tert-butyl 2-amino-2-methylpropanoate;hydrochloride

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

Procedure: A solution of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (100 mg, 0.323 mmol), tert-butyl 2-amino-2-methylpropanoate hydrochloride (82 mg, 0.42 mmol), HATU (160 mmol, 0.42 mmol) and DIPEA (66 mg, 0.51 mmol) in 6 mL of DMF was stirred at room temperature for 16 hours. The solvent was evaporated at 70° C. under reduced pressure and the residue was purified by column chromatography (silica gel, 200-300 mesh, eluting with a mixture of petroleum ether and ethyl acetate (1:1, v/v) to give tert-butyl 2-(2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamido)-2-methylpropanoate (75 mg, 51.8%) as a white solid. MS: (M+H)+=453; 1H NMR (300 MHz, DMSO): δ 13.93 (s, 1H), 9.13 (s, 1H), 8.57-8.52 (m, 1H), 8.48 (s, 1H), 8.30 (s, 1H), 7.72 (dd, 1H, J=9.8, 2.1 Hz), 7.21-7.15 (m, 1H), 4.18 (s, 3H), 1.63 (s, 6H), 1.25 (s, 9H). The solvent was evaporated at 70° C. under reduced pressure the residue was purified by column chromatography (silica gel, 200-300 mesh eluting with a mixture of petroleum ether and ethyl acetate (1:1

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

Procedure: To a solution of 300 mg 4-Hydroxy-benzo[b]thiophene-5-carboxylic acid in 5 ml N,N-dimethylformamide were added 42 mg 1-hydroxy-benzotriaziole and 285 mg 2-amino-2-methyl-propionic acid tert-butyl ester hydrochloride. At 0° C. 0.77 ml (600 mg) ethyl-diisopropyl-amine and 444 mg (3-dimethylamino-propyl)-ethyl-carbodiimide hydrochloride were added. After 16 h at room temperature 0.51 ml (400 mg) ethyl-diisopropyl-amine and 444 mg (3-dimethylamino-propyl)-ethyl-carbodiimide hydrochloride were added, and after additional 16 h the reaction was diluted with ethyl acetate and washed with brine. The organic layer was dried over magnesium sulphate and concentrated. The resulting residue was purified by flash chromatography (silica, heptane/ethyl acetate) to afford 315 mg 2-[(4-hydroxy-benzo[b]thiophene-5-carbonyl)-amino]-2-methyl-propionic acid tert-butyl ester. At 0° C washed with brine The organic layer was dried over magnesium sulphate concentrated The resulting residue was purified by flash chromatography (silica, heptane/ethyl acetate)

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

Procedure: To a solution of 300 mg 4-Hydroxy-benzo[b]thiophene-5-carboxylic acid in 5 ml N,N-dimethylformamide were added 42 mg 1-hydroxy-benzotriaziole and 285 mg 2-amino-2-methyl-propionic acid tert-butyl ester hydrochloride. At 0° C. 0.77 ml (600 mg) ethyl-diisopropyl-amine and 444 mg (3-dimethylamino-propyl)-ethyl-carbodiimide hydrochloride were added. After 16 h at room temperature 0.51 ml (400 mg) ethyl-diisopropyl-amine and 444 mg (3-dimethylamino-propyl)-ethyl-carbodiimide hydrochloride were added, and after additional 16 h the reaction was diluted with ethyl acetate and washed with brine. The organic layer was dried over magnesium sulphate and concentrated. The resulting residue was purified by flash chromatography (silica, heptane/ethyl acetate) to afford 315 mg 2-[(4-hydroxy-benzo[b]thiophene-5-carbonyl)-amino]-2-methyl-propionic acid tert-butyl ester. At 0° C washed with brine The organic layer was dried over magnesium sulphate concentrated The resulting residue was purified by flash chromatography (silica, heptane/ethyl acetate)

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

Procedure: A solution of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (100 mg, 0.323 mmol), tert-butyl 2-amino-2-methylpropanoate hydrochloride (82 mg, 0.42 mmol), HATU (160 mmol, 0.42 mmol) and DIPEA (66 mg, 0.51 mmol) in 6 mL of DMF was stirred at room temperature for 16 hours. The solvent was evaporated at 70° C. under reduced pressure and the residue was purified by column chromatography (silica gel, 200-300 mesh, eluting with a mixture of petroleum ether and ethyl acetate (1:1, v/v) to give tert-butyl 2-(2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamido)-2-methylpropanoate (75 mg, 51.8%) as a white solid. MS: (M+H)+=453; 1H NMR (300 MHz, DMSO): δ 13.93 (s, 1H), 9.13 (s, 1H), 8.57-8.52 (m, 1H), 8.48 (s, 1H), 8.30 (s, 1H), 7.72 (dd, 1H, J=9.8, 2.1 Hz), 7.21-7.15 (m, 1H), 4.18 (s, 3H), 1.63 (s, 6H), 1.25 (s, 9H). The solvent was evaporated at 70° C. under reduced pressure the residue was purified by column chromatography (silica gel, 200-300 mesh eluting with a mixture of petroleum ether and ethyl acetate (1:1

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

Procedure: To a solution of 300 mg 4-Hydroxy-benzo[b]thiophene-5-carboxylic acid in 5 ml N,N-dimethylformamide were added 42 mg 1-hydroxy-benzotriaziole and 285 mg 2-amino-2-methyl-propionic acid tert-butyl ester hydrochloride. At 0° C. 0.77 ml (600 mg) ethyl-diisopropyl-amine and 444 mg (3-dimethylamino-propyl)-ethyl-carbodiimide hydrochloride were added. After 16 h at room temperature 0.51 ml (400 mg) ethyl-diisopropyl-amine and 444 mg (3-dimethylamino-propyl)-ethyl-carbodiimide hydrochloride were added, and after additional 16 h the reaction was diluted with ethyl acetate and washed with brine. The organic layer was dried over magnesium sulphate and concentrated. The resulting residue was purified by flash chromatography (silica, heptane/ethyl acetate) to afford 315 mg 2-[(4-hydroxy-benzo[b]thiophene-5-carbonyl)-amino]-2-methyl-propionic acid tert-butyl ester. At 0° C washed with brine The organic layer was dried over magnesium sulphate concentrated The resulting residue was purified by flash chromatography (silica, heptane/ethyl acetate)

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

Procedure: 2.63 g (12.3 mmol) 5-bromo-thiophene-2-carboxylic acid are refluxed in 15 ml dichloromethane together with 7.0 ml of thionyl chloride for 2 h with stirring. The mixture is then evaporated down i. vac. and the residue is twice taken up in toluene and evaporated down completely i. vac. The residue is added dropwise to 10 ml dichloromethane with stirring at ambient temperature in a mixture of 2.41 g (12.3 mmol) tert.-butyl 2-amino-isobutyrate hydrochloride in 20 ml dichloromethane with 5.14 ml (36.9 mmol) TEA and stirred for 16 h. The mixture is poured into water and extracted with dichloromethane, the combined organic phases are dried over magnesium sulphate and evaporated down i. vac. The mixture is then evaporated down i evaporated down completely The residue is added dropwise to 10 ml dichloromethane stirred for 16 h extracted with dichloromethane the combined organic phases are dried over magnesium sulphate evaporated down i

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

Procedure: 2.63 g (12.3 mmol) 5-bromo-thiophene-2-carboxylic acid are refluxed in 15 ml dichloromethane together with 7.0 ml of thionyl chloride for 2 h with stirring. The mixture is then evaporated down i. vac. and the residue is twice taken up in toluene and evaporated down completely i. vac. The residue is added dropwise to 10 ml dichloromethane with stirring at ambient temperature in a mixture of 2.41 g (12.3 mmol) tert.-butyl 2-amino-isobutyrate hydrochloride in 20 ml dichloromethane with 5.14 ml (36.9 mmol) TEA and stirred for 16 h. The mixture is poured into water and extracted with dichloromethane, the combined organic phases are dried over magnesium sulphate and evaporated down i. vac. The mixture is then evaporated down i evaporated down completely The residue is added dropwise to 10 ml dichloromethane stirred for 16 h extracted with dichloromethane the combined organic phases are dried over magnesium sulphate evaporated down i

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

Procedure: Compound 223.1 was prepared by the process as described for 1.1 by reaction of 223.3 with tert-butyl 2-amino-2-methylpropionate hydrochloride and phosgene (solution in toluene). 1H NMR: 8.73, s, 1H; 8.09, d, 1H, 7.75, s, 1H, 7.69, d, 1H, 7.62-7.5, m, 5H, 1.42, s, 6H.

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

Procedure: In the synthesis of the compound of example 160, the procedure was as in the preparation of the compound of example 158: 2-methyl-4-nitrobenzonitrile was reduced with hydriodic acid (analogously to the procedure for the synthesis of compound 63.4) to 4-amino-2-methylbenzonitrile (160.3; 1H NMR: 7.3, d, 1H, 6.48, s, 1H, 6.42, d, 1H, 6.02, s, 2H; 227, s, 3H). The aniline 160.3 was converted with standard methods using tert-butyl 2-amino-2-methylpropionate hydrochloride and phosgene (solution in toluene) to compound 160.1 (4-(4,4-dimethyl-2,5-dioxoimidazolidin-1-yl)-2-methylbenzonitrile; 1H NMR: 8.7, s, 1H, 7.88, d, 1H, 7.55, s, 1H; 7.44, d, 1H, 1.4, s, 3H), which was in turn reacted with 2-bromo-1-bromomethyl-4-fluorobenzene to give 160.2 (4-[3-(2-bromo-4-fluorobenzyl)-4,4-dimethyl-2,5-dioxoimidazolidin-1-yl]-2-methylbenzonitrile; molecular weight 429.04 (C20H17BrFN3O2);

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

Procedure: In the synthesis of the compound of example 160, the procedure was as in the preparation of the compound of example 158: 2-methyl-4-nitrobenzonitrile was reduced with hydriodic acid (analogously to the procedure for the synthesis of compound 63.4) to 4-amino-2-methylbenzonitrile (160.3; 1H NMR: 7.3, d, 1H, 6.48, s, 1H, 6.42, d, 1H, 6.02, s, 2H; 227, s, 3H). The aniline 160.3 was converted with standard methods using tert-butyl 2-amino-2-methylpropionate hydrochloride and phosgene (solution in toluene) to compound 160.1 (4-(4,4-dimethyl-2,5-dioxoimidazolidin-1-yl)-2-methylbenzonitrile; 1H NMR: 8.7, s, 1H, 7.88, d, 1H, 7.55, s, 1H; 7.44, d, 1H, 1.4, s, 3H), which was in turn reacted with 2-bromo-1-bromomethyl-4-fluorobenzene to give 160.2 (4-[3-(2-bromo-4-fluorobenzyl)-4,4-dimethyl-2,5-dioxoimidazolidin-1-yl]-2-methylbenzonitrile; molecular weight 429.04 (C20H17BrFN3O2);

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

Procedure: In the synthesis of the compound of example 160, the procedure was as in the preparation of the compound of example 158: 2-methyl-4-nitrobenzonitrile was reduced with hydriodic acid (analogously to the procedure for the synthesis of compound 63.4) to 4-amino-2-methylbenzonitrile (160.3; 1H NMR: 7.3, d, 1H, 6.48, s, 1H, 6.42, d, 1H, 6.02, s, 2H; 227, s, 3H). The aniline 160.3 was converted with standard methods using tert-butyl 2-amino-2-methylpropionate hydrochloride and phosgene (solution in toluene) to compound 160.1 (4-(4,4-dimethyl-2,5-dioxoimidazolidin-1-yl)-2-methylbenzonitrile; 1H NMR: 8.7, s, 1H, 7.88, d, 1H, 7.55, s, 1H; 7.44, d, 1H, 1.4, s, 3H), which was in turn reacted with 2-bromo-1-bromomethyl-4-fluorobenzene to give 160.2 (4-[3-(2-bromo-4-fluorobenzyl)-4,4-dimethyl-2,5-dioxoimidazolidin-1-yl]-2-methylbenzonitrile; molecular weight 429.04 (C20H17BrFN3O2);

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

Procedure: Compound 158.1 was prepared by the process as described for 1.1 by reaction of 158.3 with tert-butyl 2-amino-2-methylpropionate hydrochloride and phosgene (solution in toluene). Molecular weight 269.11 (C15H15N3O2); retention time Rt=1.43 min. [B]; MS (ESI): 270.18 (MH+).