1, 3, 8, 10, 11, 14-Hexazapentaphene-2, 4, 7, 9(14H___-, 3H___-, 8H___-, 11H___-)-tetraones(bent double-headed 5-deazaflavins) were prepared by condensing N, N'-dialkyl-p-phynylenediamines and 6-chloro-5-formyl-3-methyluracil, and by cyclizing N, N'-dialkyl-N, N'-di(3-methyluracil-6-yl)-p___--phenylene-diamines with Vilsmeier reagent; these bent double-headed 5-dazaflavins oxidized alcohol under neutral condition in light and a remarked autorecycling occurred.
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