Process for the manufacture of 2-isopropyl-4-methyl-6-hydroxypyrimine
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United States of America Patent
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May 21, 1996
Grant Date -
N/A
app pub date -
Jun 1, 1995
filing date -
Aug 11, 1994
priority date (Note) -
Expired
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Abstract
Hydroxypyrimidine, a key intermediate in the manufacture of diazinon, is prepared in high yields and high purity by reacting an amidine with methyl-acetoacetate in a dry, i.e. non-aqueous, medium in the presence of a methanolic base in an aliphatic hydrocarbon solvent while azeotropically distilling off water formed during the reaction.
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