Convenient syntheses of 1,2-trans selenoglycosides using isoselenuronium salts as glycosylselenenyl transfer reagents
作者:Ambati Ashok Kumar、Tünde Zita Illyés、Katalin E. Kövér、László Szilágyi
DOI:10.1016/j.carres.2012.07.012
日期:2012.10
temperature to afford the corresponding selenoglycosides in good yields. Aryl halides react to appreciable extent only if bearing activating nitro groups on the aromatic ring. Reactions with acylating reagents such as acetic anhydride and benzoyl chlorides furnished anomeric selenoesters some of which were recently proposed as starting compounds for alternative selenoglycoside syntheses. Selenodisaccharides
可以在一个高收率的步骤中从乙酰卤代糖制得的诸如三和四的Se-糖基-异亚硒酸铵盐被证明是用于合成多种硒代糖苷的方便的起始原料。与(芳)烷基卤化物的反应在温和的条件下,在室温下,在短时间内在室温下进行,以良好的收率得到相应的硒代糖苷。仅当芳族环上带有活化硝基时,芳基卤化物才会发生明显的反应。与酰化试剂如乙酸酐和苯甲酰氯的反应提供了端粒的硒酸酯,最近提出了其中的一些作为替代硒代糖苷合成的起始化合物。