The first way involves heating of benzene under reflux of concentrated fuming sulfuric acid for several hours at 40°C. The product formed is benzenesulfonic acid. The electrophile here is actually sulfur trioxide, SO₃. The sulfur trioxide electrophile can be manufactured in one of the two way...
ChemInform Abstract: Vapor㏄hase Nitration of Benzene Over Silica㏒upported Benzenesulfonic Acid Catalyst.nitro compounds (benzene compounds)catalysis, phase‐transfer catalysisnitration, denitrationdoi:10.1002/chin.198819129E. SUZUKIDep. Chem. Eng., Tokyo Inst. Technol., Meguro, Tokyo 152, JapanK. T...
Tortato and M. Sampali, “Thermodynamic Nitration Rates of Aromatic Compounds. Part 3. Nitration of Aromatic Compounds in Concentrated Aqueous Trifluoromethanesulphonic Acid,” Journal of the Chemical Society, Perkin Transactions, Vol. 2, 1991, pp. 423-429. doi:10.1039/p29910000423...
acid such as oleum, sulfuric acid, benzene sulfonic acid, acetic anhydride and phosphorus pentoxide; alkali metal nitrates in the presence of sulfuric acid; organic nitrates, such as acetyl and benzoyl nitrates; metal nitrates in the presence of acetic acid; nitrosulfonic acid and nitrogen ...
Olah G A,Narang S C.Synthetic methods and reactions.49.Perfluorinated resinsulfonic acid (Nafion-H) catalyzed nitration of aromatic compounds with butyl ... GKS Prakash,GA Olah - Proceedings of the Indian Academy of Sciences - Chemical Sciences 被引量: 261发表: 1988年 ChemInform Abstract: Regio...
BENZENEPHOSPHONO-3-SULFONIC ACIDBENZENEPHOSPHONO-3,5-DISULFONIC ACIDA facile conversion of aliphatic isocyanates to N,N-dinitramines has been developed. An aliphatic isocyanate is treated with a mixture of nitronium fluoroborate and nitric acid in acetonitrile giving fair yields and simplifing the ...
19. Reactions of Aromatics: EAS and Beyond EAS Nitration requires nitric acid to react with a catalytic acid to generate astrongnitroniumionelectrophile. 1 concept EAS Nitration Video duration: 6m 12 Comments Mark as completed 20 2 concept ...
Under similar conditions, we were, however, able to trap the tyrosyl radical using the spin trap dibromonitrosobenzene sulfonic acid (DBNBS). Competition spin‐trapping experiments revealed that intramolecular electron transfer is the dominant mechanism for thiyl radical formation in YC peptides. We ...
Ytterbium(III) complexes of benzenesulfonic acid, Yb(BSA)_3 ,p-toluenesulfonic acid, Yb(Tos)_3, and 2-naphthalenesulfonic acid, Yb(NSA)_3, were prepared and tested as possible catalyst for the nitration of toluene. With a loading of 5-10 mol percent of Yb(BSA)_3 and Yb(NSA)_3, a...
The use of the aromatic sulphonic acids increases the yield of p-nitrotoluenes.SOGN ALLEN W.NATOLI JOSEPH G.Nitration of Toluene in the Presence of an Aromatic sulfonic acid.U.S. 3,196, 186. 1965Nitration of Toluene in the Presence of an Aromatic sulfonic acid. U.S. 3,196, 186 . ...