224182-08-5

Upstream product

• 98-10-2 benzenesulfonamide 
• 66-99-9 β-naphthaldehyde 

Downstream Products

• 1020855-52-0 N-(cyano(naphthalen-2-yl)methyl)benzenesulfonamide 
• 1402168-53-9 C₇₇H₁₅NO₂S 
• 142482-13-1 1,2-Dihydro<60>fullerene 

Relevant academic research and scientific papers

Sulfinate-Organocatalyzed (3+2) Annulation Reaction of Propargyl or Allenyl Sulfones with Activated Imines

An operationally simple methodology for the synthesis of 4-sulfonyl-3-pyrrolines is described using a propargylic sulfone and N-sulfonyl imines as substrates. This annulation process is initiated by an arenesulfinate organocatalyst, which allows a smooth isomerization of the alkynyl precursor into the corresponding allene, followed by the generation of a highly reactive allyl sulfone anion. An asymmetric version involving an unprecedented enantiopure sulfinate–ammonium cooperative ion pair (PhSO2– R4N+*) was investigated. A proof-of-concept, with enantiomeric excesses of up to 41 %, was obtained according to a preliminary screening of commercially available chiral phase-transfer catalysts.

Silica-supported zinc chloride (ZnCl2/SiO2)-induced efficient protocol for the synthesis of N-sulfonyl imines and 2-Arylbenzothiazole

A straightforward strategy for the synthesis of N-sulfonyl imine derivatives from sulfonamides and aryl aldehydes utilizing Silica-supported zinc chloride (ZnCl2/SiO2, silzic) as a catalyst under solvent-free conditions has been developed. 2-Arylbenzothiazole derivatives were also synthesized by the reaction of 2-aminothiophenol with aryl aldehydes under the same conditions. This procedure has advantages of high yields, mild reaction condition, simple procedure, low cost, and simplicity of workup. The catalyst has the same efficiency on its reuse up to three times.

Nitroxyl-Radical-Catalyzed Oxidative Coupling of Amides with Silylated Nucleophiles through N-Halogenation

A nitroxyl-radical-catalyzed oxidative coupling reaction between amines with an N-protecting electron-withdrawing group (EWG) and silylated nucleophiles was developed to furnish coupling products in high yields, thus opening up new frontiers in organocatalyzed reactions. This reaction proceeded through the activation of N-halogenated amides by a nitroxyl-radical catalyst, followed by carbon–carbon coupling with silylated nucleophiles. Studies of the reaction mechanism indicated that the nitroxyl radical activates N-halogenated amides, which are generated from N-EWG-protected amides and a halogenation reagent, to give the corresponding imines.

3-Methyl-1-sulfonic acid imidazolium chloride as a new, Efficient and recyclable catalyst and solvent for the preparation of N-sulfonyl imines at room Temperature

New Bronsted acidic ionic liquid, 3-methyl-1-sulfonic acid imidazolium chloride {[Msim]Cl} was used as an efficient, green and reusable catalyst and solvent for the synthesis of N-sulfonyl imines via the condensation of sulfonamides with aldehydes as well

Synthesis of α-sulfanyl-β-amino acid derivatives by using nanocrystalline magnesium oxide

The Mannich-type reaction between alkyl, aryl and heterocyclic aldimines and sulfonium salts for the synthesis of α-sulfanyl-β-amino acid derivatives by using nanocrystalline magnesium oxide (NAP-MgO) is described. These products are obtained in moderate to high yields with moderate diastereoselectivities. The configuration of ethyl-3-{[(4-methylphenyl)sulfonyl] amino}-2-(methylsulfanyl)-3-(4-nitrophenyl)propanoate (major isomer) has been confirmed by X-ray diffraction technique to be anti, and consistent with the assignment based on 1H NMR spectroscopy. These α-sulfanyl- β-amino acid derivatives are important building blocks for pharmaceuticals with potent biological activity.