申请人:SOLVAY INTEROX (Société Anonyme)
公开号:EP0705821A1
公开(公告)日:1996-04-10
A process for the production of aromatic heterocyclic N-oxides by reaction between an aromatic compound comprising a heterocyclic nitrogen atom and hydrogen peroxide in the presence of a manganese porphyrin catalyst is provided. The manganese porphyrin catalyst is substituted by an aromatic group at each meso-position, the aromatic nuclei of the aromatic substituents being substituted by one or more electron-withdrawing groups and/or comprising an aromatic quaternary ammonium heteroatom in the aromatic ring. Preferably, the manganese porphyrin catalyst is manganese tetrakis (2,6-dichlorophenyl) porphyrin chloride, manganese tetrakis (2,6-dichlorophenyl-4-sulphonic acid) porphyrin chloride, manganese tetrakis (4-methylpyridinium) porphyrin chloride, or manganese tetrakis (pentafluorophenyl) porphyrin chloride.
提供了一种通过含有杂环氮原子的芳香族化合物与过氧化氢在锰卟啉催化剂存在下反应来生产芳香杂环N-氧化物的方法。所述锰卟啉催化剂的每个meso位被芳香基团取代,所述芳香取代基的芳香核被一个或多个吸电子基团所取代和/或包含芳香环中的芳香季铵杂原子。优选地,所述锰卟啉催化剂是锰四(2,6-二氯苯基)卟啉氯化物,锰四(2,6-二氯苯基-4-磺酸)卟啉氯化物,锰四(4-甲基吡啶嗡)卟啉氯化物,或锰四(五氟苯基)卟啉氯化物。