PROCESS OF CONVERSION OF PYRIDINE 2,3-DICARBOXYLIC ACID ESTERS TO CYCLIC ANHYDRIDES

In one embodiment this invention provides a process for converting a pyridine-2,3-dicarboxylic acid diester to the corresponding cyclic anhydride directly, without any recovery and purification of the pyridine2,3-dicarboxylic acid intermediate. An important aspect of the invention process is the uti...

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Bibliographische Detailangaben
Hauptverfasser:	GUPTON, FRANKLIN B, SAUKAITIS, JOHN C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMISTRY FISHING FORESTRY 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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Beschreibung
Zusammenfassung:	In one embodiment this invention provides a process for converting a pyridine-2,3-dicarboxylic acid diester to the corresponding cyclic anhydride directly, without any recovery and purification of the pyridine2,3-dicarboxylic acid intermediate. An important aspect of the invention process is the utility of pure pyridine2,3-dicarboxylic acid diester starting matter. A procedure for providing pure diester starting material is demonstrated.