17687-24-0Relevant articles and documents
NITROGEN HETEROCYCLIC COMPOUNDS AND METHODS OF USE
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Paragraph 1808, (2021/06/26)
The present disclosure relates to compounds of formula (I): and pharmaceutically acceptable salts and stereoisomers thereof. The present disclosure also relates to methods of preparing the compounds, compositions comprising the compounds, and methods of using the compounds as inhibitors of receptor tyrosine kinases, in particular oncogenic mutants of ErbB-receptors e.g. in the treatment of cancer.
Method for synthesizing 2-chloro-5-amino-6-pyrimidine ethyl formate
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Paragraph 0019-0021; 0025-0027; 0031-0033; 0037-0039, (2019/11/28)
The invention discloses a method for synthesizing 2-chloro-5-amino-6-pyrimidine ethyl formate. The method comprises the following steps: firstly, enabling fuming nitric acid, concentrated sulfuric acid and orotic acid to react so as to obtain nitroorotic acid; further mixing the obtained nitroorotic acid with ethanol, and adding dropwise the concentrated sulfuric acid at room temperature so as toobtain nitroorotic acid ethyl ester; enabling the nitroorotic acid ethyl ester to react with phosphorus oxychloride and an organic alkali so as to obtain 2,4-dichloro-5-nitro-6-pyrimidine ethyl formate; and finally mixing the 2,4-dichloro-5-nitro-6-pyrimidine ethyl formate with palladium carbon and magnesium oxide, putting the mixture into tetrahydrofuran, and performing a reaction, so as to obtain a final product. By adopting the method, the orotic acid in the market is adopted as a raw material, and the 2-chloro-5-amino-6-pyrimidine ethyl formate is prepared through reactions of nitration, esterification, chlorination and reduction. The method is convenient in process operation, simple in operation, gentle in reaction and small in pollution, in addition, the prepared pyrimidine is high in yield and purity and small in environment pollution, and the prepared 2-chloro-5-amino-6-pyrimidine ethyl formate prepared by using the method can be applied to large-scale production.
Production method of dipyridamole bulk drug
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Paragraph 0005; 0017, (2018/06/04)
The invention provides a production method of a bulk drug of dipyridamole, which relates to the field of the synthesis of chemical bulk drugs. The production method comprises the following steps: protecting carbonyl of urea, performing condensation reaction with 2,3-diaminosuccinic acid, performing chlorination for hydroxyl of a condensation reactant, replacing chlorine with piperidine, hydrolyzing an obtained product, obtaining a compound containing two carbonyls, separating the product, enabling the separated product to have condensation reaction with diethanol amine, obtaining dipyridamole,and refining to obtain a finished product. By adopting the production method, the synthetic procedure of the dipyridamole is simplified, the conversion rate of raw materials can be greatly increased,and the production cost is decreased.