中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1,3-二硝基苯 | 1,3-Dinitrobenzene | 99-65-0 | C6H4N2O4 | 168.109 |
3,5-二硝基苯胺 | 3, 5-dinitroaniline | 618-87-1 | C6H5N3O4 | 183.123 |
3,5-二硝基溴苯 | 3,5-dinitrobromobenzene | 18242-39-2 | C6H3BrN2O4 | 247.005 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-碘-5-硝基苯胺 | 3-Jod-5-nitro-anilin | 10394-64-6 | C6H5IN2O2 | 264.022 |
1,3-二硝基苯 | 1,3-Dinitrobenzene | 99-65-0 | C6H4N2O4 | 168.109 |
1-氟-3-碘-5-硝基苯 | 1-fluoro-3-iodo-5-nitrobenzene | 3819-88-3 | C6H3FINO2 | 266.998 |
1,3-二硝基-5-乙烯基-苯 | 1,3-dinitro-5-vinylbenzene | 72918-18-4 | C8H6N2O4 | 194.147 |
Halodimethylsulfonium halide 1, which is readily formed in situ from hydrohaloic acid and DMSO, is a good nucleophilic halide. This activated nucleophilic halide rapidly converts aryldiazonium salt prepared in situ by the same hydrohaloic acid and nitrite ion to aryl chlorides, bromides, or iodides in good yield. The combined action of nitrite ion and hydrohaloic acid in DMSO is required for the direct transformation of aromatic amines, which results in the production of aryl halides within 1 h. Substituted compounds with electron-donating or -withdrawing groups or sterically hindered aromatic amines are also smoothly transformed to the corresponding aromatic halides. The only observed by-product is the deaminated arene (usually <7%). The isolated aryldiazonium salts can also be converted to the corresponding aryl halides using 1. The present method offers a facile, one-step procedure for transforming aminoarenes to haloarenes and lacks the environmental pollutants that usually accompany the Sandmeyer reaction using copper halides. Key words: aminoarenes, haloarenes, halodimethylsulfonium halide, halogenation, amination.
Acidic ionic liquid was immobilized on silica-coated magnetite nanoparticles (Fe3O4@SILnP) and used as an efficient heterogeneous catalyst for the diazotization–iodination reaction of different aromatic amines under solvent-free conditions at room temperature.