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Tuning Selectivity in Terpene Chemistry: Selective Hydrogenation versus Cascade Reactions over Copper Catalysts

Federica Zaccheria, Nicoletta Ravasio, A. Fusi, M. Rodondi, Rinaldo Psaro

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Abstract

Abstract The selectivity of Cu/Al2O3 under very mild catalytic hydrogenation conditions can be tuned only by switching the solvent. Geraniol can be converted in a one‐pot one‐step process into a mixture of citronellol and menthol in hydrocarbon solvents or reduced to citronellol with 98% selectivity in 2‐propanol without any additive. Both reactions can be applied to essential oils or synthetic mixtures containing geraniol, citronellal and nerol.

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What this paper is about

Abstract The selectivity of Cu/Al2O3 under very mild catalytic hydrogenation conditions can be tuned only by switching the solvent. Geraniol can be converted in a one‐pot one‐step process into a mixture of citronellol and menthol in hydrocarbon solvents or reduced to citronellol with 98% selectivity in 2‐propanol without any additive. Both reactions can be applied to essential oils or synthetic mixtures containing geraniol, citronellal and nerol.

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Available abstract

Abstract The selectivity of Cu/Al2O3 under very mild catalytic hydrogenation conditions can be tuned only by switching the solvent. Geraniol can be converted in a one‐pot one‐step process into a mixture of citronellol and menthol in hydrocarbon solvents or reduced to citronellol with 98% selectivity in 2‐propanol without any additive. Both reactions can be applied to essential oils or synthetic mixtures containing geraniol, citronellal and nerol.

Key concepts: Nerol, Citronellol, Chemistry, Geraniol, Citronellal, Selectivity, Catalysis, Organic chemistry

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