In an effort to develop synthetic procedures for the preparation of 2-substituted 5-azaindoles, the synthesis and cyclization reactions of acetylenic aminopyridines was explored. A novel method for the synthesis of 2-substituted 5-azaindoles via a transition metal catalyzed reaction is described.
[Power, David P.; Lozach, Olivier; Meijer, Laurent; Grayson, David H.; Connon, Stephen J. Bioorganic and Medicinal Chemistry Letters, 2010 , vol. 20, # 16 p. 4940 - 4944]
