Formation of C=N bonds by the release of H2: a new strategy for synthesis of imines and benzazoles.

A new strategy for synthesis of imines using the approach of release of H-2 has been developed. This oxidant-and acceptor-free Pd/C catalysis protocol is further applied to synthesis of benzoxazoles, benzimidazoles, and benzothiazoles through a one-pot cascade reaction with notably high yields.