134523-01-6Relevant articles and documents
PROCESS FOR THE CONTINUOUS MANUFACTURE OF STATINS
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, (2021/06/04)
The present invention relates to process for the continuous manufacture of Statins or salts thereof. The present invention relates to process for the continuous manufacture of Atorvastatin or a salt thereof. The present invention relates to a continuous m
AN IMPROVED AND COMMERCIALLY VIABLE PROCESS FOR PREPARATION OF PYRROLE DERIVATIVES WITH IMPROVED IMPURITY PROFILE & MINIMISATION OF UNIT OPERATIONS.
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, (2020/02/14)
The present invention relates to improved process for the preparation of a pyrrole derivative as a racemic mixture, an enantiomer, a diastereoisomer, a mixture thereof, a tautomer thereof or a pharmaceutically acceptable salt and hydrates thereof and also intermediates involved therein. Particularly invention is directed to improved processes for the preparation of pyrrole derivatives such as (4R,cis)-6-[2-[3-phenyl-4-(phenyl-carbamoyl)-2-(4-fluorophenyl)-5-(1-methyl-ethyl)-pyrrole-1-yl]-2,2-dimethyl-[1,3]dioxane-4-yl-acetic acid-tertiary butyl ester of formula IV followed by its conversion into [R-(R*, R*]-2-(4-fluorophenyl)- β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1- heptanoic acid particularly calcium salt and its hydrate represented by Formulae I/IA respectively wherein formation of the impurities is either eliminated or minimized in the corresponding intermediaries.
Preparing method of high-purity atorvastatin calcium
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, (2018/10/19)
The invention discloses a preparing method of high-purity atorvastatin calcium, and belongs to the technical field of organic synthesis. The method includes the steps of making a compound V and calcium acetate react in a water and alcohol mixed solvent system, and conducting cooling crystallization and filtration after the reaction is completed to obtain an atorvastatin calcium crude product, wherein the reaction temperature is 40-70 DEG C, the volume ratio of alcohols to water in the reaction system is 1:(2-8), and the mass percentage concentration of the compound V in a mixed solvent is 5-10%; dissolving the atorvastatin calcium crude product in a recrystallization solvent A, adding I-type atorvastatin calcium crystals at 45-85 DEG C for crystal transformation, and conducting cooling crystallization, filtration, washing and drying after crystal transformation is completed to obtain a fine product, wherein the mass percentage concentration of the atorvastatin calcium crude product inthe recrystallization solvent A is 5-10%. The method has the advantages of being high in product purity, easy and safe to operate, high in yield and the like and is suitable for large-scale industrialproduction.