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Iron-Catalyzed Photoinduced Decarboxylative Cascade Process for the Synthesis of Functionalized Pyrazolones and
Xinran Zhang1, Huilin Ling1, Xiaojia Liu1
1School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai264005, China.
Abstract:
In this work, we established a decarboxylative cascade process to achieve functionalized pyrazolones. This approach directly employs carboxylic acids as alkylating reagents. An inexpensive iron photocatalyst enables this process when irradiated by visible light. The reaction demonstrated a broad substrate scope, proving compatible with various carboxylic acids and N-acrylohydrazones. Furthermore, biological activity evaluation revealed that compound 3ak acted as a potent inhibitor of NO production, while compound 3al exhibited potent antiproliferative activity against the PANC-1 cell line, with an IC50 value of 14.3 μM.
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