ChemInform Abstract: 2‐Aza‐1,3‐dienes. Part 5. Access to N‐Aminoimidazoles, 3H‐Pyrroles, (1,2,4)Triazolo(1,5‐a)pyrazines, or Imidazo(1,2‐a)pyrazines.

Abstract

Reaction of the ester (Ia) and the nitrile (Ib) with a series of nitrogen compounds leads to formation of N‐heterocycles of type (V)‐(VII), (IX) and (XI).