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Benzathine salt of ceftiofur, preparation method and application thereof

A ceftiofur and benzyl technology is applied to the application field in the preparation of ceftiofur sodium salt, which can solve the problem of insoluble ceftiofur sodium, purity and solubility of ceftiofur sodium not meeting medicinal requirements, and salt formation of ceftiofur sodium. Incomplete and other problems, to avoid degradation, easy purification, high purity

Active Publication Date: 2008-08-20
QILU ANIMAL HEALTH PROD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, the method has the disadvantages that the salt of formula VI is difficult to dissolve in the solvent, and the salt formation of ceftiofur sodium is not complete, and the purity and solubility of the product ceftiofur sodium cannot meet the pharmaceutical requirements.

Method used

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  • Benzathine salt of ceftiofur, preparation method and application thereof
  • Benzathine salt of ceftiofur, preparation method and application thereof
  • Benzathine salt of ceftiofur, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: Preparation of ceftiofur bisbenzylethylenediamine salt

[0043] Cool 200ml of dichloromethane to 0-5°C, add 30.0g of 7-amino-3-[(2-furancarbonyl)thiomethyl]-3-cephem-4-carboxylic acid, 10ml of anhydrous methanol, 20ml of three Ethylamine, then put in 33.0g 2-(2-aminothiazol-4-yl)-(Z)-(methoxyimino)acetic acid benzothiazole thioester (AE active ester), react at 0~5℃ for 8 Hour. Add 100ml of water to the above reaction solution, stir well, let stand, and separate the water phase; then add 100ml of water, stir well, let stand, separate the water phase. The aqueous phases were combined and extracted with 200 ml of dichloromethane. Adjust the pH of the aqueous phase to 6.0-8.0 with dilute hydrochloric acid, add 1 g of activated carbon for decolorization and filtration, wash the activated carbon with 100 ml of water, combine the aqueous phases, add 100 ml of dichloromethane, and stir. Another 20.0 g of bisbenzylethylenediamine diacetate was dissolved in 200 m...

Embodiment 2

[0046] Embodiment 2: Preparation of ceftiofur bisbenzylethylenediamine salt

[0047] The operation is the same as in Example 1, wherein 500 ml of acetone is added to the combined aqueous phase to replace 100 ml of dichloromethane, and 1000 ml of water is added to obtain 47 g of ceftiofur. same.

Embodiment 3

[0048] Embodiment 3: Preparation of ceftiofur bisbenzylethylenediamine salt

[0049] Suspend 60g of ceftiofur hydrochloride in 400ml of water, add dilute ammonia water to adjust the pH to 6.0-8.0, after the solution is clarified, add 2g of activated carbon, stir for 30 minutes, filter, add 200ml of dichloromethane to the filtrate, and stir. Another 28 g of bisbenzylethylenediamine diacetate was dissolved in 300 ml of water. Add the bisbenzylethylenediamine diacetate solution to the above solution to precipitate the bisbenzylethylenediamine salt of ceftiofur, stir evenly, filter, wash with water, and dry in vacuo to obtain 62g of ceftiofur bisbenzylethylenediamine. Amine salt, structure is identical with embodiment 1.

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PUM

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Abstract

The invention relates to the double benzyl (or the substituted benzyl) ethylenediamine salt of Ceftiofur, the preparation method and the application in the preparation of ceftiofur sodium salt. The double benzyl (or the substituted benzyl) ethylenediamine salt of Ceftiofur is adopted for the preparation of ceftiofur sodium by the treatment of cation resin, the preparation process and the processing are simple, the purity of products is high and the technique is stable, thus being suitable for the industrial production.

Description

technical field [0001] The invention relates to a bisbenzyl (or substituted benzyl) ethylenediamine salt of ceftiofur, its preparation method and its application in the preparation of ceftiofur sodium salt. Background technique [0002] Ceftiofur (formula I), chemical name: (6R, 7R)-7-[2-(2-aminothiazol-4-yl)-(Z)-(methoxyimino)acetamido] -3-[(2-furylcarbonyl)thiomethyl]-3-cephem-4-carboxylic acid is a cephalosporin veterinary drug developed by Pharmacia & Upjohn in the United States, mainly used for the treatment of bacterial respiratory tract infections in livestock Wait. [0003] [0004] Ceftiofur sodium (formula II), the sodium salt form of ceftiofur, has good solubility in water, is easy to prepare injection preparations, and has been widely used. [0005] [0006] A variety of preparation methods of ceftiofur sodium are disclosed in the literature, for example, US4937330 discloses that ceftiofur hydrochloride (formula III) is neutralized by basic resin to form ...

Claims

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Application Information

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IPC IPC(8): C07D501/36
Inventor 孔梅吴连勇禚宝山范传文
Owner QILU ANIMAL HEALTH PROD
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