4-[3-(dimethylamino)propoxy]-5-fluorobenzene-1,2-diamine

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

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

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3.4 g of 4-nitro-1-(tetrahydropyran-2-yl)-1H-pyrazole-3-carbaldehyde are added to a solution of 3.5 g of 4-(3-dimethylaminopropoxy)-5-fluorobenzene-1,2-diamine in 150 mL of methanol. The reaction medium is stirred at 22° C. for 18 hours. After evaporation, the reaction crude is purified by flash chromatography on an Intelliflash apparatus on an Analogix RS-330 cartridge. The elution is carried out in dichloromethane with 10% of methanol. 2.3 g of (3-{6-fluoro-2-[4-nitro-1-(tetrahydropyran-2-yl)-1H-pyrazol-3-yl]-3H-benzimidazol-5-yloxy}-propyl)dimethylamine are isolated. 1H NMR (300 MHz, DMSO-d6, δ in ppm): 1.50 to 2.23 (m, 8H); 2.80 (s, 6H); 3.23 (m, 2H); 3.68 (m, 1H); 3.98 (m, 1H); 4.17 (t, J=6.0 Hz, 2H); 5.58 (dd, J=2.5 and 9.5 Hz, 1H); 7.34 (d, J=8.0 Hz, 1H); 7.49 (d, J=11.0 Hz, 1H) 9.11 (s, 1H). After evaporation the reaction crude is purified by flash chromatography on an Intelliflash apparatus on an Analogix RS-330 cartridge The elution

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

Procedure: 3.8 g of 5-(3-dimethylaminopropoxy)-4-fluoro-2-nitrophenylamine in solution in 100 mL of methanol are hydrogenated under 1 bar of hydrogen pressure in the presence of 400 mg of palladium-on-charcoal at 25° C. for 16 hours. The reaction crude is filtered through celite and the filtrate is concentrated under vacuum in a rotary evaporator. 3.5 g of 4-(3-dimethylaminopropoxy)-5-fluorobenzene-1,2-diamine are isolated in the form of a black oil. 1H NMR (400 MHz, DMSO-d6, δ in ppm): 1.75 (m, 2H); 2.13 (m, 6H); 2.32 (m, 2H); 3.84 (m, 2H); 4.3 (m, 4H); 6.32 (m, 2H). The reaction crude is filtered through celite the filtrate is concentrated under vacuum in a rotary evaporator

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

Procedure: 3.8 g of 5-(3-dimethylaminopropoxy)-4-fluoro-2-nitrophenylamine in solution in 100 mL of methanol are hydrogenated under 1 bar of hydrogen pressure in the presence of 400 mg of palladium-on-charcoal at 25° C. for 16 hours. The reaction crude is filtered through celite and the filtrate is concentrated under vacuum in a rotary evaporator. 3.5 g of 4-(3-dimethylaminopropoxy)-5-fluorobenzene-1,2-diamine are isolated in the form of a black oil. 1H NMR (400 MHz, DMSO-d6, δ in ppm): 1.75 (m, 2H); 2.13 (m, 6H); 2.32 (m, 2H); 3.84 (m, 2H); 4.3 (m, 4H); 6.32 (m, 2H). The reaction crude is filtered through celite the filtrate is concentrated under vacuum in a rotary evaporator

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

Procedure: 3.8 g of 5-(3-dimethylaminopropoxy)-4-fluoro-2-nitrophenylamine in solution in 100 mL of methanol are hydrogenated under 1 bar of hydrogen pressure in the presence of 400 mg of palladium-on-charcoal at 25° C. for 16 hours. The reaction crude is filtered through celite and the filtrate is concentrated under vacuum in a rotary evaporator. 3.5 g of 4-(3-dimethylaminopropoxy)-5-fluorobenzene-1,2-diamine are isolated in the form of a black oil. 1H NMR (400 MHz, DMSO-d6, δ in ppm): 1.75 (m, 2H); 2.13 (m, 6H); 2.32 (m, 2H); 3.84 (m, 2H); 4.3 (m, 4H); 6.32 (m, 2H). The reaction crude is filtered through celite the filtrate is concentrated under vacuum in a rotary evaporator

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

Procedure: Stir, at room temperature under argon, a mixture of 100 mg of (4-formyl-9H-fluoren-9(R,S)-yl)amide of 1H-pyrrolo[2,3-b]pyridine-4-carboxylic acid, prepared as in Example 234, 65 mg of 4-(3-dimethylaminopropoxy)-5-fluorobenzene-1,2-diamine, prepared in the previous stage, and 46 mg of ferric trichloride in 5 ml of anhydrous dimethylformamide. After 48 hours, evaporate the reaction medium to dryness and then purify the residue by flash chromatography on silica gel (20-40 μm), eluting with a mixture of dichloromethane and ammonia as a 7N solution in methanol (95/5 then 9/1 by volume). In this way, we obtain 42 mg of {4-[6-(3-dimethylaminopropoxy)-5-fluoro-1H-benzimidazol-2-yl]-9H-fluoren-9(R,S)-yl}amide 1H-pyrrolo[2,3-b]-pyridine-4-carboxylic acid, in the form of a yellow solid with the following characteristics: evaporate the reaction medium to dryness purify the residue by flash chromatography on silica gel (20-40 μm) eluting with a mixture of dichloromethane and ammonia as a 7N solution in methanol (95/5

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

Procedure: In a 25 ml autoclave, dissolve 350 mg of 5-(3-dimethylaminopropoxy)-4-fluoro-2-nitrophenylamine, obtained in the previous stage, in 20 ml of ethanol, add 40 mg of 10% palladium-on-charcoal and then subject to an initial hydrogen pressure of 1 bar at 20° C. for 16 hours. After cooling, the volume of hydrogen absorbed is 123 ml. After filtration of the catalyst and then concentration to dryness under reduced pressure, we obtain 280 mg of 4-(3-dimethylaminopropoxy)-5-fluorobenzene-1,2-diamine, in the form of a viscous black oil, which is used as it is in the following stage, with the following characteristic: After cooling the volume of hydrogen absorbed After filtration of the catalyst concentration to dryness under reduced pressure, we