| 摘要 |
<p>An alkylated oligosaccharide and an acetyl derivative thereof, both useful as the starting material for producing lowly toxic surfactants or medicines. The alkylated oligosaccharide is prepared by replacing with a linear or branched alkyl group the hydrogen atom of the hydroxyl group at the 1-position of a terminal sugar unit of either an oligosaccharide comprising glucose units bonded together through β(1←3)glycoside linkages or an oligosaccharide wherein galactose is bonded to the 4-position of the galactose moiety of lactose through a β(1←4)glycoside linkage and further molecules of galactose are sequentially bonded to newly formed terminal galactose units each through a β(1←4)glycoside linkage. The invention also includes an acetyl derivative of the oligosaccharide, an alkylated oligosaccharide which is acetylated at any hydroxyl group other than the hydroxyl group at the 2-position adjacent to the alkyl ether linkage of a terminal sugar unit, and a mixture thereof. A heteropolyacid is used as a reagent in the reaction of an acetylated oligosaccharide with an alcohol.</p> |
