Pentacoordinate spirobicyclic
2-phenoxy-1,3-phenylenedioxo-1,3,2-imino(alkyl)acetoxyphosphoranes are
synthesized through a new and efficient method whereby phosphorus
pentachloride is displaced stepwise by catechol, an
N,O-bis(trimethylsilyl)amino acid
and phenol (pathway A) or catechol, phenol and an
N,O-bis(trimethylsilyl)amino acid
(pathway B); this method has advantages of high yields, rapid reaction
times and easy operation, which might provide a new route for the
synthesis of other pentacoordinate phosphoranes.
五配位螺双环 2-苯氧基-1,3-苯基二氧代-1,3,2-亚
氨基(烷基)乙酰氧基
磷烷是通过一种高效的新方法合成的,该方法通过
儿茶酚、N,O-双(三甲基
硅烷基)
氨基酸和
苯酚(途径 A)或
儿茶酚、
苯酚和 N,O-双(三甲基
硅烷基)
氨基酸(途径 B)逐步置换
五氯化磷;该方法具有产率高、反应速度快、操作简便等优点,可为合成其他五配位膦类化合物提供新的途径。