Reaction of 1,2-Diaza-1,3-butadienes with Aminophosphorus Nucleophiles: A Practical Access to New Phosphorylated Pyrazolones
作者:Orazio A. Attanasi、Graziano Baccolini、Carla Boga、Lucia De Crescentini、Gianluca Giorgi、Fabio Mantellini、Simona Nicolini
DOI:10.1002/ejoc.200800856
日期:2008.12
The reaction of 1,2-diaza-1,3-butadienes with dibenzyl diisopropylphosphoramidite, methyl tetraisopropylphosphorodiamidite or tris(dimethylamino)phosphane under solvent-free conditions gave stable α-phosphoranylidene-hydrazones that, in turn, were transformed into the corresponding 5-oxo-4-phosphoranylidene-4,5-dihydro-1H-pyrazoles. X-ray diffraction analysis of one of these derivatives is reported
1,2-二氮杂-1,3-丁二烯与二苄基二异丙基亚磷酰胺、甲基四异丙基亚磷酰胺或三(二甲氨基)膦在无溶剂条件下反应得到稳定的 α-亚膦基-腙,然后转化为相应的 5- oxo-4-phosphoranylidene-4,5-dihydro-1H-pyrazoles。报道了这些衍生物之一的 X 射线衍射分析。α-亚磷酰腙衍生自 1,2-二氮杂-1,3-丁二烯与二苄基二异丙基亚磷酰胺之间的反应,通过水解裂解转化为 (E)-腙-膦酸酯,可用于制备相应的 ( 3-oxo-2,3-dihydro-1H-pyrazol-4-yl)phosphonamidates。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)