求助2'-O-Methyl-Guanosine研发中遇到的一个小问题

小弟我在做2'-O-Methyl-Guanosine的小试过程中遇到一个棘手的问题,望各位大侠能给点意见!!谢谢!!

我是从6-氯-鸟苷上甲氧基的,上完后我用DABCO(三乙烯二胺)脱氯,现在问题是2'-甲氧基-6-氯-鸟苷与DABCO反应后,有大量固体不溶于水(此固体我认为是DABCO与6位的氯形成的季铵盐中间体),用NaOH调PH=12有更多固体析出(我分析应该固体溶解才对呀) 即使我加热,固体量也不减少!!
请各位大侠赐教!!!!
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  • organic1 (2008-5-03 09:18:02)

    Why did you use DABCO with 6-Chloropurine? it is the methods for make of 6-alkyloxy analogues. I never saw some reference which can hydrolyze this salt. Actually it is easily from chloride to OH. for example: using 1N NaOH reflux. and HSCH2CH2OH and MeONa, then  refulx.
    If you put your all compound to form the salt, reflux with PhCH2ONa, obtained the benzyl compounds, then hydrogen operation by Pd/C.