acetate in hexane

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 1-(4-ethynylbenzyl)-3,5-dimethyl-1H-pyrazol-4-yl-acetic acid tert.-butyl ester (4.4 g) and 5-chloro-2-iodophenylamine (3.4 g) in tetrahydrofuran (100 ml) at room temperature is added diisopropylethylamine (5.8 ml). The reaction is degassed and put under argon. Copper(I)iodide (260 mg) and bis(triphenylphosphine)palladiumdichloride (475 mg) are added. After 18 h, the reaction mixture is absorbed onto Extrelut and purified by flash chromatography (7:3 isocratic-cyclohexane:ethyl acetate) to yield a solid (4.3 g; HPLC retention time 1.66 min (Method J)). The solid (4.2 g) is dissolved in N-methyl-2-pyrrolidone (25 ml) and the solution degassed and put under argon. Potassium tert-butoxide (4.1 g) is added and the reaction is then heated to 50° C. After 15 h, further potassium tert-butoxide (1.0 g) is added. After 15 h the reaction temperature is increased to 75° C. After 3 h, the reaction mixture is allowed to cool to room temperature and a copious amount of water is added. The reaction mixture is extracted twice with ethyl acetate and the aqueous phase is acidified to pH 3 with 1M aqueous hydrochloric acid. The resultant precipitate is filtered off and triturated with hot acetonitrile to yield (1-[4-(6-Chloro-1H-indol-2-yl)-benzyl]-3,5-dimethyl-1H-pyrazol-4-yl)-acetic acid (2.0 g; [M+H]=394; HPLC retention time 1.51 min (Method E)). The reaction is degassed Copper(I)iodide (260 mg) and bis(triphenylphosphine)palladiumdichloride (475 mg) are added the reaction mixture is absorbed onto Extrelut purified by flash chromatography (7:3 isocratic-cyclohexane:ethyl acetate) to yield a solid (4.3 g; HPLC retention time 1.66 min (Method J)) the solution degassed Potassium tert-butoxide (4.1 g) is added After 15 h further potassium tert-butoxide (1.0 g) is added After 15 h the reaction temperature is increased to 75° C After 3 h to cool to room temperature a copious amount of water is added The reaction mixture is extracted twice with ethyl acetate The resultant precipitate is filtered off triturated with hot acetonitrile

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 5-Chloro-2-iodoaniline (5.8 g, 23 mmol) and pyruvic acid (8 mL, 115 mmol) were dissolved in DMF (100 mL). DABCO (12.8 g, 115 mmol) was added and N2 (g) was bubbled through solution for 20 minutes, then palladium acetate (1.03 g, 4.6 mmol) was added. The reaction was heated to 110° C. for 1 hour then submitted to aqueous workup and purified by silica gel chromatography (0-100% EtOAc in hexanes) to yield the title compound. N2 (g) was bubbled through solution for 20 minutes purified by silica gel chromatography (0-100% EtOAc in hexanes)

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

Procedure: A mixture of 5-chloro-2-iodoaniline (33.0 g, 0.13 mol) and 1-ethynyl-4-fluorobenzene (26.4 g, 0.22 mol) in diethylamine (400 mL) was degassed with bubbling nitrogen for 20 min., then tetrakis(triphenylphosphine)palladium(0) (2.0 g, 1.7 mmol) and copper (I) iodide (170 mg, 0.9 mmol) were added and the mixture was stirred at room temperature for 12 h. The solvent was evaporated under reduced pressure, water was added and the mixture was extracted with ethyl acetate. The combined organic fractions were washed with water (2×), dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was dissolved in dimethylformamide (250 mL), calcium carbonate (13 g, 0.13 mol) and copper (I) iodide (12.4 g, 0.07 mol) were added and the mixture was stirred at 120° C. for 22 h. The mixture was cooled, filtered and the solvent was evaporated under reduced pressure. Water was added and the mixture was extracted with ethyl acetate. The combined organic fractions were washed with water (2×) and brine, dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was triturated with ether/hexane and the solid was collected and dried in vacuo to give the title compound (25.4 g, 85%). 1H NMR (360 MHz, CDCl3) δ 7.59 (2H, m), 7.49 (1H, d, J 8.5 Hz), 7.44 (1H, s), 7.24-6.99 (3H, m), and 6.69 (1H, d, J 1.8 Hz). was degassed with bubbling nitrogen for 20 min. The solvent was evaporated under reduced pressure, water was added the mixture was extracted with ethyl acetate The combined organic fractions were washed with water (2×) dried (MgSO4) the solvent was evaporated under reduced pressure The residue was dissolved in dimethylformamide (250 mL) the mixture was stirred at 120° C. for 22 h The mixture was cooled filtered the solvent was evaporated under reduced pressure Water was added the mixture was extracted with ethyl acetate The combined organic fractions were washed with water (2×) and brine dried (MgSO4) the solvent was evaporated under reduced pressure The residue was triturated with ether/hexane the solid was collected dried in vacuo