A ferrocenium boronic acid salt activates allylic alcohols to generate "transient carbocations that react with in situ-generated chiral enarnines from liranthed aldehydes. The optimized conditions afford the desired acyclic products embedding a methyl-aryl quaternary carbon center with up to 90% yield and 97:3 ehantiorneric ratio, with only water as the byproduct. This noble-metal-free method complements alternative methods that are incompatible with carbon-halogen bonds and other sensitive functional grOupS.