633336-57-9Relevant academic research and scientific papers
One-pot synthesis of (5-aminopyrazol-4-yl)-phosphonic acid derivatives from 1-aryl-5-arylcarboxamidopyrazoles through pyrazolo[4,3-c][1,5,2]-oxazaphosphinines
Volochnyuk, Dmitriy M.,Pushechnikov, Alexei O.,Krotko, Dmitriy G.,Koydan, Georgiy N.,Marchenko, Anatoliy P.,Chernega, Alexander N.,Pinchuk, Alexander M.,Tolmachev, Andrei A.
, p. 906 - 914 (2007/10/03)
1-Aryl-5-arylcarboxamidopyrazoles react with phosphorus(III) halides giving the new heterocyclic system: pyrazolo[4,3-c][1,5,2]oxazaphosphinine. Treatment of pyrazolo[4,3-c][1,5,2]oxazaphosphinines with nucleophilic or electrophilic reagents leads to a cleavage of the oxazaphosphinine ring yielding derivatives of (5-aminopyrazol-4-yl)phosphonic acid.
