cycloaddition reaction of 1-dimethylaminomethyl-2-naphthol and 2-dimethylaminomethyl-4,5-dimethylphenol with (un)substitutedstyrenes were investigated. 3,4-Dihydro 2-(un)substitutedphenyl-2H-benzo[f]chromenes and 2-(un)substitutedphenyl-6,7-dimethylchromans were isolated from the reaction of 1-dimethylaminomethyl-2-naphthol and 2-dimethylaminomethyl-4,5-dimethylphenol with (un)substitutedstyrenes. The yields