Catalytic Aerobic Dehydrogenatin of <i>N</i>‐Heterocycles by <i>N</i>‐Hydoxyphthalimide

Abstract

Abstract Catalytic methods for the aerobic dehydrogenation of N ‐heterocycles are reported. In most cases, indoles are accessed efficiently from indolines using catalytic N ‐hydroxyphthalimide (NHPI) as the sole additive under air. Further studies revealed an improved catalytic system of NHPI and copper for the preparation of other heteroaromatics, for example quinolines. magnified image