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. 2023 Jul 24;3(5):299-304.
doi: 10.1021/acsorginorgau.3c00023. eCollection 2023 Oct 4.

Base Metal Catalyst for Indirect Hydrogenation of CO2

Jagrit Grover  1 , Suman Maji  1 , Chitrala Teja  1 , Shaeel A Al Thabaiti  2 , Mohamed Mokhtar M Mostafa  2 , Goutam K Lahiri  1 , Debabrata Maiti  1
Affiliations

Base Metal Catalyst for Indirect Hydrogenation of CO2

Jagrit Grover et al. ACS Org Inorg Au. .

Abstract

We herein report a novel Mn-SNS-based catalyst, which is capable of performing indirect hydrogenation of CO2 to methanol via formylation. In this domain of CO2 hydrogenation, pincer ligands have shown a clear predominance. Our catalyst is based on the SNS-type tridentate ligand, which is quite stable and cheap as compared to the pincer type ligands. The catalyst can also be recycled effectively after the formylation reaction without any significant change in efficiency. Various amines including both primary and secondary amines worked well under the protocol to provide the desired formylated product in good yields. The formed formylated amines can also be reduced further at higher pressures of hydrogen. As a whole, we have developed a protocol that involves indirect CO2 hydrogenation to methanol that proceeds via formylation of amines.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Transition metal catalysts for CO2 hydrogenation.
Figure 2
Figure 2
UV spectra of the synthesized catalyst.
Figure 3
Figure 3
Control experiments for formylation of morpholine (yields are calculated by 1H NMR using trimethoxybenzene (TMB) as an internal standard).
Figure 4
Figure 4
Formylation of amines using the Mn-SNS catalyst.
Figure 5
Figure 5
Plausible mechanism for CO2 hydrogenation to methanol.
See this image and copyright information in PMC

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