Trioxy bicyclic compounds useful for preparing optically active

Details Trioxy bicyclic compounds useful for preparing optically active Trioxy bicyclic compounds useful for preparing optically active

1990-03-15

1992-01-28

Shippen, Michael L.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544377, 546207, 548526, 549274, C07D48700

Patent

active

050845691

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 substitutents 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), Yube

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