“…Transition metal-catalyzed intermolecular [4+2] annulation of ketoximes via directing C–H activation has proven to be an efficient method for the synthesis of pyridines, isoquinolines, and isoquinolinones . The O -acyl ketoxime bearing an α-C(sp 3 )–H can also act as an N–C–C synthon in [3+ n ] reactions with a different coupling partner to give various five-, six-, and seven-membered heterocycles, including pyrroles, pyrrolines, oxazoles, isoxazolines, thiazoles, imidazoles, pyrazoles, pyrazolines, triazoles, pyrrolinones, pyridines, , pyridones, quinolines, and tetrahydroazepines …”