A Convenient Synthesis of 1-Aryl- and 2-Aryl-Substituted Indazolones via Intramolecular C–N Coupling Promoted by KOt-Bu
2016
A new method for the synthesis of 1-arylindazolones and 2-arylindazolones from N ′-aryl-2-halobenzohydrazides promoted by KO t -Bu was developed. The difference of 2-halogen substituent exerted a significant effect on the distribution of the products. Two distinct reaction pathways are proposed for the generation of 1-arylindazolones and 2-arylindazolones, respectively.
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