Process for the preparation of 2-ethoxy-4,6-dihydroxypyrimidine
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United States of America Patent
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Sep 3, 1996
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N/A
app pub date -
Jul 28, 1994
filing date -
Jul 28, 1994
priority date (Note) -
Expired
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Abstract
A salt of 2-ethoxy-4,6-dihydroxypyrimidine (DHEP) is prepared by contacting a salt of O-ethylisourea with dimethyl malonate in the presence of a methoxide base to form the salt of DHEP. The salt of DHEP can optionally be protonated with an acid to form neutral DHEP. The reaction is typically conducted in a methanol solvent at a temperature less than about 30.degree. C. Typically, the monosodium salt of DHEP is prepared by contacting O-ethylisourea hydrochloride with dimethyl malonate in the presence of sodium methoxide and methanol solvent.
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