| http://www.w3.org/ns/prov#value | - The novel pyrimidines (V) can be prepared according to the following manner from the previously described ??-keto esters: ##STR15## The condensation of the appropriate ??-keto ester IIii with guanidine (III) can be carried out in polar solvents such as ethanol, isopropanol, 1-butanol, dimethylformamide (DMF), and the like, with ethanol preferred, in the presence of a base such as a carbonate (for
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