PROCESS FOR THE PREPARATION OF AROMATIC AZOLE COMPOUNDS
申请人:GOLDFINGER MARC B.
公开号:US20140066629A1
公开(公告)日:2014-03-06
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.