Abstract
Room temperature introduction of fluorine atom into organic molecules has received great attention in the last twenty years. Xenon difluoride and caesium fluoroxysulphate are the two most easily handled reagents up to now for mild introduction of fluorine. Both reagents in reactivity, while their behaviour strongly depends on the structure of the organic molecule, catalyst used, solvent and temperature.We report our results on room-temperature reactions of XeF2 in CH2Cl2 in the presence of HF and CsSO4F in CH3CN with various aromatic and aliphatic aldehydes. The courses of the reactions differ markedly, while XeF2 reactions resulted in rearranged ethers, CsSO4F transformed aldehydes to acid fluorides. ▪
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