Fremgangsmåde til minimering af racemiseringen ved fremstilling af optisk aktive [(aryloxy)-phenoxy]propionatherbicider

One of the routes to prepare optically active 2-(4-aryloxphenoxy)propionic acid ester herbicide is to couple optically active 2-(4-hydrophenoxy)propionic acid esters with halogenated aromatic or heteroaromatic compound. Conversion of the optically active 2-(4-hydroxyphenoxy)propionic acid ester into...

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Bibliographic Details
Main Authors KERSHNER, LARRY D, TAI, JIMMY J
Format Patent
LanguageDanish
Published 20.09.2004
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
AGRICULTURE
ANIMAL HUSBANDRY
APPARATUS THEREFOR
BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
CHEMISTRY
FISHING
FORESTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HUNTING
METALLURGY
ORGANIC CHEMISTRY
PEST REPELLANTS OR ATTRACTANTS
PLANT GROWTH REGULATORS
PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF
TRAPPING
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Summary:One of the routes to prepare optically active 2-(4-aryloxphenoxy)propionic acid ester herbicide is to couple optically active 2-(4-hydrophenoxy)propionic acid esters with halogenated aromatic or heteroaromatic compound. Conversion of the optically active 2-(4-hydroxyphenoxy)propionic acid ester into the acid salt prior to the coupling step effectively prevents the racemization that unexpectedly occurs otherwise.
Bibliography:Application Number: DK19900000253