Direct C(sp³)–H acyloxylation of indolin-3-ones with carboxylic acids catalysed by KI
2020
Zhao, Yong-Long | Tang, Yong-Qin | Fei, Xing-Hai | Yang, Fen-Fen | Cao, Zhuo-Xian | Duan, Dong-Zhu | Zhao, Qing-Jie | Yang, Yuan-Yong | Zhou, Meng | He, Bin
The first KI-catalyzed direct acyloxylation of indolin-3-ones with carboxylic acids has been developed using 30% aq. H₂O₂ as a green oxidant at room temperature. Through this strategy, various C2-acyloxy indolin-3-ones were obtained in up to 96% yield. Moreover, the C2-acyloxy indolin-3-ones can serve as versatile intermediates for the synthesis of nucleophilic 2-monoarylated indolin-3-ones and 3-ylidene indoles.
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