2-Hydroxy-3-aminophenazine

The silver dye bleach reaction is very slow (65MI11401), and an additional agent is needed to promote the reaction between the immobile silver image and the immobile dye. 1,4-Diazines have been used as catalysts for this reaction, 2,3-dimethylquinoxaline (65), 2,3-diphenylpyrazine (66) and 2-hydroxy-3-aminophenazine (67) being specific examples. 

Hydroxy-3-aminophenazine and 2,3-diaminophenazine levels in carbendazim formulations were determined using a separation generated on a Cig column (A = 254 nm) and a 75/25 water (25 mM K2HPO4 pH 7.5 with H3P04)/acetonitrile acetonitrile mobile phase. The aminophenazine was badly tailed and the peaks were not fully resolved. Elution time was 14 min. A better choice of mobile phase might have included TEA or THE as mobile phase modifiers. Standard solutions from 0.1 to 10 ppm were used and a limit of quantitation of 0.71 ppm and limit of detection of 0.6 ppm were reported [999]. 

Kelaidopoulou A, Abelidou E, Kokkinidis G (1999) Electrocatal54ic oxidation of methanol and formic acid on dispersed electrodes Pt, Pt-Sn and Pt/M (upd) in poly(2-hydroxy-3-aminophenazine). J Appl Electrochem 29 1255-1261... 

Poly (2-hydroxy-3-aminophenazine) Metal clusters (Au) Electrocatalysis 639, 640... 

On the other hand, there is at least one case of an aromatic amine without a hydroxy group in the 2-position, namely 1-aminophenazine (2.29) which, after the initial diazotization, is oxidized within minutes by air or additional nitrous acid to the quinone diazide 2.31 (Olson, 1977). 

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