A Simple Synthesis of Stable Phosphoranes Derived from Imides or Acetanilide Derivatives
作者:Issa Yavari、Mohammad Bayat、Malek T. Maghsoodlou、Norollah Hazeri
DOI:10.1080/10426500214569
日期:2002.11.1
acetylenedicarboxylates, and strong NH-acids, such as acetanilide, 4-methylacetanilide, 2-cyanoacetanilide, 4-bromoacetanilide, 4-methoxyacetanilide, succinimide, malimide, or phthalimide. These stabilized phosphoranes exist as a mixture of two geometrical isomers as a result of restricted rotation around the carbon-carbon partial double bond resulting from conjugation of the ylide moiety with the adjacent carbonyl
通过三苯基膦、乙炔二羧酸二烷基酯和强 NH 酸(例如乙酰苯胺、4-甲基乙酰苯胺、2-氰基乙酰苯胺、4-溴乙酰苯胺、4-甲氧基乙酰苯胺)之间的 1:1:1 加成反应,以极好的收率获得稳定的结晶磷叶立德,琥珀酰亚胺、马来酰亚胺或邻苯二甲酰亚胺。这些稳定的正膦以两种几何异构体的混合物形式存在,这是由于叶立德部分与相邻羰基的共轭导致围绕碳-碳部分双键的旋转受限。