Sulfonyl radicals generated from sulfonylhydrazides by the Bu(4)NI-tert-butyl hydroperoxide (TBHP) catalysis system underwent addition to a variety of α-methyl styrene derivatives to give the corresponding allylic sulfones. This selective allylic sulfonylation is metal-free, operationally simple, and environmentally friendly.

A catalytic system consisting of KI, 18-crown-6, and TBHP for arylsulfonylation of activated alkenes with sulfonylhydrazides as sulfonyl precursor is described. This protocol provides a practical and environmentally benign method for the construction of sulfonated oxindoles in water.

TBAI-catalyzed oxidative coupling of β-ketoesters with carboxylic acid using TBHP as oxidant has been established. This transformation provides a facile and direct strategy for the synthesis of α-carboxylic-β-ketoesters.

Pot. -(LI*, X.; ZHOU, C.; HU, Z.; XU, X.; J. Chem. Res. 37 (2013) 9, 579-581, http://dx.doi.org/10.3184/174751913X13758803237636 ; Coll. Chem. Eng. Mater. Sci., Zhejiang Univ. Technol.,

An iodobenzene-catalysed domino route to quinoxalines from ketones and o-phenylenediamines in one pot has been developed. This transformation consisted of the generation of Koser's generation, α-tosyloxylation of ketones, nucleophilic substitution and intramolecular dehydration with o-phenylenediamines, and dehydrogenation.