Synthesis and properties of 10-hydroxy-10-oxo-10H-10λ5-phenoxaphosphine-2,8-dicarboxylic acid and related polybenzoimidazoles
作者:I. I. Ponomarev、Yu. Yu. Rybkin、E. I. Goryunov、P. V. Petrovskii、K. A. Lyssenko
DOI:10.1007/s11172-005-0065-2
日期:2004.9
Oxidation of 10-hydroxy-2,8-dimethyl-10H-10λ5-phenoxaphosphine 10-oxide (1) with potassium permanganate in an alkaline medium afforded 10-hydroxy-10-oxo-10H-10λ5-phenoxaphosphine-2,8-dicarboxylic acid (2). The latter exists as a stable crystal hydrate containing two water molecules. With the aim of examining the possibility of performing the synthesis of polybenzoazoles based on acid 2, the model reaction of the latter with o-phenylenediamine in polyphosphoric acid (PPA) was studied. New high-molecular-weight phosphorus-containing polybenzoimidazoles were prepared by the reaction of 2 with various aromatic tetraamines in PPA and Eaton’s reagent.
在碱性介质中用高锰酸钾氧化 10-hydroxy-2,8-dimethyl-10H-10λ5-phenoxaphosphine 10-oxide (1),可得到 10-hydroxy-10-oxo-10H-10λ5-phenoxaphosphine-2,8-dicarboxylic acid (2)。后者以含有两个水分子的稳定晶体水合物形式存在。为了研究以酸 2 为基础合成多苯并唑的可能性,我们研究了后者与邻苯二胺在多磷酸(PPA)中的模型反应。通过 2 与各种芳香族四胺在 PPA 和伊顿试剂中的反应,制备出了新的高分子量含磷聚苯并咪唑。