The synthesis of the naturally occuring 6- and 9-hydroxyphenazine-1-carboxylic acids, (3) and (4), is described. Methyl 6-methoxyphenazine-1-carboxylate (12) is identified as a metabolite from Streptomyces luteoreticuli, and a metabolite of Pseudomonas aureofaciens is identified as 2-hydroxyphenazine-1-carboxylic acid (2) by comparison with synthetic material.
P. K. Brooke, S. R. Challand, M. E. Flood, R. B. Herbert, F. G. Holliman and P. N. Ibberson, J. Chem. Soc., Perkin Trans. 1, 1976, 2248 DOI: 10.1039/P19760002248
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