Photoreactions of aromatic compounds. Part XX: The photosubstitution of nitronaphthalenes in alkaline media

Abstract
The photoreactions of some methoxynitro‐, dimethoxynitro‐ and dinitronaph‐thalenes in alkaline medium are described. From the reactions observed (substitution of OCH3 or NO2 by OH) it appears that in the excited state of the naphthalene derivatives a nitro group in the one ring exerts a definite activating influence also on positions in the other ring. In these reactions specific “meta‐activation” was established.