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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),我看有些文獻中加入少量三乙胺,有些沒有加,請問大家平時怎么做呢?加不加三乙胺,如果加三乙胺,那目的是什么呢? |
銀蟲 (著名寫手)
捐助貴賓 (正式寫手)

銀蟲 (著名寫手)
專家顧問 (正式寫手)
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專家經(jīng)驗: +40 |
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關(guān)于NHS-Folic acid的合成方案,你說的這篇文章1并沒有引用原文獻。 文章1:Tumor site-specific silencing of NF-κB p65 by targeted hollow gold nanospheres-mediated photothermal transfection Cancer Res. 2010 April 15; 70(8): 3177–3188. 只是在附加信息里面引用了文章2: Van Steenis, J.H. et al. Preparation and characterization of folate-targeted pEG-coated pDMAEMA-based polyplexes. J Control Release 87, 167-176 (2003). 而文章2卻引用了另一篇文獻3:Receptor-targeted gene delivery via folate-conjugated polyethylenimine.AAPS PharmSci. 1999;1(4):E19. 而文獻3里面并沒有使用TEA。 http://www.torna.do/a/jRbQMVxfyx ... ci_www.torna.do.pdf 結(jié)論是很多文獻只有參考價值,但不可盲從。如果非要搞個明白,做個對照實驗,一鍋加TEA,一鍋不加,結(jié)果自有分曉。 |

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