Separation of isomers
AssigneeShell Oil Company
InventorsRonald F. Mason, Derek A. Wood
Life of this patent
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Abstract
Mixtures of the geometric isomeric forms of 3-azabicyclo-(3.1.0)hexane-2-carbonitrile are resolved by selective extraction of a mixture of their benzenesulfonic acid salts or their toluenesulfonic acid salts.
Claims4
A method for separating the cis- and trans- isomeric forms of 3-azabicyclo(3.1.0)hexane-2-carbonitrile from mixtures thereof which comprises extracting a mixture of the benzenesulfonic acid or toluenesulfonic acid salts of the isomers with a solvent selected from one or more of water, methanol and ethanol, recovering separately the salts in the extract and the extracted solid phase.
A salt selected from the benzenesulfonic acid and toluenesulfonic acid salts of 3-azabicyclo(3.1.0)hexane-2-carbonitrile.
Dependencies are inferred from the claim text.