FREMGANGSMAATE FOR FREMSTILLING AV 0-(3-FENYL-6-KLOR-PYRIDAZINYL-(4)-S-(ALKYL)-TIOKARBONATER

In a new process for the prodn. of 3-phenyl-6-chloro-4 pyridazinyl thiocarbonates (I) by reacting salts of 3-phenyl-4-hydroxy-6-chloropyridazine (II) with alkyl thiochloroformates ClCOSR (III), alkali salts of (II) are used and the reaction is carried out in aq.-acetonic soln. at 5-60 deg.C then the...

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Bibliographic Details
Main Authors KLOIMSTEIN, ENGELBERT, RANINGER, FRANZ
Format Patent
LanguageNorwegian
Published 20.08.1990
Edition5
Subjects
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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Summary:In a new process for the prodn. of 3-phenyl-6-chloro-4 pyridazinyl thiocarbonates (I) by reacting salts of 3-phenyl-4-hydroxy-6-chloropyridazine (II) with alkyl thiochloroformates ClCOSR (III), alkali salts of (II) are used and the reaction is carried out in aq.-acetonic soln. at 5-60 deg.C then the denser aq. alkali chloride phase is sepd. off and the pure product is obtd. by evaporation of acetone from the organic phase (where R is opt. branched 1-18C alkyl). The products are known herbicides (cf. DE2331398). The process avoids the need for drying of starting materials and gives practically quantitative yields.
Bibliography:Application Number: NO19830001595