Ionic liquids with different counter-ion and alkyl substitutes were tested as solvents in the dealkylation and acylation of methyl dehydroabietate, a useful and inexpensive building block for the synthesis of higher diterpenes derivatives. Ionic liquids with halogen counter-ions are very active in both reactions with high rate constant and conversion, avoiding the use of the conventional solvents (benzene
具有不同抗衡离子和烷基取代基的
离子液体在
脱氢松香酸甲酯的脱烷基和酰化反应中作为溶剂进行了测试,这是合成高级二萜衍
生物的有用且廉价的基础。带有卤素抗衡离子的
离子液体在两个反应中都具有很高的速率常数和转化率,因此非常活泼,避免了在这些反应中使用常规溶剂(苯和
二硫化碳)。在脱烷基反应中,抗衡离子从卤素到四
氟硼酸酯的变化对立构选择性具有显着影响,显示了抗衡离子在反应过程中的重要性。