Synthetic methods for electrophilic iodination of organic compounds using elemental iodine or various iodides are compiled in this review, and literature data for the last 10-15 years is organised according to the type of organic compound. 1 Introduction 2 Iodination of Aromatic Hydrocarbons 2.1 Unsubstituted Aromatic Hydrocarbons 2.2 Phenols and Aromatic Ethers 2.3 Aromatic Amines 2.4 Alkyl-Substituted Aromatic Hydrocarbons 2.5 Deactivated Aromatic Hydrocarbons 3 Iodination of Alkenes and Alkynes 4 Iodination of Aliphatic Hydrocarbons 5 Iodination of Organic Compounds Bearing an Enolisable Carbonyl Group 6 Iodination of Heteroatom-Containing Organic Compounds 6.1 Organoboron and Organometallic Compounds 6.2 Heterocyclic Compounds 7 Conclusions and Perspectives

Highly atom-efficient oxidation of sulfides into sulfones under solvent- and catalyst-free reaction conditions using a 30% aqueous solution of H₂O₂ at 75 °C is reported. A structurally diverse set of phenyl alkyl-, phenyl benzyl-, benzyl alkyl-, dialkyl-, heteroaryl alkyl- and cyclic sulfides were transformed into sulfones regardless of the aggregate state and electronic nature of the substituents. In spite of the heterogeneous reaction mixtures throughout the work, no difficulties with stirring and reaction progress were noted. In numerous cases, only 10 mol% excess of H₂O₂ was used, thus contributing considerably to the high atom economy of the process. Some solid substrates required a variable excess of hydrogen peroxide; however, the reactions were performed strictly without organic solvents. The transformation was demonstrated to be amenable for scale-up with both liquid and solid sulfides. In addition, isolation and purification of the crude products can be simply done with only filtration and crystallization.

Noble metals exhibit broad arrange of applications in industry and several aspects of human life which are becoming more and more prevalent in modern times. Due to their limited sources and constantly and consistently expanding demand, recycling of secondary and waste materials must accompany the traditional mineral extractions. This Minireview covers the most recent solvometallurgical developments in regeneration of Pd, Pt, Rh, Ru, Ir, Os, Ag and Au with emphasis on sustainability and selectivity. Processing—by selective oxidative dissolution, reductive precipitation, solvent extraction, co‐precipitation, membrane transfer and trapping to solid media—of eligible multi‐metal substrates for recycling from waste printed circuit boards to end‐of‐life automotive catalysts are discussed. Outlook for possible future direction for noble metal recycling is proposed with emphasis on sustainable approaches.