反应详情

To a solution of 2-{6-chloro-1-[2-(tetrahydro-pyran-2-yloxy)-ethyl]-1H-indazol-3-yl}-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide (138 mg, 0.20 mmol) in CH2Cl2 (2 mL) was added TFA (0.75 mL). The reaction mixture was stirred at room temperature for 6 h then concentrated. The residue was redissolved in 10:90:0.5 MeOH/CH2Cl2/NH4OH (3 mL) and stirred at room temperature for 3 h. The reaction mixture was concentrated and the residue was purified by silica gel chromatography with 0% to 10% MeOH/CH2Cl2 to afford 63 mg (65%) of 2-[6-chloro-1-(2-hydroxy-ethyl)-1H-indazol-3-yl]-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide as a white solid. MS: (M+Na)+=515; mp=225-250° C.; 1H NMR (DMSO-d6, 300 MHz): δ (ppm) 12.92 (br. s., 1H), 9.14 (s, 1H), 8.69 (d, J=8.7 Hz, 1H), 8.47 (d, J=7.2 Hz, 2H), 7.95 (d, J=1.5 Hz, 1H), 7.24 (d, J=8.7 Hz, 1H), 4.92 (t, J=5.5 Hz, 1H), 4.49-4.78 (m, 5H), 4.17-4.27 (m, 1H), 4.05-4.15 (m, 1H), 3.83-3.93 (m, 3H), 1.39 (dd, J=6.6, 4.7 Hz, 3H).

1. concentrationthen concentrated
2. dissolutionThe residue was redissolved in 10:90:0.5 MeOH/CH2Cl2/NH4OH (3 mL)
3. stirringstirred at room temperature for 3 h
4. concentrationThe reaction mixture was concentrated
5. customthe residue was purified by silica gel chromatography with 0% to 10% MeOH/CH2Cl2