新型樟脑手性离子液的合成及其不对称环氧化催化性能

Synthesis of camphor chiral ionic liquid and its application in asymmetric oxidation

目的:研究开发分子结构新颖、便宜易得、具有较高化学稳定性与溶解性、低毒、可循环的离子液体.方法:以天然手性源分子樟脑为原料设计并合成1种樟脑衍生的新型手性离子液.结果:选用芳醛与苄溴的不对称环氧化反应体系,结果显示新型樟脑手性离子液具有优良的不对称催化性能.催化剂循环套用5次,其催化活性依然较好,也具有良好的回收与循环使用性能.结论:合成的樟脑手性离子液具有良好的催化和循环使用性能.

Aim ： To study and develop anionic liquid with novel molecular structure, cheaper cost, high chemical stability and solubility, low toxicity, and recyclability. Methods Naturally chiral mole-cule of camphor was used as a raw material. A novel chiral ionic liquid derived from camphor was synthe-sized. Results ： In order to evaluate the catalytic activity, asymmetric epoxidation of aromatic aldehydes with benzyl bromide was used as a reaction model. The results showed that the new chiral ionic liquid had good catalyticactivity, and the catalytic activity maintained even it was reused for 5 times. Conclusion;This new type of sulfur-containing chiral ionic liquid possesses good asymmetric catalytic activity and is recyclable.