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Vilsmeier-Haack Reaction of Phosphonic Dihydrazide: Synthesis of 4- {[(Dimethyl)azanylidenonium Chloride] Methyl} Amino-2,3-Dihydro-3-Oxo-4H-1,2,4, 3-TriazaphospholeDOI: 10.5923/j.ijmc.20120205.02 Keywords: Phosphonic Dihydrazide,Vilsmeier Reagent, 1,2,4,3-Triazaphosphole Abstract: A simple method for the synthesis of 4-{[(dimethyl)azanylidenonium chloride] methyl}amino-2,3-dihydro- 3-oxo-4H-1,2,4,3-triazaphosphole (2) is described. Treatment of phosphonic dihydrazide (1) with Vilsmeier-Haack reagent led directly to the title compound in high yield.
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