The development of novel methods for the preparation of nitrogen-containing molecules has been of long-standing interest to organic chemists due to their great importance in chemistry and biology.1 Recently, we have developed some direct approaches to nitrogen-containing molecules by direct nitrogenation of simple molecules at mild conditions through oxidative C-H and C-C bond cleavage strategies employing NaN3, TMSN3, or DMF as the nitrogen source (Scheme 1).In this talk, the details of these direct transformations as well as the recent development will be presented.