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A kind of membrane separation preparation method of high-purity moxictine

A high-purity moxictine technology, which is applied in the field of membrane separation and preparation of high-purity moxictine, can solve the problems of high investment cost and production cost, complex process, high energy consumption, etc., and reduce production cost and investment cost , Improve product purity, low energy consumption

Active Publication Date: 2016-06-08
DALIAN JOIN KING FINE CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent No. 4916154A discloses a method for preparing moxictin, which involves solid-liquid separation of the fermented liquid produced by Streptomyces fermentation, extraction of the nimoctine solution obtained after leaching, silica gel column chromatography, gel layer Nemoctine obtained by analysis with a purity of more than 90% (HPLC), the purified nemoctine is obtained through up-protection, oxidation, deprotection and oximation reactions, which is obtained through silica gel column chromatography, but the The method is complex and requires silica gel chromatography, which is cumbersome to operate and control. The amount of solvent used in this chromatography is large, and the requirements for anhydrous of the upper column entering the silica gel column are high, and the reusability is low, resulting in a decrease in the yield of this chromatography. ,higher cost
The Chinese patent with the application number 200810126358.3 discloses a method of separation using a macroporous adsorption resin column instead of silica gel gel chromatography, but the method of resin adsorption separation still requires the use of a large amount of organic solvents, and at the same time, a large amount of organic solvents need to be reprocessed. Processing, complex procedures, high investment costs and production costs
In the above two methods, the purified feed liquid needs to remove the organic solvent in a vacuum, which leads to high energy consumption and low product yield

Method used

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  • A kind of membrane separation preparation method of high-purity moxictine

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Experimental program
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Effect test

Embodiment 1

[0028] The method steps for preparing high-purity moxectine in this embodiment are as follows:

[0029] (1) The fermentation broth produced by Streptomyces fermentation is separated by solid-liquid, and the pre-purified solution of nemoctine is obtained after leaching, with a purity of 15.6%, containing 80g of solids with a concentration of 1.5%, pumped into polyethersulfone hollow fiber microfiltration Membrane filtration, control pump pressure 0.1-0.7MP. The membrane filtrate is received to obtain a filtrate with a purity of 20%.

[0030] The above-mentioned filtrate is pumped into a 3000 molecular weight cut-off ultrafiltration membrane to filter, the pump pressure is controlled to be 0.5-0.9MP, and the filtrate is received to obtain a filtrate with a purity of 52.5%.

[0031] (2) After step (1), the ultrafiltration nimoxetine solution is pumped into a roll nanofiltration membrane with a molecular weight cut-off of 200 for concentration to obtain a nimoxetine concentrate.

[0032]...

Embodiment 2

[0038] The method steps for preparing high-purity moxectine in this embodiment are as follows:

[0039] (1) After solid-liquid separation of the fermentation broth produced by Streptomyces, the pre-purified nemoctine liquid with a purity of 18.2% and a solid content of 1.8% in 90g is pumped into the polyethersulfone hollow fiber microfiltration. Membrane filtration, control pump pressure 0.1-0.7MP. The membrane filtrate is received to obtain a filtrate with a purity of 20%.

[0040] The above-mentioned filtrate is pumped into a 2000 molecular weight cut-off ultrafiltration membrane filtration, the pump pressure is controlled to 0.7-1.2MP, and the filtrate is received to obtain a filtrate with a purity of 52%.

[0041] (2) After step (1), the ultrafiltration nimoxetine solution is pumped into a roll nanofiltration membrane with a molecular weight cut-off of 200 for concentration to obtain a nimoxetine concentrate.

[0042] (3) Add the nimoxetine concentrate obtained in step (2) to dic...

Embodiment 3

[0048] The method steps for preparing high-purity moxectine in this embodiment are as follows:

[0049] (1) The fermentation broth produced by the fermentation of Streptomyces is separated from the solid and liquid, and the pre-purified liquid of nemoctine obtained after leaching, with a purity of 13.2%, containing 100g of solids with a concentration of 1.4.8%, is pumped into the polyethersulfone control Filtration by fiber microfiltration membrane, control pump pressure 0.1-0.7MP. The membrane filtrate was received to obtain a filtrate with a purity of 18.6%.

[0050] The above-mentioned filtrate is pumped into a 1500 molecular weight cut-off ultrafiltration membrane filtration, the pump pressure is controlled to be 0.7-1.2MP, and the filtrate is received to obtain a filtrate with a purity of 51.4%.

[0051] (2) After step (1), the ultrafiltration nimoxetine solution is pumped into a roll nanofiltration membrane with a molecular weight cut-off of 200 for concentration to obtain a n...

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Abstract

The invention discloses a method for separating and preparing a high-purity Moxidectin membrane, and belongs to the technical field of pharmaceutical chemistry. The method comprises the following steps: performing membrane filtration on a pre-purified Nemadectin solution; after extraction with dichloromethane, removing solvents by using conventional concentration; successively performing a protection feeding reaction, an oxidation reaction, an oximation reaction and a protection removing reaction on concentrate to obtain a Moxidectin crude solution; filtering to remove impurities through a membrane separation technique; obtaining a high-purity Moxidectin concentrated solution through a membrane concentration technique. The method disclosed by the invention uses the membrane separation technique to replace column chromatography and a macroporous resin adsorption and separation method, the technique is stable, controllable, simple and practical, the industrialization is easy, the dosage of the solvents is reduced, and a high-temperature solvent removing process of a material solution is omitted, so that the degradation risk of products is reduced, the product purity, the product quality and the product yield are improved, at the same time, the energy resources are saved, and the production cost is reduced.

Description

Technical field [0001] The invention relates to the technical field of medicinal chemistry, in particular to a membrane separation preparation method of high-purity moxectine. Background technique [0002] Moxidectin (INN: Moxidectin) is a macrolide agricultural antibiotic. It is mainly used to treat parasitic diseases in animals such as cattle and sheep. It can be fermented by Streptomyces to produce Nimectin (INN: Nemadectin) , And then obtained by chemical reaction, the structural formulas of nemoctine and moxectine are as formula (1). [0003] [0004] US Patent US4916154A discloses a method for preparing moxictine, that is, the fermentation broth produced by the fermentation of Streptomyces is subjected to solid-liquid separation, and the nemoxictine solution obtained after leaching is extracted, silica gel column chromatography, and gel layer Nimoxetine with a purity of more than 90% (HPLC) was obtained by analysis. The purified Nimoktine was subjected to protection, oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D493/22
CPCC07D493/22
Inventor 李贺先戴耀王维新赵丹阳王荣良
Owner DALIAN JOIN KING FINE CHEM CO LTD
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