title: Synthesis of 2H-indazoles via Lewis acid promoted cyclization of 2-(phenylazo)benzonitriles.
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.
authors.affiliation: Department of Chemistry, University of Oregon, Eugene, Oregon 97403-1253, USA.
authors.forename: Laura D
authors.initials: LD
authors.lastname: Shirtcliff
authors.forename: Jazmin
authors.initials: J
authors.lastname: Rivers
authors.forename: Michael M
authors.initials: MM
authors.lastname: Haley