Als biomimetische Modellreaktion wird die Kinetik der Oxidation der 4 Titelverbindungen durch die Flavine (I)‐(III) untersucht, wobei letztere jeweils zum 1,5‐Dihydroflavin reduziert werden.

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It was found that 8-octyl mercaptoflavin forms a dimer in aqueous solution, and the absorption spectrum is quite similar to that of the corresponding bis-flavin linked by -(CH2)3- at 10,10′-positions of the isoalloxazine rings. The association mode and the reactivity for oxidation of N-benzyl-1,4-dihydronicotinamide(BNAH) are discussed.

Several bis-flavins linked at 10,10′-positions of isoalloxazine rings were synthesized. The reactivity of each flavin of a bis-flavin was found to be considerably influenced by another intramolecular flavin moiety, depending on the conformation of the bis-flavin.

Syntheses and Reactivity of Bisflavins.