56-06-4Relevant articles and documents
Method for preparing folic acid by virtue of micro-channel reaction (by machine translation)
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Paragraph 0053-0056, (2020/12/14)
The invention belongs to the technical field of chemical synthesis of drugs, and relates to a synthesis method for preparing folic acid through a microchannel reactor. An intermediate 6 is prepared from cyanoethyl acetate as a raw material by one-step continuous operation, and the folic acid bulk drug is prepared through one-step reaction of the intermediate 6 and L - glutamate. The synthesis method uses the microchannel reactor to prepare the folic acid intermediate 2,triamino -4 - hydroxypyrimidine and folic acid, is safe and environment-friendly, and ensures the tasteless system. The method guarantees that the operation is simple and feasible, the solvent consumption is greatly reduced, 2,triamino -4 - hydroxyl pyrimidine yield and purity are obviously improved. (by machine translation)
Design, synthesis and biological evaluation of pyrimidine-based derivatives as antitumor agents
AlHazmi, Hassan A.,Albratty, Mohammed M.,El-Sharkawy, Karam A.
, p. 227 - 238 (2020/10/06)
In this paper we made a contentious effort to afford heterocyclic compounds with interesting biological activities. The reaction of guanidine with either activated methylene groups, arylhydrazono derivatives, dicyanopropene derivatives, malononitrile dimer or arylhydarazononitrile derivatives afforded diaminopyrimidine derivatives, aryldiazenyl pyrimidine derivatives, fused pyridopyrimidne derivatives and pyrimidopyridazine derivatives respectively. Also the reaction of guanidine with phenylhydrazono carbonyl compounds produced phenyldiazenyl pyrimidine derivatives. The latter products were directed toward the reaction with either acetic anhydride or ethylcyanoacetate to form acetamidopyrimidine derivatives and cyanoacetamidopyrimidine derivatives respectively. The latter products underwent cyclization via reaction with either activated methylene groups or activated methylene carbonyl compounds afforded pyridopyrimidne derivatives. The structures of the newly synthesized compounds were established using IR, 1H NMR, 13C NMR and mass spectrometry and their antitumor activity was investigated. Some of these compounds showed promising inhibitory effects on the three different cell lines.
Method for synthesizing 2,4-diamino-6-chloropyrimidine
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Paragraph 0032; 0033; 0034; 0035, (2018/04/21)
The invention discloses a method for synthesizing 2,4-diamino-6-chloropyrimidine. According to the method, methyl cyanoacetate, guanidine nitrate and sodium methoxide serve as raw materials to react with one another to obtain 2,4-diamino-6-hydroxypyrimidine, and then 2,4-diamino-6-hydroxypyrimidine is chloridized with POCl3 in the presence of triethylamine to obtain 2,4-diamino-6-chloropyrimidine.Compared with the prior art, the situation that the whole reactant is neutralized to generate and precipitate a large amount of phosphate is avoided, the product purity is improved, the product yieldis increased, the situation that a solvent is used for refining DACP is avoided, the process is greatly simplified, the cost is reduced, the yield is increased, and the method has the advantages of being high in yield, easy to operate and high in safety and is a very effective process suitable for industrialized mass production.