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Regioselective Synthesis of 1-Alkyl- or 1-Aryl-1H-indazoles via Copper-Catalyzed Cyclizations of 2-Haloarylcarbonylic Compounds.

✍ Scribed by Dolores Vina; Esther del Olmo; Jose L. Lopez-Perez; Arturo San Feliciano


Publisher
John Wiley and Sons
Year
2007
Weight
31 KB
Volume
38
Category
Article
ISSN
0931-7597

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## Abstract 1‐Aryl‐1__H__‐benzotriazole derivatives were synthesized __via__ intramolecular cyclization of easily obtained triazenes, using CuI as the catalyst, DMSO as the solvent, __t‐__BuONa as the base, and 1,10‐phenanthroline as the ligand, in up to 97% yield. The synthesis is regiospecific an