反应详情

温度

23 °C

To a solution of 4-[2-(3-chloro-phenyl)-2(S)-hydroxy-ethylamino]-3-(6-methyl-2-piperazin-1-yl-9H-purin-8-yl)-1H-pyridin-2-one (20 mg, 0.042 mmol) in a mixture of THF:DMF (1.5 mL:0.5 mL) was added glacial acetic acid (2.3 μl, 0.042 mmol) and 2-methylbutyraldehyde (12 μl, 0.117 mmol). The reaction mixture was stirred at 23° C. for 3 hours followed by the addition of NaBH(OAc)3 (24.9 mg, 0.117 mmol) to the reaction mixture and stirred for an additional 18 hours. MeOH (0.5 mL) was added and the solution was passed through a SCX cartridge (1 g, 0.79 meq/g, varian). The cartridge was eluted with MeOH (16 mL) and with 2N ammonia in MeOH (16 mL). The ammonia solution was evaporated in vacuo and the solid obtained was purified using a Shimadzu automated preparative HPLC System with the method described below. The solution was evaporated on a Savant Speedvac system to give the title compound as a light yellow solid. (14.2 mg, 62%). HPLC 95%; LCMS (+ESI, M+H+) m/z 551; IR (KBr, cm−1) 3403, 2958, 1645, 1616, 1496, 1233; 1H NMR (400 MHz, DMSO+D2O) δ 10.78 (brs, 1H), 7.60-7.29 (m, 5H), 6.22 (m, 1H), 4.97 (m, 1H), 3.80-3.55 (m, 6H), 2.52-2.15 (m, 8H), 1.75 (brs, 1H), 1.41 (brs, 1H), 1.15 (m, 1H) 0.86 (m, 6H). Preparative HPLC Method:

1. stirringstirred for an additional 18 hours
2. washThe cartridge was eluted with MeOH (16 mL) and with 2N ammonia in MeOH (16 mL)
3. customThe ammonia solution was evaporated in vacuo
4. customthe solid obtained
5. customwas purified
6. customThe solution was evaporated on a Savant Speedvac system