七水三氯化铈-碘化钠/二氧化硅-壳聚糖催化剂的制备及其在脱保护反应中的应用

doi:10.11944/j.issn.1000-0518.2015.12.150176

摘要/Abstract

摘要：

分别以Y沸石、活性碳和二氧化硅-壳聚糖(SiO₂-CS)为载体、利用浸渍法制备了一系列负载型七水三氯化铈-碘化钠(CeCl₃·7H₂O-NaI)催化剂,考察了它们在叔丁基苯基醚的脱保护反应中的催化性能。结果表明,SiO₂-CS为载体的催化剂呈现出良好的催化性能和较高的稳定性。另外,在中性条件下,SiO₂-CS负载CeCl₃·7H₂O-NaI催化剂在叔丁基醚及1,3-二硫缩醛脱保护反应中呈现出较高的催化活性,从而避免使用强酸和强碱。

关键词: 二氧化硅, 壳聚糖, 三氯化铈, 碘化钠, 催化剂, 脱保护反应

Abstract:

A series of CeCl₃·7H₂O/NaI catalysts immobilized on various supports such as Y zeolite, activated carbon, and SiO₂-CS was prepared. Their catalytic performances were evaluated in the deprotection reactions of tert-butyl phenyl ether. The supported catalyst exhibits good stability and catalytic activity. To further investigate the application of SiO₂-CS-CeCl₃·7H₂O/NaI system in other deprotection reactions, t-butyl ether and 1,3-dithioacetals were explored. In neutral conditions, the catalyst can effectively promote the deprotection reaction, and the use of strong acid and strong base can be avoided.

Key words: silicon dioxide, chitosan, cerium(Ⅲ) chloride, sodium iodide, catalyst, deprotection reaction

朱驯, 周秀芹, 顾建华, 项东升. 七水三氯化铈-碘化钠/二氧化硅-壳聚糖催化剂的制备及其在脱保护反应中的应用[J]. 应用化学, 2015, 32(12): 1386-1391.

ZHU Xun, ZHOU Xiuqin, GU Jianhua, XIANG Dongsheng. Preparation of Silica/Chitosan Supported Cerium(Ⅲ) Chloride Heptahydrate-Sodium Iodide and Its Application on the Cleavage of t-Butyl Ether and Dithioacetal[J]. Chinese Journal of Applied Chemistry, 2015, 32(12): 1386-1391.

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