Preparation of optically active aliphatic carboxylic acids

Details Preparation of optically active aliphatic carboxylic acids Preparation of optically active aliphatic carboxylic acids

C - Chemistry, Metallurgy

07

C

C07C 51/42 (2006.01) C07C 51/487 (2006.01) C07C 57/30 (2006.01) C07C 57/58 (2006.01) C07C 67/48 (2006.01) C07C 67/60 (2006.01)

Patent

CA 2043649

A process for the separation of a racemic mixture of certain aliphatic carboxylic acids or esters thereof is disclosed. The process comprises i) forming a salt solution comprising said racemic mixture of a C1 to C6 linear or branched aliphatic carboxylic acid and an organic or inorganic base, ii) treating .said salt solution with a chiral organic nitrogenous base having a base strength no stronger than said organic or inorganic base, iii) precipitating from the reaction solution formed in step ii) the less soluble diastereomeric salt, and iv) separating said precipitated diastereomeric salt.

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