June 1976 Notes 657 Synthesis of Sulphur Containing Fused Ring Heterocycles by Intramolecular 1,3-Dipolar-Cycloadditions Luisa Garanti, Alberto Locatelli, and Gaetano Zecchi Istituto di Chimica industriale dell'Università, Centro del CNR per la Sintesi eSterochimica di speciali sistemi organici, Via Golgi 19, 20133 Milano, Italy Received December 12, 1975 Sulfur containing fused triazoles and pyrazoles are synthesized through intramolecular cyclo- additions of ...