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DOI: 10.1039/A702813J (Paper) Reference Section for: J. Chem. Soc., Perkin Trans. 1, 1997, 2021-2022

New and efficient approach to the synthesis of pentacoordinate spirobicyclic phosphoranes

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Hua Fu, Guang-Zhong Tu, Zhao-Long Li, Yu-Fen Zhao and Ri-Qing Zhang

Abstract

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.

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