222-2230 with darkening. When samples of this material and the original were mixed there was no change in the melting behavior.The yellow product dissolved in alcohol with subsequent separation of colorless crystals. When dry hydrogen chloride was passed into this suspension the crystals first dissolved with subsequent separation of the yellow solid. When suspended in water or ether, the yellow substance did not dissolve but lost color immediately to give the same colorless crystals. The yellow substance itself seemed quite stable, suffering no apparent loss in color on standing for a week.A quantity of the yellow substance was treated with alcohol, and the resulting colorless crystals filtered off, washed with alcohol until free from chloride, and recrystallized from alcohol; in. p. 225-227°with darkening. This was assumed to be the same substance as the dehydrated N-(3,4-dihydroxyphenacyl) N-(d-hydroxyethyl)benzamide, with the melting point raised by better puri-fication. The analysis indicated the loss of one molecule of water during the treatment with alcoholic hydrogen chloride.The colorless product gave an emerald green color with ferric chloride solution. It was insoluble in 5% sodium carbonate solution.
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