An Alumino‐Mannich Reaction of Organoaluminum Reagents, Silylated Amines, and Aldehydes

: A multi-component coupling using organoaluminum reagents, silylated amines, and aldehydes results in the formation of tertiary amines. Both alkenyl- and alkylaluminum reagents undergo reaction with iminium ion substrates for which the corresponding Petasis borono-Mannich reactions are unsuccessful.