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xwzeng2006銀蟲 (著名寫手)
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[求助]
關(guān)于葉酸活化反應(yīng)是否加入三乙胺
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Briefly, to a solution of folic acid (1.0 g, 2.27 mmol) in 40 ml of dry DMSO was added triethylamine (0.5 ml), N-hydroxysuccinimide (0.52 g, 5.00 mmol), and dicyclohexylcarbodiimide (0.50 g, 2.50 mmol). The mixture was stirred at room temperature in the dark for 24 h. The byproduct, dicyclohexylurea, was filtered off, and 200 ml of acetone/diethyl ether (1:3, v/v) was added to precipitate the product. 葉酸活化采用DCC/NHS,在DMSO中反應(yīng),我看有些文獻(xiàn)中加入少量三乙胺,有些沒有加,請(qǐng)問大家平時(shí)怎么做呢?加不加三乙胺,如果加三乙胺,那目的是什么呢? |
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