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baishitou3金蟲 (小有名氣)
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[交流]
重金求化學(xué)合成翻譯，高手進(jìn)來指導(dǎo)指導(dǎo)
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To a flame-dried Schlenk test tube with a magnetic stirring bar was charged CuI (38.2 mg, 0.2 mmol), Cs 2 CO 3 (0.65 g, 2.0 mmol), nitrogen- containing heterocycle (1.4 mmol), aryl or heteroaryl halide (1.0 mmol), and DMF (2 mL) under N 2 . A rubber septum was replaced with a glass stopper, and the system was then evacuated twice and back filled with N 2 . The reaction mixture was stirred for 30 min at room temperature, and then heated at 120 °C for 40 h. The reaction mixture was then cooled to ambient temperature, diluted with 2-3 mL of ethyl acetate, filtered through a plug of silica gel, and washed with 10-20 mL of ethyl acetate. The combined organic extracts were concentrated, and the resulting residue was purified by column chromatography on silica gel to provide the desired product. 以上是一段合成的步驟，filtered through a plug of silica gel, and washed with 10-20 mL of ethyl acetate. The combined organic extracts were concentrated,這一段非常的難懂啊，高手們進(jìn)來看看，指導(dǎo)指導(dǎo)啊 |
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filtered through a plug of silica gel, and washed with 10-20 mL of ethyl acetate. The combined organic extracts were concentrated, and the resulting residue was purified by column chromatography on silica gel to provide the desired product. （在砂心漏斗或布氏漏斗里）先填上些硅膠，然后抽濾，再用10-20 mL乙酸乙酯淋洗。合并所得濾液（即抽濾和乙酸乙酯淋洗所得的濾液），將濾液濃縮（用旋轉(zhuǎn)蒸發(fā)儀最方便了）后所得的剩余物過硅膠柱（即有機(jī)合成上俗稱的過柱子），即可得到所需產(chǎn)物。 |
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