α,β‐Epoxyketon → Alkinon‐Fragmentierung II: Pyrolytischer Zerfall der Hydrazone aus α,β‐Epoxyketonen und N‐Amino‐aziridinen. Über synthetische Methoden, 4. Mitteilung

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Abstract
Numerous examples illustrate the course of the thermolysis of hydrazones derived from α,β‐epoxyketones and 2‐phenyl‐ or trans‐2,3‐diphenyl‐1‐amino‐aziridines. This process constitutes a preparatively useful method for the fragmentation of α,β‐epoxyketones to acetylenic carbonyl compounds including acetylenic aldehydes.Monohydrazones from phenylglyoxal and substituted N‐amino‐aziridines decompose smoothly and stereospecifically to the corresponding olefins and diazoacetophenone; such a process might also be useful for the preparation of other α‐diazocarbonyl compounds.

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