Synthesis of aza-heterocycles from oximes by amino-Heck reaction

Abstract

Oxidative addition of oximes to palladium(0) complexes generates alkylideneaminopalladium(II) species, which are utilized as key intermediates for carbon-nitrogen bond formation. Various aza-heterocycles, such as pyrrole, pyridine, isoquinoline, spiroimine, and azaazulene, can be synthesized from O-pentafluorobenzoyloximes having an olefinic moiety via an intramolecular Heck-type reaction (amino-Heck reaction) by treatment with a catalytic amount of a Pd(0) complex.