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Preparation method of isavuconazonium monosulfate through oxidation-reduction reactions

A technology of isavuconazolium and sulfate, which is applied in the field of pharmacy, can solve problems such as instability, difficulty in industrial production, and poor operability of the process, and achieve simple process operation, precise ratio control, and avoid process steps Effect

Active Publication Date: 2017-07-04
YANGTZE RIVER PHARM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Huo Caixia et al. (June 2016, International Journal of Pharmaceutical Research, Vol. 43, No. 3) prepared isavuconazolium hydroxide by using a hydroxyl-type ion exchange resin, and then used sulfuric acid to realize the salt-type conversion. However, , isavuconazolium is easily decomposed in a neutral or alkaline environment, so the stability of isavuconazolium hydroxide is extremely poor, and it cannot even exist stably. Difficult to achieve industrial production

Method used

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  • Preparation method of isavuconazonium monosulfate through oxidation-reduction reactions
  • Preparation method of isavuconazonium monosulfate through oxidation-reduction reactions
  • Preparation method of isavuconazonium monosulfate through oxidation-reduction reactions

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Effect test

preparation example Construction

[0036] The preparation technology of formula 4 compound is:

[0037]

[0038] (1) preparation of formula 8 compounds

[0039] In the 5L three-necked round bottom reaction flask, add formula 10 compound successively, i.e. diethyl dithiophosphate (804g), formula 7 compound (300g), Virahol (1.5L) and purified water (194ml), heat up under stirring To reflux reaction (oil temperature 85°C), internal temperature 78°C, keep reflux, gradually a large amount of H 2 S gas is released until the temperature stabilizes at an internal temperature of 78°C, without a large amount of gas being released, and the temperature is kept stirring. After 15 hours, sampling and monitoring were performed, and TLC showed that SM1 spots disappeared and new spots were formed.

[0040] Cool down to below 20°C, add DCM (1.5L), purified water (1.5L). Slowly add 10wt% NaOH solution (about 2.3 L) dropwise under stirring to adjust the pH value to 7-8, and the system turns yellow and gray during the additio...

Embodiment 1

[0055] The preparation of formula 5 compound

[0056] The compound of formula 4 (100 g), the compound of formula 2 (133 g), NaI (48 g) and anhydrous acetonitrile (500 ml) were sequentially added into a 1 L single-necked round-bottomed reaction flask, replaced by nitrogen, and protected by nitrogen. Under stirring, heat up to oil temperature of 60°C, internal temperature of 50°C, keep stirring for 12 hours. Cool down to below 20°C, filter, and wash the filter cake with EA. EA (400ml) and purified water (1000ml) were added to the filtrate, followed by stirring and extraction. Separation, the upper EA phase is wine red. The lower aqueous phase was extracted twice with EA (100ml), the organic phases were combined, washed with saturated NaCl solution (100ml), dried by adding 40g of anhydrous sodium sulfate, and concentrated under reduced pressure to obtain a foamy solid, which was directly used in the next reaction.

[0057] Yield 81%. HPLC purity >90%.

Embodiment 2

[0059] The preparation of formula 6 compound

[0060] The concentrated foamy solid in Example 1 was dissolved in 900ml of EA, then 900ml of purified water was added, and placed in a three-necked round-bottomed reaction flask of 3L, after adding CuSO 4 5H 2 O (80g), keep stirring at 25°C for 1h, the color of the system changes from deep red to wine red during the stirring process.

[0061] Leave to stand for stratification, separate the aqueous phase and the organic phase, the color of the aqueous phase is blue, and the organic phase is wine red. The organic phase was washed twice with water, washed with saturated NaCl solution, dried over anhydrous sodium sulfate (30 g), and concentrated to a foamy solid. The foamy solid was dissolved in DCM (0.5 L), and silica gel (300 g) was added, stirred evenly, and then rotary evaporated under reduced pressure to powder. The samples were loaded by dry method, purified by column chromatography, 2000g of silica gel was loaded into the c...

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Abstract

The invention discloses a preparation method of isavuconazonium monosulfate through oxidation-reduction reactions. According to the preparation method, isavuconazole, N-methyl-N-(3-[((N-t-butyloxycarboryl-N-methylamino)acetoxyl)methyl]pyridine-2-yl) (1-chloroethyl)carbamate, and iodine salts carry out reactions to obtain iodine salts of isavuconazonium with protected Boc; then the iodine salts of isavuconazonium with protected Boc is oxidized by CuSO4 to obtain sulfate of isavuconazonium with protected Boc; and finally the Boc is removed by sulfuric acid to obtain isavuconazonium monosulfate. The preparation method has the advantages that the ratio of salt forms of isavuconazonium monosulfate can be precisely controlled, the operation is simple, complicated steps such as trisulfate pH value adjustment, salt form converse through ion exchange, and the like are avoided, the total purity can reach more than 98&, and the indexes of related substances are qualified.

Description

technical field [0001] The invention belongs to the field of pharmacy, and in particular relates to a process for preparing isavuconazolium monosulfate through redox reaction. Background technique [0002] Isavuconazonium sulfate (Isavuconazonium sulfate) was jointly developed by Astellas (Japan) and Basilea (Switzerland), and the FDA has granted it a qualified infectious disease product (QIDP). antifungal drugs. On July 8, 2014, Astellas submitted a marketing application to the FDA and was approved in March 2015. It is a prodrug for the treatment of invasive aspergillus infection and invasive mucormycosis infection. [0003] In the blood, the prodrug is rapidly hydrolyzed into the active substance isavuconazole by the action of esterase (mainly butyrylcholinesterase). The mechanism of action of isavuconazole is similar to that of other azole antifungal drugs, and its mechanism of action is mainly to reduce the synthesis of ergosterol. Ergosterol is an essential substance...

Claims

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Application Information

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IPC IPC(8): C07D417/14
Inventor 周崴海阴启明龚仁巍韩冬吴川周华新倪海华郝秀斌
Owner YANGTZE RIVER PHARM GRP CO LTD
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