Copper-Catalyzed Propargylic Reduction with Diisobutylaluminum Hydride

Cu-Catalyzed Hydrodechlorination of Unactivated Alkyl Chlorides Using Diisobutylaluminum Hydride

A copper-catalyzed hydrodechlorination of primary, secondary, and tertiary alkyl chlorides using diisobutylaluminum hydride is reported. This catalytic system offers a broad substrate scope, high yields, and good functional group tolerance. Mechanistic investigations indicated that the reaction predominantly proceeds via a radical pathway, as supported by radical clock experiments. Importantly, this study provides a new approach for the selective hydrodechlorination of unactivated alkyl chlorides and expands the utility of Cu-hydride catalysis in sustainable chemical synthesis.

Copper-Catalyzed Hydroalumination of Allenes with Diisobutylaluminum Hydride: Synthesis of Allylic Ketones with α-Quaternary Centers via Tandem Allylation/Oppenauer Oxidation

An efficient and straightforward approach to allylaluminum reagent synthesis through Cu-catalyzed hydroalumination of readily accessible allenes with diisobutylaluminum hydride is described. The N-heterocyclic carbene-based copper complex promotes hydride addition to various functionalized allenes under mild reaction conditions. The catalytic reaction is applied to a highly selective one-pot synthesis of allylic ketones with α-tertiary and α-quaternary centers through tandem nucleophilic addition of in situ-generated allylaluminums to aldehydes/Oppenauer oxidation.