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Synlett
DOI: 10.1055/a-2752-7791
DOI: 10.1055/a-2752-7791
Account
Hydrogenation and Dehydrogenative Coupling Reactions Catalyzed by Chromium Complexes: A Personal Account
Authors
Supported by: IIT Jodhpur
S.C. is thankful to SERB for a start-up research grant (Project No. SRG/2020/001047), and IIT Jodhpur (seed grant) for financial support. Tushar, Vaishnavi, and Aman Anand gratefully acknowledge IIT Jodhpur for the fellowship.
Supported by: SERB SRG/2020/001047
Abstract
Homogeneous hydrogenation and dehydrogenation reactions catalyzed by transition metal complexes have emerged as pivotal strategies for constructing diverse organic frameworks. These transformations are inherently atom economical and align well with the principles of green chemistry and sustainability, offering viable routes to environmentally benign synthetic methodologies. The realm of homogeneous catalysis has grown significantly utilizing noble metal catalysts, while their high cost, potential toxicity, and low abundance prompted the researchers to delve into the chemistry of the more sustainable, low cost, and abundant 3d transition metals. In this regard, chromium complexes have been less explored despite the earth abundance and the biocompatibility of the metal, and they remain at a nascent stage in homogeneous hydrogenation and dehydrogenation reactions. In this account, we will discuss our recent discovery of chromium catalysis for the (transfer) hydrogenation of the greenhouse gas carbon dioxide to formate and the dehydrogenative C–C and C–N bond-formation reactions.
Keywords
Homogeneous catalysis - Chromium - Hydrogenation - Dehydrogenation - Alkylation - Imines - Formic acid/formate - CO2Publication History
Received: 20 October 2025
Accepted after revision: 20 November 2025
Accepted Manuscript online:
20 November 2025
Article published online:
19 December 2025
© 2025. Thieme. All rights reserved.
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