rearrangement. The donors include 3,4,6-tri-O-acetyl- d -glucal and 3,4-di-O-acetyl- l -rhamnal. The acceptors consist of primary alcohols, secondary alcohols, tert-butanol, unsaturated alcohols, halogenated alcohol, sterol, sugars, and phenols. O-2,3-Unsaturated glycosides were obtained rapidly ( 5:1 to 19:1). Moreover, the catalyst can be easily separated from the reaction with an external magnetic force
研究了一种磁性核壳固体酸催化剂
Fe3O4@C-SO3H,用于通过费里叶重排合成 O-2,3-不饱和糖苷。供体包括3,4,6-三-O-乙酰-d-
葡糖醛和3,4-二-O-乙酰-1-鼠李醛。受体由伯醇、仲醇、
叔丁醇、不饱和醇、卤代醇、
甾醇、糖和
酚组成。快速获得 O-2,3-不饱和糖苷(5:1 至 19:1)。此外,该催化剂可以很容易地通过外部磁力从反应中分离出来并重复使用至少 5 次,每次循环后产物的产率没有任何显着下降,表明它是一种很有前途的 2,3-不饱和绿色催化剂。糖苷合成。