Benzylic and primary alcohols were protected by hexamethyldisilazane in good to excellent yields at r.t. in 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF 4 ]) ionic liquid. In addition, the ionic liquid was recovered quantitatively and reused efficiently in the next reactions. The protocol was successfully applied to the protection of phenols.
苄醇和伯醇在室温下在 1-丁基-3-甲基
咪唑鎓四
氟硼酸盐 ([bmim][BF 4 ])
离子液体中被
六甲基二硅氮烷保护,收率良好至极好。此外,
离子液体被定量回收并在接下来的反应中有效地重复使用。该协议已成功应用于
苯酚的保护。