Improvement for the synthesis process of cymoxanil
In view of the problems of low yield,large amounts of wastes and low safety,an improved synthesis process was developed.The target product cymoxanil was obtained by two steps,1-cyanoacetyl-3-ethyl urea reacted with isopropyl nitrite via oximation reaction,and then reacted with methyl chloride via methylation reaction in the presence of catalyst.The yield of the product was over 95％and the purity of the product was 99％under the optimized process conditions.
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