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Doripenem intermediate solvate

A technology for doripenem and intermediates, applied in the field of ethanolate of doripenem intermediates, can solve the problems of low safety, long preparation cycle, toxicity, etc., and achieve the effects of easy storage, low toxicity and good stability

Active Publication Date: 2013-06-05
SHANGHAI RUNSHI MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purity and storage stability of the methanolate compound of formula 2 prepared by this application have been significantly improved, but its preparation requires first dissolving the amorphous compound of formula 2 in a soluble solvent such as ethyl acetate and dichloromethane, and then adding Methanol, stirring, and then the compound of formula 2 precipitates methanol solvate, the preparation cycle is long, and organic solvents such as dichloromethane and methanol have certain toxicity and low safety

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0055] Example 1: Preparation of the ethanolate of the doripenem intermediate shown in formula 2.

[0056] Compound 4 (33.6kg, 63.1mol) was dissolved in methanol (140kg), concentrated sulfuric acid (15.8kg) was added dropwise, heated to 65°C and refluxed for 2.5h, then cooled to 25°C, and concentrated to 110mL under reduced pressure. Pour the concentrated solution into a mixed solution of ethyl acetate (225kg) and water (250kg), separate the liquids, wash the organic phase three times with 5% NaCl (175kg), and back-extract the aqueous phase with ethyl acetate (90kg) each time , combined the organic phases and dried over anhydrous sodium sulfate for 1 h. Concentrated under reduced pressure to 70kg, added to compound 3 (30.0kg, 50.5mol) and DMF (143kg) mixture, cooled to 0°C under nitrogen protection, added DIPEA dropwise, stirred at 0-5°C for 18h.

[0057] After the reaction, 2 times the volume of ethanol was added to the reaction solution, stirred at room temperature for 4 h...

Embodiment 2

[0063] Example 2: Preparation of an intermediate of doripenem represented by formula 2 (refer to Document 1).

[0064] Compound 4 (33.6g, 0.0631mol) was dissolved in methanol (140g), concentrated sulfuric acid (15.8g) was added dropwise, heated to 65°C and refluxed for 2.5h, then cooled to 25°C, and concentrated to 110mL under reduced pressure. The concentrated solution was poured into a mixed solution of ethyl acetate (225g) and water (250g), separated, the organic phase was washed three times with 5% NaCl (175g), and each aqueous phase was back-extracted with ethyl acetate (90g) , combined organic phases, concentrated under reduced pressure to 70g, added to compound 3 (30.0g, 0.0505mol) and DMF (143g) mixture, cooled to 0°C under nitrogen protection, added DIPEA dropwise, stirred at 0-5°C for 18h, Then the reaction solution was introduced into ethyl acetate (200g) and water (225mL), the phases were separated, and the organic phase was successively washed with 0.7%HCl (153g),...

Embodiment 3

[0065] Example 3: Preparation of the ethanolate of the doripenem intermediate shown in formula 2.

[0066] Dissolve 10 g of the crude doripenem intermediate obtained in Example 2 in 90 mL of ethyl acetate, then add 360 mL of ethanol, stir at 10°C for 8 hours, filter with suction, wash with ethanol, and dry in vacuo at 25°C for 6 hours to obtain a pale yellow solid 8.8 g, yield 88%, HPLC purity 98.448%.

[0067] The gained solid is subjected to X-ray powder diffraction, and the main characteristic peaks are as follows (see attached figure 2 ):

[0068] .

[0069] The resulting solid was subjected to a DSC test, showing an endothermic peak at 114.57°C and an exothermic peak at 199.76°C (see attached Figure 4 ).

[0070] The ethanol content of the obtained solid was determined by gas phase, and the molar ratio of ethanol to the doripenem intermediate shown in Formula 2 was 0.25:1.

[0071] The resulting solid was 1 H-NMR (500 MHz, Acetone-d6) test, from the obtained sp...

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Abstract

The invention relates to a Doripenem intermediate alcoholate shown as a formula 2 and a preparation method and application of the Doripenem intermediate alcoholate. Doripenem intermediate alcoholate is stable in property, easy to preserve, and high in purity, and establishes a foundation for a following hydrogenating deprotection reaction. The preparation method of the alcoholate is simple in operation, and a used crystallization reagent is ethanol which is less harmful to human health and environment, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a drug intermediate solvate, in particular to a doripenem intermediate alcoholate, a preparation method and an application thereof. Background technique [0002] Doripenem, Doripenem, the chemical name is (4R,5S,6S)-3-[((3S,5S)-5-[[(sulfamoyl)amino]methyl]-3-pyrrolidinyl)mercapto -6-[(1R)-1-hydroxyethyl]4-methyl-7-oxyl-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid], the structural formula is as follows 1 shows: [0003] . [0004] Doripenem is a new carbapenem antibiotic, the 2-side chain is a tetrahydropyrrole ring substituted with sulfamamide. The structure-activity relationship research shows that the acylation or sulfonylation of the side chain amino group is conducive to the increase of antibacterial activity, and its inhibitory activity against Gram-positive bacteria is higher than that of meropenem, and its inhibitory activity against Gram-negative bacteria is higher than that of meropenem. Imipenem, which is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D477/20C07D477/06
CPCY02P20/55
Inventor 史颖陈玉洁杨品贾铭康宏艳刘然
Owner SHANGHAI RUNSHI MEDICAL TECH CO LTD
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