HETEROCYCLIC SPIROCYCLOHEXADIENONES .3.

With N-methyl-naphthylamine 3-substituted 2-naphthol derivatives give the corresponding spirocyclohexadienones in good yields; 9-phenanthrol also proceeds analogously. 4-Substituted 1-naphthols react similarly but the spiroketones thus obtained are more labile and are formed in m inor yields. From the behavior of spirocyclohexadienones with protonic acids, carbonyl reagents and complex hydrides a reaction mechanism is deduced.