Patent
Preparation of 11benzazonine derivative
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TLDR
In this paper, the solubility difference of the diastereomeric mixture formed by treatment of a derivative of dl-benzazonine with an optically active organic acid in a solvent was used to obtain the title compound.Abstract:
PURPOSE:To obtain the title compound, a lenitive having no side effect, low toxicity and a high biological activity, by making use of the solubility difference of the diastereomeric mixture formed by treatment of a derivative of dl-benzazonine with an optically active organic acid in a solvent. CONSTITUTION:A derivative of dl-benzazonine of the formula (R=H, methyl) is treated with an optically active organic acid (example; optically active mandelic acid, optically active tartaric acid, etc.) in a solvent to form diastereomeric mixture, form which a derivative of l-benzazonine is isolated by making use of the solubility difference of the isomers to a solvent, e.g. acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.read more
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