Crystal form of hydronidone, preparation method and application thereof

A technology of oxynidone and crystal form, applied in the field of medicinal chemistry, can solve the problems of low solubility and dissolution rate of oxynidone, unsatisfactory bioavailability, poor stability, etc., and achieve good application value and good reproducibility , the effect of high yield

Active Publication Date: 2021-07-27
BEIJING CONTINENT PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the oxynidone obtained by the above-mentioned preparation method has the problems of solubility (especially water solubility) and

Method used

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  • Crystal form of hydronidone, preparation method and application thereof
  • Crystal form of hydronidone, preparation method and application thereof
  • Crystal form of hydronidone, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Embodiment 1 (preparation of amorphous Oxynione A)

[0100] About 11 g of F351 was placed in a 50 mL ceramic crucible. The crucible is then placed in the muffle furnace. Set the temperature of the muffle furnace at 190°C, and heat it within about 40 minutes until the contents are completely melted. In addition, prepare an iron pan in advance, and place the iron pan in an ice-water bath to keep the temperature constant. After the F351 in the crucible was completely melted, it was poured into the iron pan to obtain 10.5 g of a light yellow transparent lumpy solid, which was designated as Amorphous A. It was used directly in subsequent experiments.

Embodiment 2

[0101] Example 2 (recrystallization in ethyl acetate to obtain crystal form B1)

[0102] 10g of F351 was placed in a 500ml single-necked bottle, and 300ml of ethyl acetate was added thereto. The mixture was heated to reflux to obtain a suspension, during which stirring was continued for 30 min. The temperature of the obtained solution was lowered to room temperature (the cooling rate was about 2° C. / min), during which solids were gradually precipitated. It was filtered and vacuum-dried to obtain 8 g of white powder, which was designated as Form B1 and used directly in subsequent experiments.

Embodiment 3

[0103] Example 3 (recrystallization in ethanol to obtain crystal form B2)

[0104] Put 10g of F351 in a 500ml single-necked bottle, and add 50ml of ethanol to it. The mixture was heated to reflux and the solids were all dissolved until a clear solution was obtained, stirring during this and continued for 30 min after a clear solution was obtained. The temperature of the obtained solution was lowered to room temperature (the cooling rate was about 2° C. / min), during which solids were gradually precipitated. It was filtered and vacuum-dried to obtain 7.7 g of white powder, which was designated as Form B2, which was directly used in subsequent experiments.

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Abstract

The invention relates to a novel crystal form of hydronidone, a preparation method and application thereof, in particular to a novel hydronidone crystal form with better stability, oral exposure and bioavailability.

Description

technical field [0001] The invention relates to a new crystal form of oxynidone, a preparation method and application thereof, and belongs to the field of medicinal chemistry. Background technique [0002] Fibrosis is a very widespread disease that can occur in various organs. The main pathological changes are the increase of fibrous connective tissue and the decrease of parenchymal cells in organ tissues. Continuous progress can lead to organ structural damage and functional decline, until organ failure. Once fibrosis occurs, the function of organs will be greatly compromised. [0003] Liver fibrosis is a pathophysiological process and a common pathological basis in the progression of chronic liver diseases. Various pathogenic factors cause liver cell degeneration, necrosis, and abnormal hyperplasia of connective tissue. If the damage factors in the liver repair process cannot be removed for a long time, the long-term continuous fibrosis process will eventually lead to th...

Claims

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Application Information

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IPC IPC(8): C07D213/64A61K31/4418A61P1/16
CPCC07D213/64A61P1/16C07B2200/13
Inventor 叶雁萍陈建麒
Owner BEIJING CONTINENT PHARM CO LTD
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