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- W3208538250 abstract "Abstract Available synthetic protocols for 3,5‐diaryl‐1 H ‐pyrazoles generally demand long reaction time. Herein, we are reporting a CuFe 2 O 4 catalyzed synthetic procedure for the same that delivers products in significantly reduced time starting from tosylhydrazones of aromatic aldehydes and terminal alkynes. Under the reaction condition, tosylhydrazone generates diazo compound in situ, which then undergoes [3 + 2] cycloaddition reaction with the terminal alkyne followed by [1,3]‐H shift to deliver the final products in 72%–85% isolated yield. Magnetically active CuFe 2 O 4 nanoparticles can be recovered very easily after the completion of the reaction and can be reused up to fifth cycle without significant loss in its catalytic activity. Operational simplicity of the methodology along with tolerability of various functional groups as well as easy recovery and high reusability of CuFe 2 O 4 nanoparticles make the procedure a practical and handy one for the synthesis of 3,5‐diaryl‐1 H ‐pyrazoles." @default.
- W3208538250 created "2021-11-08" @default.
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- W3208538250 date "2021-11-10" @default.
- W3208538250 modified "2023-09-25" @default.
- W3208538250 title "Base promoted <scp>CuFe<sub>2</sub>O<sub>4</sub></scp> catalyzed one‐pot synthesis of 3,<scp>5‐diaryl‐1<i>H</i></scp>‐pyrazoles" @default.
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- W3208538250 doi "https://doi.org/10.1002/jhet.4393" @default.
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