ChemInform Abstract: Superbase‐Catalyzed [4 + 2] Cycloaddition of Acetylenes to 3, 6‐Di(pyrrol‐2‐yl)‐1, 2, 4, 5‐tetrazine: A Facile Synthesis of 3, 6‐Di(pyrrol‐2‐yl)pyridazines. Issue 41 (19th September 2013) - Trofimov, Boris A.; Glotova, Tatyana E.; Shabalin, Dmitrii A.; Dvorko, Marina Yu.; Ushakov, Igor A.; Schmidt, Elena Yu.; Kuzmin, Anton V.; Mikhaleva, Al'bina I.