- PREPARATION PROCESS OF ERYTHROMYCIN THIOCYANATE
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Disclosed is a preparation process of erythromycin thiocyanate, which belongs to the pharmaceutical field. The preparation process provided by the invention uses erythromycin or its salt(s) as raw material(s), dissolves it/them in acetone or the mixed solvent containing acetone and obtains erythromycin thiocyanate rich in erythromycin thiocyanate A as the main component and low in the content of impurities. Said erythromycin thiocyanate could be used as the raw material for preparing Azithromycin and Clarithromycin, which meets to the standards made by European Union and US.
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Paragraph 0042
(2014/08/19)
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- PREPARATION PROCESS OF ERYTHROMYCIN THIOCYANATE
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Disclosed is a preparation process of erythromycin thiocyanate, which belongs to the pharmaceutical field. The preparation process provided by the invention uses erythromycin or its salt(s) as raw material(s), dissolves it/them in acetone or the mixed solvent containing acetone and obtains erythromycin thiocyanate rich in erythromycin thiocyanate A as the main component and low in the content of impurities. Said erythromycin thiocyanate could be used as the raw material for preparing Azithromycin and Clarithromycin, which meets to the standards made by European Union and US.
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Page/Page column 5; 6
(2014/07/09)
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- HYDRATES OF ERYTHROMYCIN SALTS, THE PREPARATION AND THE USE THEREOF
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The present invention relates to a macrolide derivative as well as preparation and use thereof. The macrolide derivative of the present invention, i.e., a hydrate of erythromycin salts, has a molecular formula of C37H67NO13·A·nH2O, n=1.0-11.0, in which A is an organic acid or an organic acids, selected from lactobionic acid, thiocyanic acid, maleic acid, fumaric acid, thiocyanic acid, acetic acid, methanesulfonic acid, benzenesulfonic acid, nicotinic acid, lactic acid, citric acid, tartaric acid, aspartic acid, glutamic acid and phosphoric acid, the hydrate has good water solubility and better storage stability, which is suitable for the manufacture of a medicament for the treatment and prophylaxis of infectious diseases in human or animal caused by Gram-positive or negative bacteria.
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Page/Page column 10
(2011/04/24)
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