Towards the chemoenzymatic synthesis of heparan sulfate oligosaccharides: Oxidative cleavage of p-nitrophenyl group with ceric ammonium salts.

Towards the chemoenzymatic synthesis of heparan sulfate oligosaccharides: Oxidative cleavage of p-nitrophenyl group with ceric ammonium salts.
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DOI:
10.1016/j.tetlet.2013.06.044
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发表时间:
2013-08-14
影响因子:
1.8
通讯作者:
Linhardt RJ
Linhardt RJ
中科院分区:
化学4区
文献类型:
--
作者:
Cai C;Li L;Harvey C;Liu J;Linhardt RJ

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We have developed an efficient chemoenzymatic synthesis of heparan sulfate oligosaccharides employing the para-nitrophenyl (p-NP) β-glucuronide as an acceptor compatible with enzymatic elongation and one that significantly simplifies oligosaccharide purification on C-18 resin. Employing ceric ammonium nitrate as oxidative reagent to remove the p-NP group unexpectedly also removed the glucuronic acid residue at the reducing-end, affording a smaller oligosaccharide. The application of ceric ammonium sulfate allowed the removal of the p-NP without concomitant loss of the adjacent glucuronic acid offering a route to longer heparin sulfate oligosaccharide products.
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