70197-09-0

Upstream product

• 58567-43-4 4-methyl-N-(1-phenyl-allyl)-benzenesulfonamide 
• 2941-20-0 1-phenylpropylamine 
• 98-59-9 p-toluenesulfonyl chloride 
• 111047-55-3 4-m ethyl-N-(1-phenyl-propylidene)benzenesulfonamide 
• 97-94-9 triethyl borane 
• 51608-60-7 phenyl N-tosyl imine 
• 109-99-9 tetrahydrofuran 
• 51608-60-7 N-(benzylidene)-p-methylbenzenesulfonamide 
• 557-20-0 diethylzinc 
• 110-82-7 cyclohexane 
• 24395-14-0 N-(p-tolylsulfonyl)-2-phenylaziridine 
• 917-54-4 methyllithium 
• 873-66-5 1-propenylbenzene 
• 70-55-3 toluene-4-sulfonamide 

Downstream Products

• 1576-37-0 N-benzyl-p-toluenesulfonamide 
• 111047-55-3 4-m ethyl-N-(1-phenyl-propylidene)benzenesulfonamide 

Relevant academic research and scientific papers

Direct Synthesis of α-Amino Nitriles from Sulfonamides via Base-Mediated C-H Cyanation

Herein, we disclose a transition-metal-free reaction system that enables α-cyanation of sulfonamides through C-H bond cleavage for the preparation of α-amino nitriles, including difficult-to-access all-alkyl α-tertiary scaffolds. More than 50 substrate examples prove a wide functional group tolerance. Additionally, its synthetic practicality is highlighted by gram-scalability and the late-stage modification of natural compounds. Mechanistic experiments suggest that this process involves in situ formation of an imine intermediate via base-promoted elimination of HF.

Site-Selective Electrochemical Benzylic C?H Amination

C?H/N-H cross-coupling is an ideal strategy to synthesize various amines but remains challenging owing to the requirement for sacrificial chemical oxidants and the difficulty in controlling the regio- and chemo-selectivity. Herein we report a site-selective electrochemical amination reaction that can convert benzylic C?H bonds into C-N linkages via H2 evolution without need for external oxidants or metal catalysts. The synthetic strategy involves anodic cleavage of benzylic C?H to form a carbocation intermediate, which is then trapped with an amine nucleophile leading to C?N bond formation. Key to the success is to include HFIP as a co-solvent to modulate the oxidation potentials of the alkylbenzene substrate and the aminated product to avoid overoxidation of the latter.

Boron-Catalyzed N-Alkylation of Arylamines and Arylamides with Benzylic Alcohols

A sustainable boron-based catalytic approach for chemoselective N-alkylation of primary and secondary aromatic amines and amides with primary, secondary, and tertiary benzylic alcohols has been presented. The metal-free protocol operates at low catalyst loading, tolerates several functional groups, and generates H2O as the sole byproduct. Preliminary mechanistic studies were performed to demonstrate the crucial role of boron catalyst for the activation of the intermediate dibenzyl ether and to identify the rate-determining step.

Radical aminomethylation of imines

Taking advantage of the high level of performance of N-alkoxycarbonyl-imines, we achieved the first example of addition of the aminomethyl radical to imine. The reaction efficiency depended on the structure of the radical precursor, whether it is an iodide or a xanthate, and an electron-withdrawing group on the nitrogen atom of the radical. This reaction allows direct introduction of an N-substituted aminomethyl group onto imine to provide 1,2-diamine as well as the short-step synthesis of ICI-199,441.

Au(iii)-catalyzed intermolecular amidation of benzylic C-H bonds

Au(iii)-catalyzed intermolecular amidations of benzylic C-H bonds with sulfonamides and carboxamides are described. The protocol with the Au-bipy complex/N-bromosuccinimide system provides practical applications for synthesis of various amides via C-H activations. The reaction proceeds with high efficiency to give the corresponding amines, which are extremely useful synthetic intermediates.

FeCl3-catalyzed addition of nitrogen and 1,3-dicarbonyl nucleophiles to olefins

A direct intermolecular addition of nitrogen and 1,3-dicarbonyl nucleophiles to stabilized double bonds (styrenes, 1,3-dienes, enol-ethers, sugars.) in the presence of green and inexpensive FeCl3 catalyst is described.

Gold versus silver-catalyzed intermolecular hydroaminations of alkenes and dienes

Comparative studies about the hydroamination of unactivated alkenes and dienes catalyzed by either cationic gold(I) triphenyl phosphite complexes or silver salts were performed using sulfonamides, anilines and carbamates as nucleophiles. Gold-catalyzed reactions generally, need lower loadings than those carried out with silver salts. Simple alkenes react only with sulfonamides and weak aromatic amines such as p-nitroaniline, whereas for conjugated dienes carbamates can also be used. Carbon-carbon double bond isomerization is observed only with gold similarly to when triflic acid was used, affording mixtures of regioisomeric products in the same cases. Silver-catalyzed hydroaminations failed with terminal alkenes, except with styrenes. Conjugate dienes can be hydroaminated either at 85 °C in toluene or at room temperature in dichloromethane. Non-conjugated 1,4- and 1,5-dienes suffer double hydroamination leading to saturated N-tosylated heterocyclic amines The catalytic cycle for the silver(I)-catalyzed hydroamination process has been computationally analyzed, resembling gold(I)-catalyzed processes, although with some significant differences. Copyright

Solvent-free amination of secondary benzylic alcohols with N-nucleophiles catalyzed by FeCl3

A general, simple, and environmentally friendly method for the direct amination of secondary benzyl alcohols with amides or 4-nitroaniline is described. This method has been applied to a variety of substrates, and the reaction proceeded smoothly at room temperature under solvent-free conditions. CbzNH2 was proved to be very useful in the direct preparation of the benzylic amines from corresponding alcohols.

Enantioselective nickel-catalyzed reductive coupling of alkynes and imines

The nickel-catalyzed reductive coupling of alkynes and imines with Et 2Zn as a reductant by using electron-rich phosphine ligands has been developed, affording various allylic amines with high yields and excellent chemoselectivities. Chiral induction was also achieved in this reductive coupling reaction when a nickel catalyst containing a chiral spiro phosphine ligand was used.

Sulfonylamidation of alkylbenzenes at benzylic position with p-toluenesulfonamide and 1,3-diiodo-5,5-dimethylhydantoin

Treatment of alkylbenzenes with p-toluenesulfonamide and 1,3-diiodo-5,5-dimethylhydantoin (DIH) in a small amount of carbon tetrachloride at 60 °C gave the corresponding α-p-toluenesulfonylamido)alkylbenzenes in good to moderate yields. The present reaction is a simple method for the α-sulfonylamidation of the benzylic position in alkylbenzenes.