Direct β-Alkylation of Ketones and Aldehydes via Pd-Catalyzed Redox Cascade
作者:Chengpeng Wang、Guangbin Dong
DOI:10.1021/jacs.8b03530
日期:2018.5.16
report a direct β-alkylation of ketones and aldehydes with simple alkyl bromides through a Pd-catalyzed redox-cascade strategy. The use of a Cu cocatalyst is important for improved efficiency. The reaction is redox-neutral, without the need for strong acids or bases. Both cyclic and acyclic ketones, as well as α-branched aldehydes, are suitable substrates for coupling with secondary and tertiary alkyl
3-Methylcar-4-en-2-one has been shown to undergo ring opening to give 1-methyl-p-methane derivatives on treatment with reagents with attack cyclopropyl ketones, e.g. dissolving metals or mineral acids. The direction of ring opening appears to be controlled by stereo-electronic factors.