A three-component reaction of C,N-cyclic N′-acyl azomethine imines, isocyanides, and azide compounds: effective synthesis of 1,5-disubstituted tetrazoles with tetrahydroisoquinoline skeletons

A multicomponent reaction of isocyanides and C,N-cyclic N'-acyl azomethine imines in the presence of TMSCl and NaN3 leads to tetrazole derivatives. These reactions proceeded cleanly to afford the corresponding 1,5-disubstituted tetrazoles containing a tetrahydroisoquinoline skeleton in high to excellent yields.