multicomponent tandem Strecker–γ-umpolung-addition reaction has been developed, which provides a facileaccess to functionalized allylic α-aminonitriles. The reaction is highly efficient, rapid, versatile and economical, and it is hoped that it will find great practical application in organic synthesis. The first phosphine-catalyzed multicomponent tandem Strecker–γ-umpolung-addition reaction has been developed