1378943-63-5Relevant articles and documents
Rosuvastatin intermediate, preparation method of intermediate and preparation method of rosuvastatin ester
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, (2022/04/06)
The invention relates to a rosuvastatin intermediate, a preparation method of the intermediate and a preparation method of rosuvastatin ester, and provides a novel rosuvastatin intermediate compound, namely, N-(5-(((1-benzyl-1H-benzo [d] imidazole-2-yl)-sulfone)-methyl)-4-(4-fluorophenyl)-6-isopropylpyrimidine-2-yl)-N-methylmethanesulfonamide. The rosuvastatin intermediate can be used for synthesizing rosuvastatin ester, under the influence of the self structure of the rosuvastatin intermediate, when the rosuvastatin ester is synthesized, a substitution reaction can be carried out firstly, and then an oxidation reaction is carried out, and the generation of impurities in the reaction process is reduced, so that the reaction can be carried out through a 'one-step method', the synthesis process steps are greatly simplified, and the industrial production of the rosuvastatin ester is favorably realized.
Preparation method of rosuvastatin calcium
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Paragraph 0028-0031, (2020/06/17)
The invention belongs to the technical field of medicinal chemistry, and particularly relates to a preparation method of rosuvastatin calcium. The preparation method comprises steps: in an inert atmosphere protection environment, a specific compound is used as a raw material and is reacted under the action of a dilute acid reagent to obtain a hydroxyl protecting group-removed compound; esterolysisis carried out under the action of an alkaline reagent to obtain rosuvastatin sodium; and concentrating is carried out, a proper amount of water is added, the pH value is adjusted to 3-4 by using anacid, extracting is carried out, an obtained organic layer is cooled and crystallized to obtain a rosuvastatin white solid, the white solid is dissolved in pure water, the pH value is adjusted to 8-9by using an alkali, and reacting with a calcium salt aqueous solution is carried out to obtain rosuvastatin calcium with the purity of 99.5% or above and the impurity content of less than 0.1%.
Recycling method of 1-phenyl-5-hydroxytetrazole
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Paragraph 0077; 0081, (2020/01/12)
The invention discloses a recycling method of 1-phenyl-5-hydroxytetrazole, and belongs to the technical field of medicinal chemistry. The preparation method comprises the following steps: a byproduct1-phenyl-5-hydroxytetrazole generated in preparation process of a rosuvastatin calcium intermediate is converted into 1-phenyl-5-mercaptotetrazole; and meanwhile, the 1-phenyl-5-mercaptotetrazole is further used for preparing a rosuvastatin calcium intermediate or rosuvastatin calcium. According to the method disclosed by the invention, reasonable recycling of the byproduct 1-phenyl-5-hydroxytetrazole is realized, the raw materials are fully utilized, the production cost of rosuvastatin calcium and the intermediate thereof is reduced, and the emission of three wastes is reduced.