6380-03-6

Upstream product

• 98-59-9 p-toluenesulfonyl chloride 
• 108-44-1 1-amino-3-methylbenzene 
• 591-17-3 meta-bromotoluene 
• 70-55-3 toluene-4-sulfonamide 
• 625-95-6 3-Iodotoluene 
• 591-24-2 3-Methylcyclohexanone 
• 50817-54-4 2-methyl-6-[(4-methylphenyl)sulfonamido]benzoic acid 
• 941-55-9 4-toluenesulfonyl azide 
• 108-88-3 toluene 
• 99-08-1 1-methyl-3-nitrobenzene 
• 1576-35-8 toluene-4-sulfonic acid hydrazide 
• 21849-40-1 dibromamine-T 
• 17933-03-8 m-tolylboronic acid 
• 4083-64-1 Tosyl isocyanate 

Downstream Products

• 187601-80-5 N-toluene-4-sulfonyl-N-m-tolyl-β-alanine 
• 109286-36-4 toluene-4-sulfonic acid-(2,4-dibromo-5-methyl-anilide) 
• 108989-39-5 toluene-4-sulfonic acid-(2,4,6-tribromo-3-methyl-anilide) 
• 109185-93-5 2-nitro-toluene-4-sulfonic acid-(3-methyl-2,4-dinitro-anilide) 
• 111442-84-3 4-[N-(toluene-4-sulfonyl)-m-toluidino]-butyronitrile 
• 106508-45-6 N-(4-Tolylsulfonyl)-4-nitro-3-toluidine 
• 735271-13-3 N-(6-methyl-5-trimethylsiloxy-5-phenyl-3-heptynyl)-N-(p-toluenesulfonyl)-m-methylaniline 
• 735271-12-2 N-(5-trimethylsiloxy-5,5-diphenyl-3-pentynyl)-N-(p-toluenesulfonyl)-m-methylaniline 
• 1207865-29-9 C₂₀H₂₇NO₃S 
• 1308656-58-7 C₂₁H₂₅NO₄S 

Relevant academic research and scientific papers

Lewis Acid Regulated Divergent Catalytic Reaction between Quinone Imine Ketals (QIKs) and 1,3-Dicarbonyl Compounds: Switchable Access to Multiple Products Including 2-Aryl-1,3-Dicarbonyl Compounds, Indoles, and Benzofurans

A catalytic Lewis acid regulated reaction between quinone imine ketals (QIKs) and 1,3-dicarbonyl compounds provides a divergent and tunable approach to a variety of skeletons, including a series of 2-aryl-1,3-dicarbonyl compounds, indoles, and benzofurans. The use of lithium chloride and ferrous bromide gives C3- or C2-alkylation products of the QIKs. The combination of ferrous bromide and trifluoromethanesulfonic acid delivers indole derivatives. Sequential hydrolysis and C3-alkylation occur in the presence of ytterbium (III) trifluoromethanesulfonate and stoichiometric amounts of water. When the reaction is performed with trifluoromethanesulfonic acid and stoichiometric amounts of water, benzofuran is obtained. This protocol utilizes mild conditions, exhibits regio- and chemoselectivity, and has broad functional group tolerance. (Figure presented.).

Facile synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazides

A simple and rapid method for efficient synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazide with NXS (X = Cl or Br) and late-stage conversion to several other functional groups was described. A variety of nucleophiles could be engaged in this transformation, thus permitting the synthesis of complex sulfonamides and sulfonates. In most cases, these reactions are highly selective, simple, and clean, affording products at excellent yields.

Copper-catalyzed redox coupling of nitroarenes with sodium sulfinates

A simple copper-catalyzed redox coupling of sodium sulfinates and nitroarenes is described. In this process, abundant and stable nitroarenes serve as both the nitrogen sources and oxidants, and sodium sulfinates act as both reactants and reductants. A variety of aromatic sulfonamides were obtained in moderate to good yields with broad substrate scope. No external additive is employed for this kind of transformation.

Characteristic Hydrogen Bonding Observed in the Crystals of Aromatic Sulfonamides: 1D Chain Assembly of Molecules and Chiral Discrimination on Crystallization

N-Phenylbenzenesulfonamides exist preferentially in (+)- or (-)-synclinal conformations, which place the aromatic rings at both ends in the same direction with a twist. We have systematically analyzed the crystal structure of secondary aromatic sulfonamides bearing methyl, ethyl, and/or methoxy groups on the benzene rings. Intermolecular hydrogen bonding between the sulfonamide protons and sulfonyl oxygens was observed in 81 out of 85 crystals. The intermolecular hydrogen-bonding patterns could be classified into four types, i.e. Dimeric, Zigzag, Helical, and Straight patterns, with retention of the synclinal conformation of the sulfonamide moiety. We investigated the relationship between the hydrogen-bonding pattern and the proportion of the compounds that show chiral crystallization. On the basis of our classification of the intermolecular hydrogen bonds of aromatic sulfonamides, the crystals with Dimeric and Zigzag patterns, which both have enantiomeric synclinal conformers, intrinsically become achiral, except for kryptoracemates. In contrast, a high proportion of compounds with Helical or Straight patterns in the crystals showed chiral crystallization. Our classification is useful for discussion regarding the chirality of molecular assemblies, on the basis of the conformational chirality of the molecules in the crystal.

Selective C(sp2)-H Amination Catalyzed by High-Valent Cobalt(III)/(IV)-bpy Complex Immobilized on Silica Nanoparticles

High-valent cobaltIV-bpy complex stabilized in silica matrix was detected as catalytically active form and intermediate in cobalt-mediated oxidative C?H/NH cross-coupling reaction. These CoIV species prepared by electrooxidation of CoIII(bpy)3-doped silica nanoparticles (SNs) at relatively low anodic potentials have demonstrated high catalytic activity. Both size and architecture of the SNs are highlighted as the factors beyond the complex structure affecting its oxidation potential and catalytic efficiency. The factors have been optimized for the catalyst with high efficiency, easy separation and reusability for 7 times at least. The optimal nanocatalyst (1 mol%) provides 100 % conversion of reactants in a single step of ligand-directed coupling of H2NTs with arenes under electrochemical regeneration conditions. The results emphasize both synthetic route for efficient embedding of CoIII(bpy)3 into silica support and the electrochemical generation of CoIV complexes as a facile route for developing the efficient nanocatalyst of oxidative functionalization. The observed reactivity has the potential in development of Co-catalyzed coupling reactions.

Transition-metal-free synthesis of aromatic amines via the reaction of benzynes with isocyanates

An unexpected reaction between benzynes and isocyanates to generate aromatic amines has been developed under transition-metal-free conditions. The in situ prepared anions formed through cleavage of the N–C bond in isocyanates, reacted with aryne precursor

CuI catalyzed sulfamidation of arylboronic acid using TsNBr2 at room temperature

An expeditious protocol for amidation arylboronic acid has been developed using TsNBr2 as the nitrogen source in presence of a CuI as catalyst. Various arylboronic acids could be transformed into corresponding N-arylsulfonamide derivatives within a very short time using CuI as catalyst in presence of DBU at room temperature.

Palladium nanoparticles as reusable catalyst for the synthesis of N-aryl sulfonamides under mild reaction conditions

An efficient palladium nanoparticles-catalyzed N-arylation of sulfonamides and sulfonyl azides is described. This procedure serves as an active protocol for intermolecular C-N bond formation using Pd(OAc)2 in PEG-400 under air. Aryl bromides and triflates react at 35°C, while aryl chlorides require heating to 50°C and give the desired products only in low yields. This reaction proceeds smoothly in acceptable yields using low catalyst loading.

NH4I-Catalyzed Synthesis of Sulfonamides from Arylsufonylhydrazides and Amines

A novel and efficient approach to sulfonamides has been developed. Using TBHP as the oxidant and NH4I (20 mol%) as the catalyst, arylsulfonyl hydrazides reacted with amines to provide sulfonamides in moderate to good yields. Possible reaction pathway for the formation of the products was also discussed in this paper. Sulfonimides were synthesized through the oxidation coupling of arylsufonylhydrazides and amines by TBHP/NH4I system in moderate to good yields.

Palladium-catalyzed N-arylsulfonamide formation from arylsulfonyl hydrazides and nitroarenes

A palladium-catalyzed construction for N-arylsulfonamide from nitroarenes and arylsulfonyl hydrazides is developed. In this protocol, abundant and stable nitroarenes serve as the nitrogen sources by in situ reduction reaction of hydrogen released from arylsulfonyl hydrazides. No external oxidants or reductants are needed for this kind of transformation.