Under acidic conditions, the reaction of pent-4-enofuranosides with various nucleophiles of mostly alcohol origin furnished bisglycosylated products along with open-chain ketoacetals and monoglycosylated products depending upon the reagents and reaction conditions. The reactions appear to proceed via nucleophilic attack at C-1 and/or C-4 of the reaction intermediates.
在酸性条件下,取决于试剂和反应条件的不同,戊4-
呋喃呋喃糖苷与各种主要为
醇类衍生的亲核试剂的反应可提供
双糖基化产物以及开链酮
缩醛和
单糖基化产物。反应似乎是通过在反应中间体的C-1和/或C-4处的亲核攻击而进行的。