Synthesis of β-keto sulfones via a multicomponent reaction through sulfonylation and decarboxylation

A copper(i)-catalyzed synthesis of β-keto sulfones through reaction of aryldiazonium tetrafluoroborates, 3-arylpropiolic acids, sulfur dioxide, and water is realized. This reaction proceeds through a tandem radical process involving sulfonylation and decarboxylation.

Iodine-catalyzed Sulfonylation of Arylacetylenic Acids and Arylacetylenes with Sodium Sulfinates: Synthesis of Arylacetylenic Sulfones

A highly efficient and generally applicable iodine-catalyzed reaction of arylacetylenic acids and arylacetylenes with sodium sulfinates for the synthesis of arylacetylenic sulfones was developed. The methodology has the advantages of a metal-free strategy, easy to handle reagents, functional group tolerance, a wide range of arylacetylenic acids and arylacetylenes, and easy access to arylacetylenic sulfones.

Radical-based regioselective cross-coupling of indoles and cycloalkanes

An investigation on regiochemistry of radical functionalization of indoles using cycloalkanes through di-tert-butyl peroxide (DTBP)-promoted C(sp³)–H activation was conducted. A wide range of indoles bearing substituents at different position was functionalized directly with simple cycloalkanes in moderate to high regioselctivity.

Visible light photocatalysis with CBr4: a highly selective aerobic photooxidation of methylarenes to aldehydes

An efficient, operationally simple, metal-free strategy for the selective oxidation of methylarenes to aromatic aldehydes through visible light photocatalysis employing CBr₄ and molecular oxygen is reported.

Mn(iii)-mediated regioselective synthesis of (E)-vinyl sulfones from sodium sulfinates and nitro-olefins

A new efficient Mn(iii)-mediated coupling reaction of sodium sulfinates with nitro-olefins is described.

O2-mediated C(sp2)–X bond oxygenation: autoxidative carbon–heteroatom bond formation using activated alkenes as a linkage

An aerobic dehalogenative oxygenation reaction under mild and simple conditions towards a series of valuable β-keto compounds was developed, in which dioxygen serves as the sole promoter.

Tetrabutylammonium iodide-catalyzed oxidative coupling of enamides with sulfonylhydrazides: synthesis of β-keto-sulfones

A novel synthetic route toward pharmaceutically interesting β-keto-sulfone derivativesviaTBAI/TBHP-mediated oxidative coupling of readily prepared enamides with sulfonylhydrazides is described.

Catalytic and direct methyl sulfonylation of alkenes and alkynes using a methyl sulfonyl radical generated from a DMSO, dioxygen and copper system

A methyl sulfonyl radical generated from DMSO in the presence of catalytic Cu(i) under O₂ atmosphere is used to carry out methyl sulfonation of C–C unsaturated bonds to afford β-keto methyl sulfones and (E)-vinyl methyl sulfones.

Iron-catalyzed direct difunctionalization of alkenes with dioxygen and sulfinic acids: a highly efficient and green approach to β-ketosulfones

A novel and efficient iron-catalyzed direct difunctionalization of alkenes with sulfinic acids and dioxygen for the synthesis of β-ketosulfones has been developed.