Efficient Synthesis of a Sialic Acid α(2→3)Galactose Building Block and Its Application to the Synthesis of Ganglioside GM3
作者:Yunpeng Liu、Xiaohong Ruan、Xiangpeng Li、Yingxia Li
DOI:10.1021/jo800138p
日期:2008.6.1
with up to 73% yield and 8.4:1 stereoselectivity, was realized when 2,3,4-unprotected galactose derivatives and TBSOTf were used as acceptors and promoter, respectively. Sialylation of 2-(trimethylsilyl)ethyl 6-O-tert-butyldiphenylsilyl-β-d-galactopyranoside (3f) gave the best result, and the resultant Neu5Ac α(2→3)Gal disaccharide was successfully used in the synthesis of ganglioside GM3.