Method for preparing phosphate eritrocina using eritrocina

A technology of erythromycin phosphate and erythromycin, which is applied to the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., can solve the problems of easy crystal precipitation, difficult operation, high cost, etc., and achieve short process route and easy operation Simple, low-cost effect

Active Publication Date: 2006-07-26
XIAN LIJUN PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this process, crystals are easily precipitated durin

Method used

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  • Method for preparing phosphate eritrocina using eritrocina
  • Method for preparing phosphate eritrocina using eritrocina

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 20g of erythromycin was added to 500ml of n-butyl acetate organic solvent, stirred, and 3.2ml of 60% phosphoric acid-n-butyl acetate solution was added dropwise to adjust the pH value to the reaction end point pH 4.5, and the reaction temperature was controlled at 10° C. Centrifuge and oven dry to obtain a white powder of erythromycin phosphate.

Embodiment 2

[0052] 12g of erythromycin was added to 250ml of isobutyl acetate organic solvent, stirred, and 10ml of 15% phosphoric acid-isobutyl acetate solution was added dropwise to adjust the pH value to the reaction endpoint pH 4.0, the reaction temperature was controlled at 12°C, and finally washed with water The reactant was separated and dried to obtain a white powder of erythromycin phosphate.

Embodiment 3

[0054] 80g of erythromycin was added to 80ml of ethanol organic solvent, stirred, and 16ml of 45% phosphoric acid-ethanol solution was added dropwise to adjust the pH value to pH 8.0 at the end of the reaction, and the reaction temperature was controlled to 15°C, and finally, the erythromycin phosphate was obtained by spray drying. Vegetarian white powder.

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Abstract

The invention relates to a Method for preparation of erythrocin salt, especially a method on using erythrocin to prepare phosphoric acid erythrocin. The characters are: dissolving erythrocin in organic solventn or water of c2-c6 containing hydroxyl group and carbonyl group, agitating, controlling the reaction temperature of forming salt, carrying through synthesize reaction by dripping phosphoric acid solution to regulate the solution's pH value and control reflecting terminal, finally, getting phosphoric acid erythrocin finished product after separation and desiccation. Its technology is advanced, the hazardness for people and circumstance is small, the productivity is high, the cost is low.

Description

technical field [0001] The invention relates to a preparation method of erythromycin salt, in particular to a method for preparing erythromycin phosphate with erythromycin. Background technique [0002] Erythromycin phosphate, the phosphate of erythromycin, is a new type of veterinary drug that has been used in recent years. It has the same effect as erythromycin thiocyanate, odorless erythromycin, erythromycin erythromycin, and erythromycin acetate, and its efficacy is equivalent to that of erythromycin. It is mainly used for the treatment of inflammation in animals. Erythromycin and its derivatives are broad-spectrum macrolide antibiotics that are widely used in clinic. They have a strong antibacterial effect on Gram-positive bacteria and are used for infections caused by sensitive Gram-positive cocci. The antibacterial mechanism is to block transpeptidation and mRNA displacement by binding to the 50S subunit of the sensitive bacterial ribosomal protein. It inhibits the ...

Claims

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Application Information

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IPC IPC(8): C07H17/08C07H1/02
Inventor 陈晓军齐拴武郑飞张玉良孙建敏王国维文美乐胡麦霞王健邓弘关惠娟吴湘明
Owner XIAN LIJUN PHARMA CO LTD
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