One-Pot Synthesis of (5-Aminopyrazol-4-yl)-phosphonicAcid Derivatives from 1-Aryl-5-arylcarboxamidopyrazoles throughPyrazolo[4,3-c][1,5,2]-oxazaphosphinines
作者:Dmitriy M. Volochnyuk、Alexei O. Pushechnikov、Dmitriy G. Krotko、Georgiy N. Koydan、Anatoliy P. Marchenko、Alexander N. Chernega、Alexander M. Pinchuk、Andrei A. Tolmachev
DOI:10.1055/s-2003-38685
日期:——
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.
1 芳基-5-芳基脒并吡唑与卤化磷(III)反应生成新的杂环系统:吡唑并[4,3-c][1,5,2]恶唑膦。用亲核或亲电试剂处理吡唑并[4,3-c][1,5,2]恶唑膦,会导致恶唑膦环裂解,产生 (5-aminopyrazol-4-yl)phosphonic acid 衍生物。