The Ferrier rearrangement of a selection of protected glycals was successfully performed using a commercially available H-USY zeolite CBV-720 as catalyst, selected after screening a range of similar catalysts. By incorporating either alcohols, thiophenol, trimethylsilyl azide or allyltrimethylsilane in the reaction it was shown that a range of O-, S-, N- and C-glycosides could be formed. With benzylated glucal and galactal in particular, use of the CBV-720 catalyst led to significantly higher yields of the 2,3-dehydroglycosides than previously reported.
使用商业可获得的H-USY
沸石CBV-720作为催化剂,对一系列保护性
甘露糖环进行Ferrier重排反应,该催化剂是在筛选了一系列类似的催化剂后选出的。通过在反应中加入醇、
硫酚、三甲基甲
硅烷基
叠氮化物或烯丙基三甲基
硅烷,证明了可以形成一系列O-、S-、N-和C-糖苷。特别是对于苄基化的
葡萄糖醇和半
乳糖醇,使用CBV-720催化剂可以获得比先前报道的2,3-脱氢糖苷的产量明显更高的产率。