Preparation of some dimethylaminocyclohexa-1,3-dienes and their reactions with αβ-unsaturated ketones
Abstract
Metal–ammonia reduction of an NN-dimethyl-aniline usually gives the cyclohexadiene of type (1). These enamines react with αβ-unsaturated ketones to give initially a 2-substituted cyclohexenone [e.g.(4)] or a hydronaphthalene ketone [e.g.(3)].