Reactions of enamines with pentachloropyridine N-oxide; a novel ring contraction
Abstract
The reaction of 1-dialkylaminocycloalkenes with pentachloropyridine N-oxide gave tetrachloro-N-oxido-2-pyridylenamines (6) accompanied, in the cases of the cyclohexenyl and cycloheptenyl derivatives, by tetrachloro-2-pyridylcyclo-pentene (10) and -hexene (11), respectively.