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A kind of photolysis impurity of melphalan and its salt and its hplc detection method

A detection method, the technology of melphalan, is applied in the field of photolysis impurities and HPLC detection, which can solve the problems of inability to monitor PD1 and PD2 at the same time, and inability to accurately quantify, to improve detection sensitivity and durability, and prolong retention time. , Control the effect of product quality

Active Publication Date: 2022-07-01
NANJING SIMCERE DONGYUAN PHARM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Using the European Pharmacopoeia method to detect the product of melphalan hydrochloride after photolysis with C18 column, it was found that PD1 peaked at the dead volume and could not be quantified accurately. Therefore, this method cannot be used for simultaneous monitoring of PD1 and PD2.

Method used

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  • A kind of photolysis impurity of melphalan and its salt and its hplc detection method
  • A kind of photolysis impurity of melphalan and its salt and its hplc detection method
  • A kind of photolysis impurity of melphalan and its salt and its hplc detection method

Examples

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Embodiment 1

[0039] Example 1: Discovery and identification of photodegradable impurities

[0040] Chromatographic conditions (refer to Pharmacopoeia method): the chromatographic column is Waters Atlantis T3 column (4.6mm×150mm, 3μm); mobile phase A is 0.01mol / L ammonium acetate solution (adjusted to pH 4.6 with acetic acid), mobile phase B is acetonitrile, gradient The elution is as follows: 0min(95%A-5%B)→20min(40%A-60%B)→25min(40%A-60%B); the flow rate is 1.5ml / min; the injection volume is 10μl; The detection wavelength was 260 nm; the column temperature was 35 °C.

[0041] Place melphalan hydrochloride for 10 days under light conditions (4500lx ± 500lx), dissolve it with methanol and dilute it to a solution of 0.5 mg / ml, and inject and analyze according to the above chromatographic conditions. Chromatograms from melphalan hydrochloride illuminated samples ( figure 1 ), it can be seen that melphalan hydrochloride will produce two large degradation impurities under light conditions, wh...

Embodiment 2

[0044] Example 2: Synthesis of 4-(2-chloroethylamino)-L-phenylalanine hydrochloride

[0045] The synthetic route is as follows:

[0046]

[0047]Dissolve 2 g of N,N-phthaloyl-4-amino-L-phenylalanine ethyl ester (compound A) in 20 ml of ethanol, add 1 ml of triethylamine and 0.8 g of bromoethanol, and react at room temperature for 24 After 1 hour, ethanol was evaporated under reduced pressure, and then a large amount of water was added, extracted with dichloromethane, the organic phase was collected, and 1.7 g of compound B was obtained by column chromatography. Dissolve 1.5 g of compound B in 15 ml of dichloromethane, add 0.8 ml of phosphorus oxychloride, react at 30° C. for 5 hours, and remove the dichloromethane by rotary evaporation to obtain 1.3 g of compound C. Compound C was reacted with concentrated hydrochloric acid under reflux for 12 hours, then stirred at low temperature in ethanolic hydrogen chloride solution for 1 hour, and the solvent was removed by rotary ev...

Embodiment 3

[0049] Example 3: Determination of Photodegradation Impurities by the Method of the Invention

[0050] 1. Chromatographic conditions

[0051] Chromatographic column: Atlantis HILIC column (4.6mm×150mm, 3μm); mobile phase: 0.1mol / L ammonium formate solution (formic acid adjusted to pH 3.0): acetonitrile=13:87; flow rate: 1.0ml / min; injection volume: 20μl; column temperature: 35°C; detection wavelength: 260nm. Under the chromatographic conditions, the photodegradation impurities PD1, PD2 and other impurities in melphalan hydrochloride can be completely separated.

[0052] 2. Preparation of Solutions

[0053] Impurity stock solution: Precisely weigh appropriate amounts of impurities PD1 and PD2 respectively, dissolve and dilute them with methanol to obtain an impurity stock solution with a concentration of 25 μg / ml.

[0054] Reference solution: Take the impurity stock solution and quantitatively dilute it with methanol to a solution of 1.5 μg / ml.

[0055] Test solution: Accur...

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Abstract

The invention provides a photolysis impurity of melphalan and its salt and an HPLC detection method thereof. The chromatographic condition used in this method is a hydrophilic interaction chromatographic column such as an Atlantis HILIC column, the mobile phase is composed of an aqueous solution containing amine substances and an organic solvent, and the detection wavelength is 250-350 nm. After using the HPLC analysis method of the present invention, impurities 4-amino-L-phenylalanine hydrochloride (PD1) and 4-(2-chloroethylamino) in melphalan and its salt raw materials and preparations can be effectively separated )‑L‑phenylalanine hydrochloride (PD2), which provides a good method for effectively controlling product quality.

Description

technical field [0001] The invention relates to photolysis impurities of melphalan and its salts and a HPLC detection method thereof. Background technique [0002] Melphalan hydrochloride is a left-handed phenylalanine nitrogen mustard hydrochloride, and its chemical structure is as follows: [0003] [0004] On January 17, 1964, 2mg melphalan tablet was launched in the United States, and its active ingredient was melphalan; on November 18, 1992, melphalan hydrochloride injection ALKERAN was launched in the United States, and the active ingredient was melphalan hydrochloride Salt. Due to the existence of phenylalanine group, it is easy to enter into tumor cells to take effect, thereby effectively inhibiting and preventing the proliferation and maturation of malignant tumor cells. Melphalan and its hydrochloride monosalt are widely used in multiple myeloma, breast cancer, ovarian cancer, chronic lymphocytic and myeloid leukemia, malignant lymphoma, and multiple myeloma. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02C07C229/42
CPCG01N30/02C07C229/42
Inventor 陈雪琴张永鑫高芳石虹姬莉芳王莉李薇
Owner NANJING SIMCERE DONGYUAN PHARM CO LTD
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