Formation of α-Amino Ketones: Addition of Acylzirconocene Chlorides to Imines Catalyzed by Yb(OTf)3/TmsOTf and Brønsted Acids and Three-Component Reactions of Acylzirconocene Chlorides, Aldehydes, and Amines
acylzirconocene chlorides react as “unmasked” acyl anion donors, was carried out under Yb(OTf)3/TMSOTf-catalyzed conditions. The same reactions were also carried out with the use of Bronsted acids as catalyst in place of Yb(OTf)3/TMSOTf. The operationally simple three-componentreaction with aldehydes, anilines, and acylzirconocene chlorides affords α-amino ketone derivatives essentially in the absence of a catalyst