Halogenation of β-keto-sulfones using KX/H2O2in aqueous medium: Synthesis of α-halo β-keto-sulfones and α-halomethyl sulfones

Controlled α-mono- and α,α-di-halogenation of alkyl sulfones using reagent–solvent halogen bonding

The direct and selective α-halogenation of alkyl sulfones was achieved via base-mediated electrophilic halogenation, where reagent–solvent halogen bonding was found to control the selectivity through alteration of the effective size of the halogen source.

KI-mediated radical multi-functionalization of vinyl azides: a one-pot and efficient approach to β-keto sulfones and α-halo-β-keto sulfones

Transition metal-free oxidative coupling of vinyl azides with sulfonyl hydrazines is described.