Regioselectivity in Sulfation of Galactosides by Sulfuric Acid and Dicyclobexylcarbodi-imide
作者:Ryo Takano、Takashi Ueda、Yasuhide Uejima、Kaeko Kamel-Hayashi、Saburo Hara、Susumu Hirase
DOI:10.1271/bbb.56.1413
日期:1992.1
Methyl α- and β-D-galactopyranosides and 4-O-β-D-galactopyranosyl-3,6-anhydro-L-galactose dimethylacetal were sulfated with sulfuric acid and dicyclohexylcarbodi-imide as a condensation reagent. The sulfated sugars were isolated by ion-exchange chromatography, characterized, and assigned by methylation analyses. On the basis of the yield of each sulfated product that was isolated, sulfation on O-6 appeared to be predominant.
甲基α-和β-D-半乳糖吡喃苷及4-O-β-D-半乳糖吡喃苷-3,6-去水-L-半乳糖二甲基缩醛在硫酸和二环己基碳二亚胺的作用下进行了硫酸化。硫酸化的糖通过离子交换色谱法分离,进行了表征,并通过甲基化分析进行了鉴定。根据分离出的每种硫酸化产物的产率,O-6上的硫酸化似乎占主导地位。