Cefathiamidine hydrate and preparation method and application thereof

A technology of cefathiamidine and hydrate, which is applied in the field of medicine, can solve the problems such as the preparation method and use of cefathiamidine crystal hydrate that are not reported in the literature, and achieves improved operability, good sliding property, and convenient storage and transportation. Effect

Inactive Publication Date: 2011-09-14
LIANHE KANGXING BEIJING PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, there is no published literature at home and abroad to report cefathiamidine crystalline hydrate and its preparation method and use

Method used

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  • Cefathiamidine hydrate and preparation method and application thereof
  • Cefathiamidine hydrate and preparation method and application thereof
  • Cefathiamidine hydrate and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1 Preparation of Cefathiamidine 0.25 Hydrate Suspend 8 g of 7-bromoacetyl ACA in 160 ml of dichloromethane, add 3 ml of triethylamine, stir to dissolve completely, add 0.2 g of activated carbon and stir for 30 minutes, filter, filter Wash the cake with 10ml of dichloromethane, combine the filtrate and washing liquid, add 3.8g of N,N'-diisopropylthiourea, stir, react at 35-40°C for 1.5 hours, cool to below 15°C, and slowly add Acetone 200ml, chloroform 20ml, stand for 3 hours, filter with suction, soak the crystals with a small amount of chloroform and acetone 3 times, filter with suction, dissolve the obtained solid in 10ml of water, slowly add 200ml of ethanol, 10ml of acetonitrile for recrystallization, 0℃ Place it below until the precipitate is fully separated, filter it to dryness, and dry the solid at about 40 ° C for about 5 hours to obtain 3.3 g of off-white crystals, melting point: 155 ° C decomposition (ELECTROTHERMAL MELTING POINT APPARATUS, uncorrected...

Embodiment 2

[0056] Example 2 Preparation of Cefathiamidine 0.25 Hydrate Suspend 8 g of 7-bromoacetyl ACA in 180 ml of dichloromethane, add 3.2 ml of diisopropylamine, stir to dissolve completely, add 0.2 g of activated carbon and stir for 25 minutes, filter, Wash the filter cake with 10ml of chloroform, combine the filtrate and washing liquid, add 3.8g of N,N'-diisopropylthiourea to it, stir, react at 35-40°C for 1.5 hours, cool to below 10°C, and slowly add acetone 200ml, 20ml ethyl acetate, stand for 3 hours, filter with suction, soak the crystals with a small amount of acetone and acetonitrile for 3 times, filter with suction, dissolve the obtained solid in 10ml of water, slowly add 20ml of ethanol and 120ml of ether for recrystallization, 0 Place below ℃, wait until the precipitate is fully separated, filter to dryness, and dry the solid at about 35℃ for about 5 hours to obtain 2.1g of off-white crystals, melting point: 155℃ decomposition (ELECTROTHERMAL MELTING POINT APPARATUS, uncorr...

Embodiment 3

[0058] Example 3 Put 5 g of cefathiamidine in a container and add 10 ml of water to dissolve it, put the solution in a freeze-drying box, lower the temperature of the liquid to -40°C, and pre-freeze for 4 hours; lower the temperature of the condenser to -45°C, Vacuumize, control the degree of vacuum and control the temperature of the plate layer to rise below -15°C, freeze and sublimate, and sublimate and dry for about 17 hours; continue heating to gradually increase the temperature to about 30°C at a rate of 10°C per hour, and keep warm for about 3 hours. Close the hydrazine butterfly valve of the box for 3 minutes, and when the pressure of the box rises to within 5Pa, the entire freeze-drying process is ended, and the gas is released from the box to obtain cefathiamidine 0.5 hydrate; [α] D 20 : +140; Karl Fischer's method of measuring moisture is 1.96%, thermal analysis: platform weight loss of about 1.80%, which is within the error range with the result of the sample contai...

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Abstract

The invention relates to a cefathiamidine hydrate and a preparation method and application thereof. The crystalline hydrate has high storage stability, is suitable for preparing bacteria sensitive to Gram-positive or negative bacteria, and is applied to the preparation of medicaments for treating or preventing infection of respiratory systems, liver and gall bladder systems, five sense organs, urogenital systems, bones, joints and skin soft tissues as well as diseases such as endocarditis, septicemia, brain fever and the like of human beings or animals caused by bacteria which are sensitive to Gram-positive or negative bacteria.

Description

technical field [0001] The invention relates to the technical field of medicines, and specifically provides an antibacterial drug-ceftiamidine hydrate, a preparation method and application thereof. Background technique [0002] At present, the published literature only reports cefathiamidine (Cefathiamidine), chemical name (6R, 7R)-3[(acetoxy)methyl]-7-[α-(N,N-diisopropylamidinesulfur Base)-acetylamino]-8-oxo-5-thia-1-azabicyclo[4,2,0]oct-2-ene-2-carboxylate betaine (C 19 h 28 N 4 o 6 S 2 , Molecular Weight: 472.59), [References: Wang Wenmei. The cephalosporin developed by my country——Cefathiamidine, World Clinical Drugs, 2003, 24(3): 179-181; Zhao Tiejun. Cefathiamidine in the treatment of acute and chronic renal pelvis Curative Effect Analysis of Nephritis, Chinese Journal of Antibiotics, 2006, 31(12): 721-722]. [0003] So far, there is no published literature at home and abroad to report cefathiamidine crystalline hydrate and its preparation method and application. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D501/28C07D501/06C07D501/12A61K31/545A61K31/431A61K31/43A61K31/424A61P31/04A61P11/00A61P1/16A61P13/00A61P15/00A61P19/02A61P19/08A61P17/00A61P9/00A61P7/00
Inventor 刘力
Owner LIANHE KANGXING BEIJING PHARMA
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