Dimethylformamide → 5-{2-Amino-6-[3-(3-tert-butoxycarbonylaminopropoxy)phenylsulfanyl]pyrimidin-4-yl}-2-methoxy-4-methylbenzoic acid methyl ester

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Reaction Steps

5-[2-Amino-6-(3-hydroxyphenylsulfanyl)pyrimidin-4-yl]-2-methoxy-4-methylbenzoic acid methyl ester (80 mg, 0.2 mmol) obtained in Step 1 above, cesium carbonate (124 mg, 0.38 mmol), and N,N-dimethylformamide (1.0 ml) were added to a reaction vessel. Then 3-bromopropylcarbamic acid tert-butyl ester (100 mg, 0.42 mmol) was added to the mixture. The mixture was stirred at room temperature for 37 hours. The reaction solution was diluted with ethyl acetate (100 ml), and sequentially washed twice with a saturated aqueous ammonium chloride solution (50 ml), twice with water (50 ml), and with a saturated aqueous sodium chloride solution (50 ml). The washed ethyl acetate solution was dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure. The resulting crude product was purified by silica gel column chromatography (developing solvent: ethyl acetate) to yield 5-{2-amino-6-[3-(3-tert-butoxycarbonylaminopropoxy)phenylsulfanyl]pyrimidin-4-yl}-2-methoxy-4-methylbenzoic acid methyl ester (103 mg).

Provenance & Evidence