2-amino-2-methylpropanenitrile

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 stirred solution of 6.3 grams of 2,4,6-trichloro-5-pyrimidinecarbonitrile in 25 ml of acetone was cooled to -10°, and 2.5 grams of 2-amino-2-methylpropionitrile was added. With the reaction mixture at -10°, a solution of 1.3 grams of sodium hydroxide in 3.5 ml of water was added dropwise. Upon complete addition, the reaction mixture was stirred at -10° for 30 minutes. The acetone was removed under reduced pressure; the residue was extracted with diethyl ether, and the extract was separated and dried over magnesium sulfate. The extract was filtered, and the filtrate was evaporated under reduced pressure, yielding a residue. The residue was recrystallized from methylcyclohexane to give 3.1 grams of 4,6-dichloro-2-(1-cyano-1-methylethylamino)-5-pyrimidinecarbonitrile; mp, 154-158°. Upon complete addition The acetone was removed under reduced pressure the residue was extracted with diethyl ether the extract was separated dried over magnesium sulfate The extract was filtered the filtrate was evaporated under reduced pressure yielding a residue The residue was recrystallized from methylcyclohexane

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

Procedure: A mixed solution of 2-amino-2-methylpropanenitrile (41.4 g, 492 mmol) and 1,7-dichloro-4-heptanone (30.0 g, 164 mmol) in 220 ml of 16% NH3 /MeOH solution was stirred for 24 hours at 20° C. The resulting reaction mixture was concentrated in vacuo to remove MeOH therefrom, added 0.1N NaOH to the residue, which was extracted with methylene chloride, and the extract was dried over anhydrous sodium sulfate, concentrated, and distilled in vacuo to afford 18.1 g of the desired compound (Yield: 82%). The resulting reaction mixture was concentrated in vacuo to remove MeOH added 0.1N NaOH to the residue, which was extracted with methylene chloride the extract was dried over anhydrous sodium sulfate concentrated distilled in vacuo

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

Procedure: In a nitrogen atmosphere, 24.8 g. (0.3 mole) 2-methyl-2-aminopropionitrile and 30.7 g. (0.3 mole) t-butyl isocyanate, 97%, are combined and stirred for 5 minutes. At the end of this period, the mixture is filtered and 1 ml. of pyridine is added to the filtrate. This mixture is heated in an oil bath for one and one-half hours, keeping the temperature of the bath below 70°. The solid is recrystallized from methanol:water, 60:40, to give N-(1-cyano-1-methylethyl)-N'-(1,1-dimethylethyl)urea, m.p. 204°-5°; Anal. Calcd. for C9H17N3O; C: 58.99, H: 9.35, N: 22.93; Found: C: 59.21, H: 9.26, N: 22.59. At the end of this period, the mixture is filtered of pyridine is added to the filtrate This mixture is heated in an oil bath for one and one-half hours the temperature of the bath below 70° The solid is recrystallized from methanol

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

Procedure: In a nitrogen atmosphere, 24.8 g. (0.3 mole) 2-methyl-2-aminopropionitrile and 30.7 g. (0.3 mole) t-butyl isocyanate, 97%, are combined and stirred for 5 minutes. At the end of this period, the mixture is filtered and 1 ml. of pyridine is added to the filtrate. This mixture is heated in an oil bath for one and one-half hours, keeping the temperature of the bath below 70°. The solid is recrystallized from methanol:water, 60:40, to give N-(1-cyano-1-methylethyl)-N'-(1,1-dimethylethyl)urea, m.p. 204°-5°; Anal. Calcd. for C9H17N3O; C: 58.99, H: 9.35, N: 22.93; Found: C: 59.21, H: 9.26, N: 22.59. At the end of this period, the mixture is filtered of pyridine is added to the filtrate This mixture is heated in an oil bath for one and one-half hours the temperature of the bath below 70° The solid is recrystallized from methanol

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

Procedure: A mixture of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxylic acid (60 mg, 0.193 mmol), 2-amino-2-methylpropanenitrile (25 mg, 0.29 mmol), HATU (217 mg, 0.57 mmol) and DIEA (74 mg, 0.57 mmol) in DMF (3 mL) was stirred at room temperature for 16 hours. Then the mixture was filtered and the cake was washed with DMSO and MeOH to give N-(2-cyanopropan-2-yl)-2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxamide (15 mg, 20.5%) as light yellow solid. MS: (M+H)+=400; 1H NMR (300 MHz, DMSO): δ 13.03 (s, 1H), 9.13 (s, 1H), 8.58 (s, 1H), 8.54-8.50 (m, 1H), 8.35 (s, 1H), 7.32-7.69 (m, 1H), 7.23-7.22 (m, 1H), 4.17 (s, 3H), 1.88 (s, 6H). Then the mixture was filtered the cake was washed with DMSO and MeOH

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

Procedure: A mixture of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxylic acid (60 mg, 0.193 mmol), 2-amino-2-methylpropanenitrile (25 mg, 0.29 mmol), HATU (217 mg, 0.57 mmol) and DIEA (74 mg, 0.57 mmol) in DMF (3 mL) was stirred at room temperature for 16 hours. Then the mixture was filtered and the cake was washed with DMSO and MeOH to give N-(2-cyanopropan-2-yl)-2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxamide (15 mg, 20.5%) as light yellow solid. MS: (M+H)+=400; 1H NMR (300 MHz, DMSO): δ 13.03 (s, 1H), 9.13 (s, 1H), 8.58 (s, 1H), 8.54-8.50 (m, 1H), 8.35 (s, 1H), 7.32-7.69 (m, 1H), 7.23-7.22 (m, 1H), 4.17 (s, 3H), 1.88 (s, 6H). Then the mixture was filtered the cake was washed with DMSO and MeOH

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

Procedure: The title compound was synthesized in analogy to Example 1, using 5-cyclopropyl-6-cyclopropylmethoxy-pyridine-2-carboxylic acid (Example 42 a) and 2-amino-2-methyl-propanenitrile, (CAN 19355-69-2) as starting materials, LC-MS (UV peak area/ESI) 89%, 300.1702 (M+H)+.

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1 ml of triethylamine was added to a mixture of 49.6g of 3-trifluoromethyl-4-nitrophenyl isocyanate in 500 ml of tetrahydrofuran and then 18 g of 2-amino-2-cyanopropane were rapidly added thereto. The mixture was stirred for 72 hours at 20° C and was evaporated to dryness under reduced pressure. The residue was chromatographed over silica gel and was eluted with an 8-2 methylene chloride-acetone mixture to obtain 27 g of 1-(3'-trifluoromethyl-4'-nitrophenyl)-4,4 -dimethyl-5-imino-imidazoline-2-one melting at 168° C. was evaporated to dryness under reduced pressure The residue was chromatographed over silica gel was eluted with an 8-2 methylene chloride-acetone mixture