ChemInform Abstract: 2-Oxohydrazones, 4-Hydrazono-1H-pyrazol-5-ones, and Derived Products by Air Oxidation of 1,2-Hydrazino-hydrazones.
Abstract
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ChemInform Abstract
The reaction of electron-poor diazabutadienes (I) with electron-poor hydrazines (II) gives with high regio- and chemoselectivity the Michael addition products (III). These key intermediates are used as building blocks for the synthesis of products and intermediates useful in organic synthesis like heterocycles having a carboxylhydrazine side chain [cf. (V) and 1,2,4-triazines (VII)].
