acid for promoting the per-O-acetylation of unprotected sugars. Under controlled conditions it can bring about regioselective acylation of carbohydrate derivatives. At higher concentration and with longer reaction times, iodine can effect the selective acetolysis of benzyl ether-protected primary hydroxyl groups. All of these reactions proceed in high yield, are easy to carry out and make use of readily
已经发现
碘是用于促进未保护的糖的过-O-乙酰化的有效的
路易斯酸。在受控条件下,它可以引起
碳水化合物衍
生物的区域选择性酰化。在更高的浓度和更长的反应时间下,
碘会影响苄基醚保护的伯羟基的选择性乙酰
水解。所有这些反应均以高收率进行,易于进行,并利用廉价且易于处理的
碘。