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Hydrazones, recognized for their distinctive properties, exhibit high versatility in synthetic chemistry, facilitating numerous chemical transformations. Given their crucial roles in organic synthesis, the combination of CO2 with hydrazones has garnered increasing research interest. This review provides a comprehensive summary of recent progress in reactions involving CO2 and hydrazones or their derivatives. These include the coupling of amines and N-tosylhydrazones with CO2, the umpolung-mediated carboxylation of hydrazones\/N-tosylhydrazones with CO2, the cyclization of hydrazones with CO2, and lactamization reactions incorporating N-tosylhydrazones and CO2. These transformations utilize the diverse reactivity of hydrazones and their derivatives to capture and convert CO2, generating valuable organic compounds with both academic and practical relevance. Additionally, the review examines the mechanisms underlying these reactions, offering critical insights for advancing research in this area.<\/jats:p>","DOI":"10.3390\/molecules30091987","type":"journal-article","created":{"date-parts":[[2025,4,30]],"date-time":"2025-04-30T05:05:57Z","timestamp":1745989557000},"page":"1987","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Research Progress on the Reaction of Carbon Dioxide with Hydrazones and Their Derivatives"],"prefix":"10.3390","volume":"30","author":[{"given":"Hong-Xia","family":"Sun","sequence":"first","affiliation":[{"name":"Natural Products Chem-Bio Innovation Center, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, China"},{"name":"Department of Applied Biology and Chemical Technology, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 999077, China"},{"name":"School of Chemistry 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