Ethylenediamine → 2-(6-Chloro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((R)-1-methyl-3-oxo-3-pyrrolidin-1-yl-propyl)-amide

関与物質

反応手順

To a solution of 2-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((R)-1-methyl-3-oxo-3-pyrrolidin-1-yl-propyl)-amide (125 mg, 0.21 mmol) in CH2Cl2 (2 mL) was added TFA (0.5 mL, 6.49 mmol). The yellow reaction mixture was stirred at room temperature for 3 h then concentrated. The residue was redissolved in CH2Cl2 (2 mL) and ethylenediamine (0.4 mL, 6.0 mmol) was added. The reaction mixture was stirred at room temperature for 1 h then quenched with water. The resultant precipitate was collected via filtration and washed with water and EtOAc. The solid was dissolved in 10% MeOH/CH2Cl2 and washed with water. The aqueous layer was back-extracted with CH2Cl2. The combined organics were dried over MgSO4 and concentrated to afford 64 mg (66%) of 2-(6-Chloro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((R)-1-methyl-3-oxo-3-pyrrolidin-1-yl-propyl)-amide as an off-white solid. MS: (M+H)+=466; 1H NMR (DMSO-d6, 300 MHz): δ (ppm) 9.07 (s, 1H), 8.57 (d, J=8.7 Hz, 1H), 8.41 (s, 1H), 8.26 (d, J=7.9 Hz, 1H), 7.97 (d, J=1.1 Hz, 1H), 7.28 (dd, J=8.7, 1.5 Hz, 1H), 4.36-4.54 (m, 1H), 4.16 (s, 3H), 3.40 (t, J=6.6 Hz, 2H), 3.10-3.25 (m, 2H), 2.52-2.76 (m, 2H), 1.61-1.90 (m, 4H), 1.38 (d, J=6.8 Hz, 3H).

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