Abstract
The development of new strategies for synthesis of small-sized heterocycles has remained a highly attractive but challenging proposition. An overview of the application of microwave irradiation in three- and four-nitrogen-containing six-membered heterocyclic compound synthesis is presented, focusing on the developments in the past 5–10 years. This contribution covers the literature concerning the total synthesis of N-heterocycles. The literature data are summarized based on the size of cycles.