Toward the chemoenzymatic synthesis of heparan sulfate oligosaccharides: oxidative cleavage of p-nitrophenyl group with ceric ammonium salts
作者:Chao Cai、Lingyun Li、Cate Harvey、Jian Liu、Robert J. Linhardt
DOI:10.1016/j.tetlet.2013.06.044
日期:2013.8
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
我们开发了一种高效的硫酸乙酰肝素寡糖化学酶法合成方法,采用对硝基苯基( p -NP) β-葡萄糖醛酸作为与酶促延伸相容的受体,并且显着简化了 C-18 树脂上寡糖的纯化。使用硝酸高铈铵作为氧化剂去除p -NP基团出乎意料地也去除了还原端的葡萄糖醛酸残基,得到更小的寡糖。硫酸高铈铵的应用可以去除p -NP,而不会同时损失相邻的葡萄糖醛酸,从而为更长的硫酸肝素寡糖产品提供了一条途径。