论文信息 - The Synthesis of Phosphonyl Pyrazoles

The Synthesis of Phosphonyl Pyrazoles

Phosphonyl hydrazones react with DMF/POCl3 to afford 3-phos-phonyl pyrazoles.Phosphonyl methylene hydrazones react with DMF/POCl3 to provide 4-phosphonyl pyrazoles. 5-phosphonyl pyrazoles are obtained from the reaction of phosphonyl chlorovinylaldchydes with phenylhydrazine.

[1] F. Palacios,et al. An efficient and general strategy for the synthesis of 4-phosphorylated pyrazoles from β-hydrazono phosphine oxides , 1996 .

[2] Azaïez Ben Akacha,et al. PHOSPHO-4-PYRAZOLES. SYNTHESE ET ETUDE SPECTROGRAPHIQUE RMN 1H, 31P ET 13C , 1988 .