Preparation of optically active aliphatic carboxylic acids

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

1990-06-18

1991-05-14

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

548572, 549 79, 549499, 560 55, 560 56, 560100, 560102, 560105, 560265, 558354, 562466, 562469, 562490, 562496, 562606, C07B 5700

Patent

active

050157647

ABSTRACT:
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 C.sub.1 to C.sub.6 linear or branched aliphatic carboxylic acid and an organic or inorganic base (ii) treating said salt solution with one-half molar equivalent of 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.

REFERENCES:
patent: 4786731 (1988-11-01), Russell
patent: 4865770 (1989-09-01), Piscelli

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