The present article describes the reaction between 1,2-diaza-1,3-butadienes and trialkyl phosphites, under an atmosphere of nitrogen and under solvent-free conditions, to give alkyl 3,3-dialkoxy-2H-1,2,3ì 5 -diazaphosphole-4-carboxylates that, in turn, are converted into corresponding E-hydrazonophosphonates by treatment with THF:water (95:5). These latter compounds are obtained directly by the reaction of 1,2-diaza-1,3-butadienes with trialkyl phosphites in the presence of air. These compounds are useful for the further preparation of dialkyl (5-methyl-3-oxo-2,3-dihydro-1H-4- pyrazolyl)phosphonates and 2-dialkoxyphosphoryl-1,2,3-thiadiazoles.

Solvent-Free Reaction of Some 1,2-Diaza-1,3-butadienes with Phosphites: Environmentally Friendly Access to New Diazaphospholes and E-Hydrazonophosphonates

BACCOLINI, GRAZIANO;BOGA, CARLA;
2005

Abstract

The present article describes the reaction between 1,2-diaza-1,3-butadienes and trialkyl phosphites, under an atmosphere of nitrogen and under solvent-free conditions, to give alkyl 3,3-dialkoxy-2H-1,2,3ì 5 -diazaphosphole-4-carboxylates that, in turn, are converted into corresponding E-hydrazonophosphonates by treatment with THF:water (95:5). These latter compounds are obtained directly by the reaction of 1,2-diaza-1,3-butadienes with trialkyl phosphites in the presence of air. These compounds are useful for the further preparation of dialkyl (5-methyl-3-oxo-2,3-dihydro-1H-4- pyrazolyl)phosphonates and 2-dialkoxyphosphoryl-1,2,3-thiadiazoles.
2005
O. A. Attanasi; G. Baccolini; C. Boga; L. De Crescentini; P. Filippone; F. Mantellini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/6023
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