Mono- Vs. Di-flourous tagged Glucosamines for Iterative Oligosaccharide Synthesis.

Mono- Vs. Di-flourous tagged Glucosamines for Iterative Oligosaccharide Synthesis.
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DOI:
10.1016/j.jfluchem.2008.05.001
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发表时间:
2008-10
影响因子:
1.9
通讯作者:
Pohl, Nicola L.
Pohl, Nicola L.
中科院分区:
化学4区
文献类型:
--
作者:
Park, Gisun;Ko, Kwang-Seuk;Zakharova, Aleksandra;Pohl, Nicola L.

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Fluorous-tagged protecting groups are attractive tools for elongating carbohydrate chains in oligosaccharide synthesis. To eliminate the accumulation of failed sequences during automated oligosaccharide synthesis conditions, an additional C8F17 ester derived protecting group was attached to the glycosyl donor to better retain the desired doubly-tagged glycosylation product on fluorous solid phase extraction (FSPE) cartridges. Initial studies show that the double-fluorous-tagging strategy offers a robust enough separation using a commercial FSPE cartridge using simple gravity filtration to separate the desired product from the singly-fluorous-tagged starting materials and their decomposition products. In addition, removal of the fluorous acetate and its byproducts after sodium methoxide treatment and neutralization required only dissolution of the desired sugar in toluene and subsequent removal of the toluene layer from the denser fluorous byproducts.
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