s-Tetrazine-functionalized hyper-crosslinked polymers for efficient photocatalytic synthesis of benzimidazoles

被引：55

作者：

An, Wan-Kai ^{[1
]}

Zheng, Shi-Jia ^{[1
]}

Zhang, Hui-Xing ^{[1
]}

Shang, Tian-Tian ^{[1
]}

Wang, He-Rui ^{[2
]}

Xu, Xiao-Jing ^{[1
]}

Jin, Qiu ^{[1
]}

Qin, Yuchen ^{[1
]}

Ren, Yunlai ^{[1
]}

Jiang, Song ^{[1
]}

Xu, Cui-Lian ^{[1
]}

Hou, Mao-Song ^{[1
]}

Pan, Zhenliang ^{[1
]}

机构：

[1] Henan Agr Univ, Coll Sci, Zhengzhou 450002, Hennan, Peoples R China

[2] Henan Agr Univ, Coll Food Sci & Technol, Zhengzhou 450002, Hennan, Peoples R China

来源：

GREEN CHEMISTRY | 2021年 / 23卷 / 03期

基金：

中国国家自然科学基金;

关键词：

POROUS ORGANIC POLYMERS; CONJUGATED MICROPOROUS POLYMERS; PERIODIC MESOPOROUS ORGANOSILICAS; ONE-POT SYNTHESIS; HETEROGENEOUS CATALYSTS; 3,6-DI(PYRIDIN-2-YL)-1,2,4,5-TETRAZINE PYTZ; HYPERCROSSLINKED POLYMERS; GREEN SYNTHESIS; FRAMEWORKS; OXIDATION;

D O I：

10.1039/d0gc03719b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing green-safe, efficient and recyclable catalysts is crucial for the chemical industry. So far, organic photocatalysis has been proved to be an environmentally friendly and energy-efficient synthetic technology compared with traditional metal catalysis. As a versatile catalytic platform, hyper-crosslinked polymers (HCPs) with large surface area and high stability are easily prepared. In this report, we successfully constructed two porous HCP photocatalysts (TZ-HCPs) featuring s-tetrazine units and surface areas larger than 700 m(2) g(-1) through Friedel-Crafts alkylation reactions. The rational energy-band structures and coexisting micro- and mesopores endow TZ-HCPs with excellent activities to realize the green synthesis of benzimidazoles (28 examples, up to 99% yield, 0.5-4.0 h) in ethanol. Furthermore, at least 21 iterative catalytic runs mediated by TZ-HCP1D were performed efficiently, with 96-99% yield. This study of TZ-HCPs sheds light on the wide-ranging prospects of application of HCPs as metal-free and green photocatalysts for the preparation of fine chemicals.

引用

页码：1292 / 1299

页数：8

共 95 条

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