Aromatic azole compounds such as 2-(4-aminophenyl)-5-amino-benzimidazole are prepared in an organic sulfonic acid solvent instead of polyphosphoric acid. This allows recovery and recycle of the solvent and avoids the handling and environmental concerns resulting from the use of polyphosphoric acid. The resulting compounds find use in the pharmaceutical industry, as anticorrosion agents, and as precursors for high-performance fibers having high strength, stiffness, and flame resistance.
芳香唑类化合物,如
2-(4-氨基苯基)-5-氨基苯并咪唑,是在有机
磺酸溶剂中制备的,而不是在聚
磷酸中制备的。这样可以回收和循环溶剂,并避免使用聚
磷酸所带来的处理和环境问题。所得的化合物在制药工业中被用作抗腐蚀剂,并作为高性能纤维的前体,具有高强度、刚度和阻燃性。