AN UNEXPECTED SIALYLATION - TOTAL SYNTHESES OF G(M4) AND A POSITIONAL ISOMER

AN UNEXPECTED SIALYLATION - TOTAL SYNTHESES OF G(M4) AND A POSITIONAL ISOMER
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DOI:
10.1021/jo00072a031
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发表时间:
1993-09-24
影响因子:
3.6
通讯作者:
DANISHEFSKY, SJ
DANISHEFSKY, SJ
中科院分区:
化学2区
文献类型:
--
作者:
GERVAY, J;PETERSON, JM;DANISHEFSKY, SJ

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使用甘糖3和4作为1,2-无水糖的前体,极大地简化了β -连接神经酰胺糖苷的安装。通过安排神经酰胺和唾液酸的引入,人们可以获得神经节苷G(M4)(1),并通过意想不到的区域选择性糖基化,获得其NeuAc(2—>2)Gal位置异构体10。
The use of glycals 3 and 4 as precursors to 1,2-anhydrosugars greatly simplifies the installation of a beta-linked ceramide glycoside. By permuting the introduction of the ceramide and the sialic acid, one can access the ganglioside G(M4) (1) and, by an unexpected regioselective glycosylation, its NeuAc (2-->2) Gal positional isomer 10.