A Novel Synthetic Approach to 4-Acetamido-1-arylindazoles via Semmler—Wolff Rearrangement of 1-Aryl-6,7-dihydro-5H-indazol-4-one Oxime.
ChemInform(2014)
摘要
A facile protocol using acetic anhydride and NaI is developed for Semmler—Wolf aromatization of oximes (I) to give indazole derivatives.
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