Abstract
THE dihydroxyphenazine obtained by catalytic reduction of the pigment of Chromobacterium iodinum1 has been methylated. The resulting dimethoxyphenazine crystallized in yellow needles, m.p. 245–246° (found : C, 69·9 ; H, 4·4; C14H12O2N2 requires C, 70·0 ; H, 5.0 per cent). This compound differs from 1 : 4-dimethoxyphenazine2, m.p. 185°. It has been shown already that synthetic 1 : 2- and 1 : 3-dihydroxyphenazines3,4 differ from the natural product. The conclusion, therefore, is that the pigment contains the two hydroxyl groups in different benzene nuclei of the phenazine skeleton.
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Clemo, G. R., and Daglish, A. F., J. Chem. Soc. (in the press).
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CLEMO, G., DAGLISH, A. Structure of the Pigment of Chromobacterium iodinum. Nature 162, 776 (1948). https://doi.org/10.1038/162776a0
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DOI: https://doi.org/10.1038/162776a0
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