反应详情

To a solution of 1-[2-(benzimidazol-2-ylsulfonyl)ethyl]piperazine (17 mg, 0.058 mmol) in DMF (0.1 ml) were added potassium carbonate (16.0 mg, 0.116 mmol) and 2-bromo-N-[2,4-bis(methylthio)-6-methyl-3-pyridyl]acetamide (18.6 mg, 0.058 mmol), and the mixture was stirred at room temperature for 6 hours. The reaction solution was diluted with water and extracted with ethyl acetate. The organic layer was washed with water and a saturated sodium chloride solution, dried over anhydrous sodium sulfate and concentrated in vacuo. The resulting residue was purified by a silica gel preparative thin layer chromatography (developing solvent; chloroform:sat. ammonia methanol=5:1) to provide 19.8 mg (yield 64%) of the desired compound as pale yellow oil. IR (neat) cm−1: 3345, 1672, 1565, 1420, 1124. 1H-NMR (CD3OD) δ: 2.43 (3H, s), 2.47 (3H, s), 2.48 (3H, s), 3.00 (2H, br. d, J=12.9 Hz), 3.12 (2H, t, J=10.7 Hz), 3.34 (2H, s), 3.58-3.78 (8H, m), 6.85 (1H, s), 7.12-7.18 (2H, m), 7.43-7.48 (2H, m).

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with water
3. dry with materiala saturated sodium chloride solution, dried over anhydrous sodium sulfate
4. concentrationconcentrated in vacuo
5. customThe resulting residue was purified by a silica gel preparative thin layer chromatography (developing solvent; chloroform:sat. ammonia methanol=5:1)