Preparation of optically-active (mixed) anhydrides and acids

Details Preparation of optically-active (mixed) anhydrides and acids Preparation of optically-active (mixed) anhydrides and acids

1984-03-26

1986-02-11

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562426, 562429, 562431, 562464, 562527, 260548, 568301, C07C 53134, C07C 5730

Patent

active

045700176

ABSTRACT:
A process for the preparation of an optically-active (mixed) anhydride of an alpha-chiral (optically-active) carboxylic acid by treating a non-symmetrical ketene with a carboxylic acid in the presence of an optically-active (chiral) tertiary amine catalyst. Hydrolysis of the resulting (mixed) anhydride yields the optically-active acid corresponding to the non-symmetrical ketene.

REFERENCES:
CA, 58:12479f (1963).
Organic Reactions, pp. 124-127; R. Adams, editor; John Wiley & Sons, Inc., N.Y., N.Y. (1946).

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