Process for producing alpha-monochloroacetoacetic acid monomethylamide
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United States of America Patent
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Nov 25, 1980
Issued Date -
N/A
app pub date -
Nov 22, 1978
filing date -
Jun 30, 1977
priority date (Note) -
Expired
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Abstract
A process for the production of .alpha.-monochloroacetoacetic acid monomethylamide is disclosed which comprises chlorinating acetoacetic acid monomethylamide in the presence of urea and a water-soluble alkali metal salt or ammonium salt at a temperature of between -20.degree. and +10.degree. C. with 80-95% of the equivalent amount of chlorine; neutralizing the reaction mixture; separating the precipitated .alpha.-monochloroacetoacetic acid monomethylamide; and partially recycling the mother liquor back into the chlorination process. .alpha.-Chloroacetoacetic acid monomethylamide is a valuable intermediate for producing insecticidal active compounds, for example dimethyl-1-methyl-2-(methylcarbamoyl)-vinyl phosphate.
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