Organocatalytic α-Allylation of α-Branched Aldehydes by Synergistic Catalysis of Brønsted Acids and Amines

Herein, we describe the first, fully organocatalytic Tsuji–Trost-type direct α-allylation of α-branched aldehydes by the combined use of N-triflyl amides and secondary amines. Aliphatic, aromatic aldehydes as well as allyl alcohols are converted into the corresponding α-allylated products in moderate to high yields.