Tosylazid addiert sich in stark alkalischem Medium an Malodinitril unter der Bildung von 5‐Tosylamino‐1H‐1,2,3‐triazol‐4‐carbonitril (1). Methylierungen mit Dimethylsulfat (zu 2‐4 und 5‐8), die Synthese von 1 aus 12, verschiedene Abbaureaktionen (1→14,1→16 und 1→17) sowie die Umwandlung von 1 in das Diazotriazol 21 stellen die Struktur des Adduktes sicher und schließen ein Triazenisomeres E aus.
2‐Aza‐1,3‐dienes. 2. Synthesis and Structure of a Stable Azomethine‐ylid.
Thermal treatment of 2‐(2′‐cyano‐2′‐methoxycarbonyl)methylide‐amino‐1‐morpholino‐cyclohexene results in the formation of a stable isomere. Its azomethine‐ylid structure is demonstrated from the spectroscopic data (UV., IR., 1H‐ and 13C‐NMR.). 1,3‐dipolar cycloaddition reactions of this ylid leads to spiropyrrolines.
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