Francesco Recupero

Efficient Mn–Cu and Mn–Co–TEMPO-catalysed oxidation of alcohols into aldehydes and ketones by oxygen under mild conditions

Abstract A catalytic amount of Mn(II)–Co(II) or Mn(II)–Cu(II) nitrates in combination with TEMPO allows the selective oxidation of primary and secondary alcohols to aldehydes and ketones by oxygen under very mild conditions. Mechanistic aspects are discussed. The catalyst can be considered the cheapest and the most effective for the selective aerobic oxidation of alcohols.

Approaches to the Azahelicene System: Synthesis and Spectroscopic Characterization of Some Diazapentahelicenes

The synthesis and spectroscopic characterization of some diazahelicenes is presented. The synthetic approach varies according to the location of the N-atoms; thus, three different synthetic pathways are used (Schemes 1–3). A description of UV/VIS and of fluorescence and phosphorescence emission is also reported. NMR Spectra show the importance of the distorted backbone of these molecules.

New free-radical syntheses under Gif-Barton oxidation conditions

Abstract New free-radical syntheses were developed under Gif-Barton conditions by trapping t-BuO radicals with electron-rich alkenes (vinyl ether, styrene, α-methylstyrene) and acetaldehyde.

Redox catalysis in free-radical reactions: New, simple, convenient intramolecular homolytic aromatic substitutions

Abstract Three new general, simple and convenient procedures of intramolecular homolytic aromatic substitution leading to homocyclic and heterocyclic compounds have been developed by addition of aryl or nucleophilic alkyl radicals to alkenes conjugated with electron-withdrawing groups in the presence of metal salt redox systems.

A new, highly selective synthesis of aromatic aldehydes by aerobic free-radical oxidation of benzylic alcohols, catalysed by n-hydroxyphthalimide under mild conditions. Polar and enthalpic effects.

A new selective synthesis of aromatic aldehydes is described, based on catalytic oxidation of benzyl alcohols with molecular oxygen at rt and atmospheric pressure.