42487-72-9Relevant articles and documents
Synthetic method of hydroxypyrimidine compound
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Paragraph 0075-0077, (2020/12/08)
The invention discloses a synthesis method of a hydroxypyrimidine compound, which comprises the following steps: adding alkyl guanidine salt into a methanol or ethanol solvent, adding a neutralizing reagent to carry out a neutralization reaction, filtering, and removing the solvent from the filtrate to obtain the residue alkyl guanidine; mixing alkyl guanidine with alkyl alpha-alkylacetoacetate, reacting in an inert atmosphere at 90-140 DEG C until water and methanol are separated, cooling to 60-80 DEG C after the reaction is finished, adding alkyl hydrocarbon into the reaction solution, stirring for 10-30 minutes, cooling to room temperature, filtering and washing to obtain the hydroxypyrimidine compound. According to the synthesis method, no solvent reaction exists, so that the single-kettle reaction efficiency is greatly improved; in addition, dehydration and degreasing are carried out in an inert atmosphere, so that deterioration of alkyl alpha-alkylacetoacetate at high temperatureis effectively avoided, and the reaction safety is also improved. Therefore, the synthesis method disclosed by the invention has the advantages of high single-kettle reaction efficiency, high safetyand less three wastes.
Acid dye for polyamide fiber dyeing and preparation method thereof (by machine translation)
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Paragraph 0040; 0043-0044, (2020/03/25)
The invention discloses an acid dye, for polyamide fiber dyeing, which has a chemical structural general formula of: R Is an aromatic sulfonic acid group . and the invention also provides a preparation method. of the acid dye, and the acid dye, prepared by the invention does not contain a heavy metal, as a novel acid dye and has excellent water treatment fastness, and bright color light. (by machine translation)
Pyrimidines. 8. Chlorination of 6-methyluracil with phosphorus oxychloride in the presence of trialkyamines
Gershon,Grefig,Clarke
, p. 205 - 209 (2007/10/02)
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