PREPARATION OF HIGHER ALKYL ESTERS OF CARBOXYLIC ACIDS

Larger (C6-C12) esters of substituted 2-pyridinyloxyalkanoic acids, such as 1-methylheptyl (4-amino-3,5-dichloro-6-fluoro-2-pyridinyloxy)acetate, are prepared in high yield and purity by first preparing the methyl or ethyl ester and then transesterifying with a C6-C12 alcohol. The methyl or ethyl es...

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Bibliographic Details
Main Authors SIMON C. LEE, IAN R. KING, KARL L. KRUMEL
Format Patent
LanguageEnglish
Published 11.09.1991
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
AGRICULTURE
ANIMAL HUSBANDRY
APPARATUS THEREFOR
BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
FISHING
FORESTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HUNTING
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PEST REPELLANTS OR ATTRACTANTS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PLANT GROWTH REGULATORS
PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF
THEIR RELEVANT APPARATUS
TRANSPORTING
TRAPPING
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Summary:Larger (C6-C12) esters of substituted 2-pyridinyloxyalkanoic acids, such as 1-methylheptyl (4-amino-3,5-dichloro-6-fluoro-2-pyridinyloxy)acetate, are prepared in high yield and purity by first preparing the methyl or ethyl ester and then transesterifying with a C6-C12 alcohol. The methyl or ethyl ester can be prepared by alkylation of an alkali metal salt of 4-amino-3,5-dichloro-6-fluoro-2-pyridinol with methyl or ethyl chloroacetate and the transesterification can be carried out in the presence of a tetraalkyl titanate catalyst.
Bibliography:Application Number: CN19911000972