30749-64-5

Upstream product

• 623-73-4 diazoacetic acid ethyl ester 
• 34176-08-4 sodium 4-bromobenzenesulfinate 
• 98-58-8 4-bromobenzenesulfonyl chloride 
• 105-39-5 chloroacetic acid ethyl ester 
• 2297-64-5 p-bromophenylsulfonyl hydrazide 
• 141-97-9 ethyl acetoacetate 

Downstream Products

• 3406-73-3 (4-bromo-benzenesulfonyl)-acetic acid 
• 212769-84-1 2-(4-bromo-benzenesulfonyl)-2-methyl-3-[4-(2-piperidine-1-yl-ethoxy)-phenyl]-propionic acid ethyl ester 

Relevant academic research and scientific papers

Cross coupling of sulfonyl radicals with silver-based carbenes: A simple approach to β-carbonyl arylsulfones

A coupling reaction between sulfonyl radicals and silver-based carbenes has been well established. This simple radical-carbene coupling (RCC) process provided an efficient approach to a variety of β-carbonyl arylsulfones from sodium arylsulfinates and diazo compounds, and was characterized by wide substrate scope, easy scale-up, simple manipulation, accessible starting materials, and mild reaction conditions.

Switching of Sulfonylation Selectivity by Nature of Solvent and Temperature: The Reaction of β-Dicarbonyl Compounds with Sodium Sulfinates under the Action of Iron-Based Oxidants

Selectivity of sulfonylation of β-keto esters with sodium sulfinates under the action of iron(III) salts as oxidants can be regulated by the type of solvent used and the reaction temperature. α-Sulfonyl β-keto esters are obtained when the process is conducted in THF/H2O solution at 40 °C. The change of the solvent to iPrOH/H2O and refluxing of a reaction mixture provides α-sulfonyl esters – the products of successive sulfonylation-deacylation. When β-diketones are applied as starting materials, only α-sulfonyl ketones are formed. The reaction pathway includes sulfonylation of dicabonyl compounds under the action of Fe(III) to form α-sulfonylated dicarbonyl compounds, which are then attacked by a solvent as the nucleophile, resulting in the products of successive sulfonylation-deacylation. Participation of the solvent in the reaction pathway determines the products structure.

Efficient synthesis of aliphatic sulfones by Mg mediated coupling reactions of sulfonyl chlorides and aliphatic halides

Sulfonyl chlorides were reduced to anhydrous sulfinate salts with magnesium under sonication. These sulfinates were alkylated to sulfones with alkyl chlorides in the presence of catalytic sodium iodide under sonication. A variety of aliphatic sulfones was efficiently prepared by this one-pot two-step procedure.

Bu4NI-Catalyzed Cross-Coupling between Sulfonyl Hydrazides and Diazo Compounds to Construct β-Carbonyl Sulfones Using Molecular Oxygen

A new cross-coupling reaction between sulfonyl hydrazides and diazo compounds has been established, leading to a variety of β-carbonyl sulfones in good yields. This methodology was distinguished by simple manipulation, easily available starting materials, and wide substrate scope. A plausible mechanism involving a radical process was proposed based upon the experimental observations and literature.

An efficient electrochemical synthesis of β-keto sulfones from sulfinates and 1,3-dicarbonyl compounds

An efficient electrochemical synthesis of β-keto sulfones from sulfinates and 1,3-dicarbonyl compounds has been developed. The present electrochemical route could afford the target products in high to excellent yields under mild conditions.