Efficient cycloaddition of CO2 to epoxides using novel heterogeneous organocatalysts based on tetramethylguanidine-functionalized porous polyphenylenes
Efficient cycloaddition of CO2 to epoxides using novel heterogeneous organocatalysts based on tetramethylguanidine-functionalized porous polyphenylenes
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DOI：
10.1016/j.jcou.2018.04.001
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发表时间：
2018-05-01
影响因子：
7.7
通讯作者：
Iglesias, Marta
中科院分区：
文献类型：
--
作者：
Maya, Eva M.;Rangel-Rangel, Elizabeth;Iglesias, Marta
通过与环氧化物的环加成将CO2转化为环状碳酸酯在相对温和的反应条件下（无溶剂，7巴CO2，100 ℃）使用容易获得的多相四甲基胍（TMG）-聚亚苯基有机催化剂实现。这些新的高稳定性催化剂是由四甲基脲在草酰氯存在下与氨甲基聚亚苯基反应容易制备的。由预官能化网络制备的TMG官能化的聚亚苯基（2 PhCH（2）TMG）与其他报道的催化剂相比是有效的和有竞争力的，实现了高的环氧化物转化率（> 90%）和100%的对相应的环状碳酸酯的选择性。该催化剂易于从反应介质中分离出来，碱再生后重复使用，活性没有损失。
The conversion of CO2 into cyclic carbonates by cycloaddition to epoxides is achieved under relatively mild reaction conditions (without solvent, 7 bar of CO2, 100 degrees C) using easily available heterogeneous tetra-methylguanidine(TMG)-polyphenylene organocatalysts. These new highly stable catalysts were easily prepared by reaction of tetramethylurea in the presence of oxalyl chloride with aminomethyl polyphenylenes. The TMG-functionalized polyphenylene (2PhCH(2)TMG) prepared from a pre-functionalized network was efficient and competitive compared with other reported catalysts achieving high epoxides conversion (> 90%) and 100% selectivity towards the corresponding cyclic carbonates. The catalyst was easily separated from the reaction media and reused after basic regeneration without loss of activity.