90503-06-3Relevant articles and documents
Macrocyclic lactone impurity synthetic method
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Paragraph 0006; 0026; 0027; 0028; 0029; 0030; 0031, (2017/04/28)
The invention relates to a method for preparing an azithromycin impurity I and an azithromycin impurity E. The method comprises the following steps: mixing azithromycin with a solvent, and adding the mixture into a compound which is shown as (I) in the description to perform a demethylation reaction, wherein R1 and R2 are respectively and independently methyl, ethyl, propyl, naphthenic group, a phenyl and p-methylphenyl. According to the method for preparing azithromycin impurity, the reaction is carried out under a mild condition; the method can be used for preparing the azithromycin impurity I and the azithromycin impurity E by controlling the amount of a reagent; the HPLC purity of the azithromycin impurities prepared by the method is 98 percent or more.
9A-AZALIDES WITH ANTI-INFLAMMATORY ACTIVITY
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Page 26-28, (2008/06/13)
Macrolides with anti-inflammatory activity are described, and more particularly, 9a-azalides without cladinose in position 3 with anti-inflammatory activity, their pharmaceutically acceptable salts and pharmaceutical compositions that contain them as active principle.