Photoredox-catalyzed sulfonylation of diaryliodonium salts with DABSO and silyl enolates involving the insertion of SO2.

A versatile photoredox-catalyzed three-component sulfonylation of diaryliodonium salts with DABSO and silyl enolates involving the insertion of SO2 was developed. Moreover, by employing ß-alkyl substituted silyl enolates as substrates, the sulfonylation would give α-alkyl substituted ß-keto sulfones, which are difficult to accessed by previous method involving the insertion of SO2.

Palladium-Catalyzed C2-Selective Direct Arylation of Benzo[b]thiophene 1,1-Dioxides with Arylboronic Acids.

A novel oxidative cross-coupling of benzo[b]thiophene 1,1-dioxides with arylboronic acids was reported. The efficient reaction occurred at the C2-position via C-H activation, followed by Pd(II)-catalyzed arylation. Furthermore, a series of C2-arylated products with significant photoluminescence properties have been synthesized and characterized, which illustrates the potential applications of our method in the aggregation-induced emission field.