| 摘要 |
Bis (amine-containing) benzenediols are prepared by the hydrogenation and dehalogenation of bis (amine-containing) dihalobenzoquinones using formic acid, formate salts or mixtures thereof in the presence of a noble metal catalyst. An example of a compound produced by this process is 2,5-diamino-1,4-benzenediol. The benzenediols produced by the process of this invention are useful as monomers in the preparation of polybenzoxazoles of high thermal stability and compressive strength. |
