A novel and efficient one-pot sequential C4-diarylation of pyrazolin-5-ones with diaryliodonium salts in the absence of a metal catalyst was reported. A variety of C4-diarylated pyrazolin-5-one derivatives were obtained in good to high yields under mild conditions.
T. Huang, X. Ji, W. Wu, F. Liang and S. Cao, RSC Adv., 2015, 5, 66598 DOI: 10.1039/C5RA14368C
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