May-Jun 1987 Non Conventional Syntheses of Heterocyclic Compounds. 3. Synthesis of Indazole Derivatives Raffaello Fusco, Alessandro Marchesini and Franco Sannicole* Dipartimento di Chimica Organica e Industriale dell'Università, Centro CNR per la Sintesi e Stereochimica di Speciali Sistemi Organici, Via G. Venezian 21 20133 Milano, Italy Received December 27, 1985 773 The thermal cyclization of a few 2,6-dimethylphenylazo compounds to indazole ...