Regioselective mono-2-O-sulfonation of cyclomaltooctaose was conveniently achieved by using the combination of sulfonyl imidazole and molecular sieves in DMF. In this reaction, no 3-O- or 6-O-sulfonation products were produced. The reactions do not require strict anhydrous or basic conditions, or specific sulfonyl groups.
环糊精的单2-O-
磺酸化通过在
DMF中使用磺酰
咪唑和
分子筛的组合方便地实现。在此反应中,没有产生3-O-或6-O-
磺酸化产物。该反应不需要严格的无
水或碱性条件,也不需要特定的磺酰基。