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Issue 29, 2020
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Synthesis of benzimidazolones via CO2 fixation and N-phenyl formamides using formic acid in presence of zinc embedded polymer complex

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Abstract

The use of formic acid or carbon dioxide as a C1 source for the synthesis of medicinally, as well as industrially, imperative compounds has been gaining predominant attention of synthetic chemists in the current era. This article describes the synthesis of an eco-friendly low-cost modified Merrifield supported zinc catalyst [Zn(Meri-Ald-Py)]. Characterization of the newly synthesized catalyst was performed properly by various instrumental techniques like CHN analysis, elemental mapping, FTIR, Energy Dispersive X-ray analysis, FESEM, TGA, PXRD, N2 adsorption–desorption and AAS (atomic absorption spectroscopy). Benzimidazolone derivatives were synthesized quite efficiently through CO2 fixation in o-phenylenediamine in the presence of a Zn(Meri-Ald-Py) catalyst at 110 °C using 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) under atmospheric pressure. Furthermore, the synthesized catalyst can effectively produce various N-formylated products from aniline derivatives by utilizing formic acid within a very short reaction duration (4.5–20 minutes) at 30 °C. Above all, the catalyst is highly heterogeneous in nature and can be used proficiently in several successive cycles.

Graphical abstract: Synthesis of benzimidazolones via CO2 fixation and N-phenyl formamides using formic acid in presence of zinc embedded polymer complex

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Supplementary files

Article information


Submitted
18 Mar 2020
Accepted
23 Jun 2020
First published
25 Jun 2020

New J. Chem., 2020,44, 12680-12691
Article type
Paper

Synthesis of benzimidazolones via CO2 fixation and N-phenyl formamides using formic acid in presence of zinc embedded polymer complex

P. Basu, T. K. Dey, Sk. Riyajuddin, S. Biswas, K. Ghosh and Sk. Manirul Islam, New J. Chem., 2020, 44, 12680
DOI: 10.1039/D0NJ01363C

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