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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 54, 2024 - Issue 8
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Articles

Synthesis of 1H-benzimidazoles via the condensation of o-phenylenediamines with DMF promoted by organic acid under microwave irradiation

Wenjuan Lia College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, China;b Chemistry and Chemical Engineering, Jining Normal University, Ulanqab, Inner Mongolia, ChinaView further author information
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Xiao Lia College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, China;c Key Laboratory of CO2 Resource Utilization at Universities of Inner Mongolia Autonomous Region, Hohhot, China;d Inner Mongolia Engineering Research Center for CO2 Capture and Utilization, Hohhot, ChinaCorrespondence[email protected]
View further author information
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Hailong Honga College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, China;c Key Laboratory of CO2 Resource Utilization at Universities of Inner Mongolia Autonomous Region, Hohhot, China;d Inner Mongolia Engineering Research Center for CO2 Capture and Utilization, Hohhot, ChinaView further author information
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Ruijun Xiea College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, China;c Key Laboratory of CO2 Resource Utilization at Universities of Inner Mongolia Autonomous Region, Hohhot, China;d Inner Mongolia Engineering Research Center for CO2 Capture and Utilization, Hohhot, ChinaView further author information
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Ning Zhua College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, China;c Key Laboratory of CO2 Resource Utilization at Universities of Inner Mongolia Autonomous Region, Hohhot, China;d Inner Mongolia Engineering Research Center for CO2 Capture and Utilization, Hohhot, ChinaCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0002-7535-1310View further author information
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Pages 645-654 | Received 20 Sep 2023, Published online: 06 Mar 2024
 
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Abstract

An effective, green and eco-friendly method was developed to synthesize 1H-benzimidazole under microwave irradiation. The reactions of substituted o-phenylenediamine with DMF were efficiently promoted by butanoic acid, and the desired product 1H-benzimidazole derivatives were obtained in good to excellent yields. Compared with the conventional heating method, microwave irradiation significantly reduced the reaction time and improved the yields of the target products.

Graphical Abstract

Disclosure statement

The authors declare no conflict of interest.

Additional information

Funding

This work was supported by the Program for Grassland Excellent Talents of Inner Mongolia Autonomous Region, the National Natural Science Foundation of China (21865020), the Natural Science Foundation of Inner Mongolia (No.2021ZD02), Inner Mongolia Science and Technology Key Projects (2021GG0335) and Innovative Research Team in Universities of Inner Mongolia Autonomous Region (NMGIRT2212) and the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (2019).

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