Abstract
AbstractBy heating l‐ecgonine in weakly acidified aqueous solution and also in strong hydrochloric acid solution, l‐ecgonine is converted to the extent of 10.5‐12.5% into d‐φ‐ecgonine, an equilibrium mixture of ecgonines being formed.Both l‐ and d‐φ‐ecgonine give black crystals like l‐ecgonidine with hydriodic acid solution containing iodine; these crystals, when boiled with water, give solutions which show respectively leavo‐ and dextro‐gyratory rotations.On boiling l‐ecgonine as an alkali‐salt in saturated alkali chloride solution, another equilibrium is reached between the ecgonines; the sodium salt gave a 86.9% conversion into d‐φ‐ecgonine, the potassium salt one of 69% and the calcium salt one of 78.5%.
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