反应详情

L-Lactic acid (25.9 μl, 0.29 mmol), 1-hydroxybenzotriazole monohydrate (37.6 mg, 0.25 mmol), 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride (70.5 mg, 0.37 mmol), and triethylamine (51.3 μl, 0.37 mmol) were added to an N,N-dimethylformamide solution (2.0 ml) of 5-{9-isobutyl-8-[(3R)-3-methylpiperazin-1-yl]-6-morpholin-4-yl-9H-purin-2-yl}pyrimidin-2-amine (111.0 mg, 0.25 mmol) at room temperature. The resulting mixture was stirred for 2 days followed by the addition of L-lactic acid (25.9 μl, 0.29 mmol), 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride (70.5 mg, 0.37 mmol), and triethylamine (51.3 μl, 0.37 mmol). The resulting mixture was stirred for 25 hours and the reaction mixture was poured into methylene chloride-methanol (10:1), washed with saturated aqueous sodium hydrogen carbonate solution, and dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure and the resulting residue was dissolved in methylene chloride (3.0 ml) followed by the addition of L-lactic acid (25.9 μl, 0.29 mmol), 1-hydroxybenzotriazole monohydrate (37.6 mg, 0.25 mmol), 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride (70.5 mg, 0.37 mmol), and triethylamine (51.3 μl, 0.37 mmol) at room temperature. The resulting mixture was stirred for 18 hours and then the reaction mixture was poured into methylene chloride-methanol (10:1), washed with saturated aqueous sodium hydrogen carbonate solution, and dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure and the resulting residue was purified by preparative thin layer silica gel chromatography (methylene chloride:methanol=10:1) to give the title compound (64.8 mg, 50%) as a pale yellow solid.

1. stirringThe resulting mixture was stirred for 25 hours
2. washwashed with saturated aqueous sodium hydrogen carbonate solution
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationAfter filtration
5. concentrationthe filtrate was concentrated under reduced pressure
6. dissolutionthe resulting residue was dissolved in methylene chloride (3.0 ml)
7. stirringThe resulting mixture was stirred for 18 hours
8. washwashed with saturated aqueous sodium hydrogen carbonate solution
9. dry with materialdried over anhydrous sodium sulfate
10. filtrationAfter filtration
11. concentrationthe filtrate was concentrated under reduced pressure
12. customthe resulting residue was purified by preparative thin layer silica gel chromatography (methylene chloride:methanol=10:1)