A B₂(OH)₄-Mediated Synthesis of 2-Substituted Indazolone and Its Application in a DNA-Encoded Library
2020
Bao, Yapeng | Deng, Zongfa | Feng, Jing | Zhu, Weiwei | Li, Jin | Wan, Jinqiao | Liu, Guansai
Indazolone cores are among the most common structural components in medicinal chemistry and can be found in many biologically active molecules. In this report, a mild and efficient approach to 2-substituted indazolones via B₂(OH)₄-mediated reductive N–N bond formation is developed. This strategy features mild conditions, no request for a metal catalyst, and a wide scope for both aliphatic and aromatic amines. Meanwhile, this method was further successfully applied on DNA to construct indazolone cores for a DNA-encoded library. This will enable the production of a very attractive indazolone-cored library from simple amines and scaffolds, which will provide considerable diversity.
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