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Synthesis of 2H-indazoles via Lewis acid promoted cyclization of 2-(phenylazo)benzonitriles |
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| Authors: | Shirtcliff Laura D Rivers Jazmin Haley Michael M |
| Affiliation: | Department of Chemistry, University of Oregon, Eugene, Oregon 97403-1253, USA. |
| Abstract: | Lewis-acid promoted "coarctate" cyclization of 10 2-(phenylazo)benzonitrile derivatives furnishes the isoindazole ring system in ca. 65-95% yield. A plausible mechanism for this unusual transformation is proposed. |
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