Copper-catalyzed mild and efficient entry to 1-substituted indazolones.

[摘要]：A variety of 1-alkyl- and aryl-substituted indazolones were synthesized easily starting from com. available 2-halobenzoic acids and hydrazines via the copper-catalyzed intramol. C-N bond formation of 2-halobenzohydrazides under mild conditions.

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