反应详情

温度

-78 °C

4-Amino-2-ethylsulfanylpyrimidine-5-carboxylic acid methoxymethylamide (200 mg, 0.830 mmol, Example 1) was dissolved in anhydrous tetrahydrofuran (3 mL) and cooled to −78° C. A solution of 2-methoxyphenyl lithium (˜3 equiv, freshly prepared following the same procedure as Step A of Example 2) was added. The reaction was stirred at −78° C. for 1.5 hours and quenched with aqueous ammonium chloride solution. The resulting mixture was extracted with ethyl acetate (3×20 mL), washed with brine (2×10 mL), dried over sodium sulfate and evaporated in vacuo. The residue was purified on silica gel with 60:40 of hexane/ethyl acetate to give (4-amino-2-ethylsulfanylpyrimidin-5-yl)-(2-methoxy-phenyl)-methanone as a white solid (224.1 mg, 94% yield). HRMS, observed: 290.0961; Calcd for (M+H)+: 290.0958.

1. additionwas added
2. customquenched with aqueous ammonium chloride solution
3. extractionThe resulting mixture was extracted with ethyl acetate (3×20 mL)
4. washwashed with brine (2×10 mL)
5. dry with materialdried over sodium sulfate
6. customevaporated in vacuo
7. customThe residue was purified on silica gel with 60:40 of hexane/ethyl acetate