Neue Wege zu 1H‐ und 2H‐Pyrrolen

Abstract
New Routes to 1H‐ and 2H‐PyrrolesA synthesis of 1H‐pyrroles is described starting with pyridine analogues of chalcones and involving the reaction of acetic anhydride with 1‐pyrroline‐1‐oxides. Another route leads from 1‐pyrrolines to 2 H‐pyrroles via bromination with N‐bromosuccinimide and subsequent dehydrobromination in dimethylformamide.