Exploiting the cross-metathesis reaction in the synthesis of pseudo-oligosaccharides
作者:Paolo Ronchi、Stefano Vignando、Sara Guglieri、Laura Polito、Luigi Lay
DOI:10.1039/b822989a
日期:——
An approach to the synthesis of pseudo-oligosaccharides based on the cross-metathesis reaction between distinct sugar-olefins, followed by intramolecular cyclization of the obtained heterodimer, is presented. In particular, the relative efficiency of two alternative approaches, the straightforward cross-metathesis reaction and the two-step procedure (self-metathesis followed by cross- metathesis), was explored and compared for diverse sugar-olefin substrates. Some representative examples of intramolecular cyclization using iodine as an electrophilic promoter, are also reported.
本文提出了一种基于不同糖烯之间的交叉易位反应,随后通过所得异二聚体的分子内环化来合成伪寡糖的方法。特别是,针对多种糖烯底物,探究并比较了两种替代方法的相对效率:直接的交叉易位反应和两步程序(自我易位后进行交叉易位)。此外,还报告了一些使用碘作为亲电促进剂的分子内环化的代表性实例。