Studies on the Syntheses of N-Heterocyclic Compounds. XXIII. The Photochemical Reaction of Polyazanaphthalene Derivatives

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Photochemical reactions of tetraazanaphthalene derivatives, I, II, and III, with alcohols and cyclic ethers in the presence of photosensitizer resulted in selective addition at the 3, 4 C=N bond to give substituted-3, 4-dihydro derivatives. Potential diuretic activity was shown by many of the obtained compounds.