1,2,3,4,6-五-O-乙酰基吡喃葡萄糖有两种异构体:α-异头物(α-anomer)和β-异头物(β-anomer),它们是合成吡喃葡萄糖衍生物的重要原料。制备这两种异头物的方法一般是以相对应的纯α-D-葡萄糖或β-D-葡萄糖为原料,在低温(0℃左右),无水氯化锌或吡啶存在下,与乙酸酐反应而制得。本文介绍制备这两种异头物的简便方法: There are two isomers of 1,2,3,4,6-penta-O-acetylglucopyranoside: α-anomer and β-anomer, which are Synthesis of glucopyranose derivatives important raw materials. The preparation of these two anilox methods are generally based on the corresponding pure α-D-glucose or β-D-glucose as raw material, at low temperature (0 ° C), anhydrous zinc chloride or pyridine in the presence of B Anhydride reaction and prepared. This article describes a simple way to prepare both ancestries: