Abstract

AbstractCatalytic hydrogenation of enones and enals in the presence of aldehyde and ketone partners results in the formation of aldol products. A key feature of such hydrogen‐mediated C−C bond formations relates to the heterolytic activation of elemental hydrogen by cationic rhodium(I) complexes, that enables monohydride‐based catalytic cycles for which direct alkyl‐hydrogen reductive elimination pathways are disabled. Here, a concise overview of catalytic hydrogen‐mediated aldol condensation is presented. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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