Stereoconvergent process for preparing optically active carboxyl

Details Stereoconvergent process for preparing optically active carboxyl Stereoconvergent process for preparing optically active carboxyl

1987-12-23

1990-05-01

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

562496, C07C 5109

Patent

active

049220098

ABSTRACT:
A stereoconvergent process is described for preparing optically active alpha-arylalkanoic acids using as starting substance a diastereoisomeric mixture of ketals of formula ##STR1## in which the substituents have the meanings given in the description. The described process leads to the formation of a single enantiomer.

REFERENCES:
patent: 4535166 (1985-08-01), Castaldi
patent: 4542237 (1985-09-01), Schloemer
patent: 4605758 (1986-08-01), Schloemer
patent: 4620031 (1986-10-01), Uggeri
patent: 4654438 (1987-03-01), Schloemer
patent: 4670586 (1987-06-01), Yabe
patent: 4762948 (1988-08-01), Ito

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