Organic chemistry honors Icilio Guareschi (1847-1918) with three eponymic reactions, the best known ones being the Guareschi synthesis of pyridones and the Guareschi-Lustgarten reaction. A third Guareschi reaction, the so-called "Guareschi 1897 reaction", is one of the most unusual reactions in organic chemistry, involving the radical-mediated paradoxical aerobic generation of hydrocarbons in near-neutral water solution. A discussion of the mechanism of this amazing reaction, the only metal-free process that generates hydrocarbons, and the implications of the approach in biology and geosciences mirrors the multifaceted scientific personality of the discoverer.
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