| 摘要 |
Substituted, aromatic amino compounds, such as 3-amino-4- hydroxybenzoic acid, are produced by electrolytic reduction of the corresponding aromatic nitro compound in a basic medium at temperatures below 60 degree C and with current densities which exceed 50 milliamperes per cm2. The aminohydroxybenzoic acids are useful in the production of polybenzoxazoles which are used for production of fibres and compositions of high strength and high heat stability.
|
