4284-58-6

Upstream product

• 7664-93-9 sulfuric acid 
• 599-86-0 4-methyl-N-(4-methylphenyl)benzenesulfonamide 
• 106-49-0 p-toluidine 
• 98-59-9 p-toluenesulfonyl chloride 
• 622-57-1 N-ethyl-p-tolylamine 
• 351072-27-0 toluene-4-sulfonic acid-(N-ethyl-p-toluidide) 
• 861375-35-1 [4-methyl-2-(toluene-4-sulfonyl)-phenyl]-nitroso-phenyl-amine 
• 408351-93-9 [4-methyl-2-(toluene-4-sulfonyl)-phenyl]-phenyl-amine 
• 58751-03-4 4-methyl-N-phenyl-N-(p-tolyl)benzenesulfonamide 
• 620-84-8 4-methyldiphenylamine 
• 7647-01-0 hydrogenchloride 
• 860571-70-6 N-ethyl-4-methyl-2-(toluene-4-sulfonyl)-aniline 
• 861375-33-9 [4-methyl-2-(toluene-4-sulfonyl)-phenyl]-(4-nitroso-phenyl)-amine 

Relevant academic research and scientific papers

Triflic acid–catalyzed rearrangement of unalkylated benzene sulfonanilides

ABSTRACT: Previous work has demonstrated that alkylated benzene sulfonanilides undergo sulfuric acid (98%)–catalyzed rearrangement to alkylamino diaryl sulfones. Similar treatment of their unalkylated analogs typically leads only to hydrolysis. Surprisingly, when the unalkylated benzene sulfonanilides react with triflic acid, rearrangement to sulfones does occur.

Fries rearrangement of arylsulfonates and sulfonanilides under microwave irradiation

Fries rearrangements of arylsulfonates and sulfonanilides under microwave irradiation afforded hydroxy and aminoaryl sulfones respectively in very short times and in excellent yields. The conversion showed high selectivity to produce 2- and 4- hydroxyaryl sulfones as the major and minor products respectively from arylsulfonates and 2-aminoaryl sulfones exclusively from aryl sulfonanilides.